Replies: 32 comments 95 replies
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@davemevans
<SegmentationUpid name="AiringID" segmentationUpidType="0x8" segmentationUpidFormat="hexbinary" segmentationUpidLength="8"/> |
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@davemevans I know exactly what you need to do, make a __ threefive.xsd__ , that handles the ##any properly and get rid of the component and other old stuff and we can post on one of my servers and include in the releases. I'll try to push it on SCTE and everyone else. That's would be __HUGE. We need a threefive schema, that can be validated against. |
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Even if we only use it to validate threefive output, that would save us so much time. Just like you said , people are going to want to validate, let's give them a way to do it. |
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@davemevans sd=Node('SegmentationDescriptor',attrs=sd_attrs)
the_upid = self.mk_the_upid()
upid_node = the_upid.xml()that's how I do it right now, but we could do it like sd=Node('SegmentationDescriptor',attrs=sd_attrs)
the_upid = self.mk_the_upid()
sd = the_upid.xml(sd) <---- just pass the sd Node in and attach child nodes directly to it and return the node. |
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Cool cool - will have some faith, let you work, and come back in a bit when things are more stable. My use case is to take an arbitrary binary cue, convert it to XML representation, then run an arbitrary xpath evaluation against that eg |
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Yes, that approach makes sense - tell the child its parent and have it attach itself. |
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class Upid:
"""
Upid base class handles URI UPIDS
"""
def __init__(self, bitbin=None, upid_type=0, upid_length=0):
self.bitbin = bitbin
self.upid_type = upid_type
self.upid_name = upid_map[upid_type][0]
self.upid_length = upid_length
self.bit_length = upid_length << 3
self.upid_value = None
def decode(self):
"""
decode Upid
"""
self.upid_value = self.bitbin.as_charset(self.bit_length, charset)
return self.upid_name, self.upid_value
def encode(self, nbin ):
"""
encode Upid
"""
if self.upid.value:
self.upid.value = self.upid.value.encode("utf8")
nbin.add_bites(self.upid.value)
def xml(self):
"""
xml return a upid xml node
"""
ud_attrs = { 'name': self.upid_name, # this is for clarity
'segmentation_upid_type': hex(self.upid_type),
'segmentation_upid_format':'hexbinary',
'segmentation_upid_length':self.upid_length,}
return Node('SegmentationUpid',attrs= ud_attrs, value=self.upid_value) |
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What I didn't realise at the time I said that is that these things are constructed every time they are needed rather than hanging around. So it probably didn't actually really matter. This could help but as it is now, it is possibly worse - it's not really clear to me how this can work when it is called in SegmentationDescriptor.xml() since there is no bitbin from which to decode any value. So you have to explicitly set Also, For MPU support, there will need to be a way to pass in at least one more attribute ( |
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You're over thinking it .
"segmentation_upid": {
"format_identifier": "RTLN",
"private_data": "0x3148010000000031333736393230323534343935483100"
},Here's a mid decoded "segmentation_upid_type_name": "MID",
"segmentation_upid_length": 17,
"segmentation_upid": [
{
"upid_type": 14,
"upid_type_name": "ADS Info",
"upid_length": 5,
"segmentation_upid": "LA309"
},
{
"upid_type": 8,
"upid_type_name": "AiringID",
"upid_length": 8,
"segmentation_upid": "0x2e538481"
}
],
"segmentation_type_id": 52, |
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In the segmentationDescriptor.xml example above, the value isn't in the Upid instance because it isn't set when you |
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Scratch that last part. It's better to have one special instance that to change them all. # Segmentation Descriptor xml has this in it
def xml(self):
"""
Create a Node describing a SegmentationDescriptor
"""
.
.
.
sd=Node('SegmentationDescriptor',attrs=sd_attrs)
the_upid = self.mk_the_upid()
upid_node = the_upid.xml()
if isinstance(upid_node,list): #<-- check if it's a list
_=(sd.add_child(node) for node in upid_node) #<----- add each mid upid as a child of sd
This is the MID class xml()
def xml(self):
"""
xml return a upid xml node
"""
mid_nodes =[]
for u in self.upid_value:
u_attrs = ["upid_type": u['upid_type'],
"name": u['upid_type_name'],}
value= u["segmentation_upid"]
node= Node('SegmentationUpid', attrs=u_attrs, value=value)
mid_nodes.append(node)
return mid_nodes
|
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Sorry, I'm doing three things at once. don't call mk_the_upid,, you're right. I'll sort this out, but I gotta go for a little bit, |
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This is easy, they all have the same vars
def xml(self):
"""
Create a Node describing a SegmentationDescriptor
"""
....
self.segmentation_upid_type = bitbin.as_int(8)
self.segmentation_upid_length = bitbin.as_int(8)
the_upid = self.mk_the_upid(bitbin=None)
# populate the upid's values
the_upid.upid_name= self.segmentation_upid_type_name # mk_the_upid passes segmentation_upid_type and length in already
the_upid.upid_value= self.segmentation_upid
# call the_upid.xml()
upid_node = the_upid.xml()
if isinstance(upid_node,list):
_=(sd.add_child(node) for node in upid_node)
else:
sd.add_child(upid_node)
......
def xml(self):
"""
xml return a upid xml node
"""
mid_nodes =[]
for u in self.upid_value:
u_attrs = ["upid_type": u['upid_type'],
"name": u['upid_type_name'],}
value= u["segmentation_upid"]
node= Node('SegmentationUpid', attrs=u_attrs, value=value)
mid_nodea.append(node)
return mid_nodes |
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Does that make sense? |
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Dave, <SpliceInfoSection ptsAdjustment="0" protocolVersion="0" sapType="3" tier="8" xmlns="http://www.scte.org/schemas/35">
<TimeSignal>
<SpliceTime ptsTime="3522714355"/>
</TimeSignal>
<SegmentationDescriptor segmentationEventId="1207959743" segmentationEventCancelIndicator="false" segmentationEventIdComplianceIndicator="true" segmentationTypeId="52" segmentNum="0" segmentsExpected="0" subSegmentNum="0" subSegmentsExpected="0" segmentationDuration="16317027">
<DeliveryRestrictions webDeliveryAllowedFlag="false" noRegionalBlackoutFlag="true" archiveAllowedFlag="true" deviceRestrictions="3"/>
<SegmentationUpid upidType="14" name="ADS Info">LA309</SegmentationUpid>
<SegmentationUpid upidType="8" name="AiringID">0x2e538481</SegmentationUpid>
</SegmentationDescriptor>
</SpliceInfoSection> |
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There is super easy way SCTE could fix this, is to make SegmentationDescriptor.segmentation_upid, segmentation_upids, a list. |
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okay. We'll change it back |
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done. |
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@davemevans We could just make comment nodes, couldn't we? Also , you need to tell me what you're trying to accomplish so I can keep it mind. |
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I can do it like this <!-- Created with Unified Streaming Platform (version=1.14.2-30503) -->I'll just put the stuff that isn't in the xsd in comment nodes. Easy fix. , that works just fine.Any problem with comment nodes? |
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Yeah, this is a great shout 👌 |
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Most of the UPiDa are now working. Upid Xml output0x3 : ABCD0123456H
<SpliceInfoSection ptsAdjustment="0" protocolVersion="0" sapType="3" tier="4095" xmlns="http://www.scte.org/schemas/35">
<TimeSignal>
<SpliceTime ptsTime="0"/>
</TimeSignal>
<SegmentationDescriptor segmentationMessage="Program Start" segmentationEventId="3" segmentationEventCancelIndicator="false" segmentationEventIdComplianceIndicator="true" segmentationTypeId="16" segmentNum="0" segmentsExpected="0" segmentationDuration="2702700">
<SegmentationUpid name="AdID" segmentationUpidType="3" segmentationUpidFormat="hexbinary" segmentationUpidLength="12">ABCD0123456H</SegmentationUpid>
</SegmentationDescriptor>
</SpliceInfoSection>
0x6 : 0x3a8d000000000000
<SpliceInfoSection ptsAdjustment="0" protocolVersion="0" sapType="3" tier="4095" xmlns="http://www.scte.org/schemas/35">
<TimeSignal>
<SpliceTime ptsTime="0"/>
</TimeSignal>
<SegmentationDescriptor segmentationMessage="Program Start" segmentationEventId="6" segmentationEventCancelIndicator="false" segmentationEventIdComplianceIndicator="true" segmentationTypeId="16" segmentNum="0" segmentsExpected="0" segmentationDuration="2702700">
<SegmentationUpid name="ISAN" segmentationUpidType="6" segmentationUpidFormat="hexbinary" segmentationUpidLength="12">0x3a8d000000000000</SegmentationUpid>
</SegmentationDescriptor>
</SpliceInfoSection>
0x7 : MV0004146400
<SpliceInfoSection ptsAdjustment="0" protocolVersion="0" sapType="3" tier="4095" xmlns="http://www.scte.org/schemas/35">
<TimeSignal>
<SpliceTime ptsTime="0"/>
</TimeSignal>
<SegmentationDescriptor segmentationMessage="Program End" segmentationEventId="3" segmentationEventCancelIndicator="false" segmentationEventIdComplianceIndicator="true" segmentationTypeId="17" segmentNum="0" segmentsExpected="0">
<SegmentationUpid name="TID" segmentationUpidType="7" segmentationUpidFormat="hexbinary" segmentationUpidLength="12">MV0004146400</SegmentationUpid>
</SegmentationDescriptor>
</SpliceInfoSection>
0xe : ADS-UPID:aa85bbb6-5c43-4b6a-bebb-ee3b13eb7999
<SpliceInfoSection ptsAdjustment="0" protocolVersion="0" sapType="3" tier="4095" xmlns="http://www.scte.org/schemas/35">
<TimeSignal>
<SpliceTime ptsTime="0"/>
</TimeSignal>
<SegmentationDescriptor segmentationMessage="Program End" segmentationEventId="11" segmentationEventCancelIndicator="false" segmentationEventIdComplianceIndicator="true" segmentationTypeId="17" segmentNum="0" segmentsExpected="0">
<SegmentationUpid name="ADS Info" segmentationUpidType="14" segmentationUpidFormat="hexbinary" segmentationUpidLength="45">ADS-UPID:aa85bbb6-5c43-4b6a-bebb-ee3b13eb7999</SegmentationUpid>
</SegmentationDescriptor>
</SpliceInfoSection>
0x4 : 060a2b34.01010105.01010d20.13000000.d2c9036c.8f195343.ab7014d2
<SpliceInfoSection ptsAdjustment="0" protocolVersion="0" sapType="3" tier="4095" xmlns="http://www.scte.org/schemas/35">
<TimeSignal>
<SpliceTime ptsTime="0"/>
</TimeSignal>
<SegmentationDescriptor segmentationMessage="None" segmentationEventId="3" segmentationEventCancelIndicator="false" segmentationEventIdComplianceIndicator="true" segmentationTypeId="215" segmentNum="None" segmentsExpected="None">
<SegmentationUpid name="UMID" segmentationUpidType="4" segmentationUpidFormat="hexbinary" segmentationUpidLength="32">060a2b34.01010105.01010d20.13000000.d2c9036c.8f195343.ab7014d2</SegmentationUpid>
</SegmentationDescriptor>
</SpliceInfoSection>
0xd : [{'upid_type': 14, 'upid_type_name': 'ADS Info', 'upid_length': 5, 'segmentation_upid': 'LA309'}, {'upid_type': 8, 'upid_type_name': 'AiringID', 'upid_length': 8, 'segmentation_upid': '0x2e538481'}]
<SpliceInfoSection ptsAdjustment="0" protocolVersion="0" sapType="3" tier="8" xmlns="http://www.scte.org/schemas/35">
<TimeSignal>
<SpliceTime ptsTime="3522714355"/>
</TimeSignal>
<SegmentationDescriptor segmentationMessage="Provider Placement Opportunity Start" segmentationEventId="1207959743" segmentationEventCancelIndicator="false" segmentationEventIdComplianceIndicator="true" segmentationTypeId="52" segmentNum="0" segmentsExpected="0" subSegmentNum="0" subSegmentsExpected="0" segmentationDuration="16317027">
<DeliveryRestrictions webDeliveryAllowedFlag="false" noRegionalBlackoutFlag="true" archiveAllowedFlag="true" deviceRestrictions="3"/>
<SegmentationUpid upidType="14" upidTypeName="ADS Info">LA309</SegmentationUpid>
<SegmentationUpid upidType="8" upidTypeName="AiringID">0x2e538481</SegmentationUpid>
</SegmentationDescriptor>
</SpliceInfoSection>
0x8 : 0x072d08c7
0xc : {'format_identifier': 'RTLN', 'private_data': '0x3148010000000031333736393230323534343935483100'}
<SpliceInfoSection ptsAdjustment="0" protocolVersion="0" sapType="3" tier="4095" xmlns="http://www.scte.org/schemas/35">
<TimeSignal>
<SpliceTime ptsTime="5469869394"/>
</TimeSignal>
<SegmentationDescriptor segmentationMessage="Provider Advertisement End" segmentationEventId="1859042901" segmentationEventCancelIndicator="false" segmentationEventIdComplianceIndicator="true" segmentationTypeId="49" segmentNum="11" segmentsExpected="25">
<SegmentationUpid name="AiringID" segmentationUpidType="8" segmentationUpidFormat="hexbinary" segmentationUpidLength="8">0x072d08c7</SegmentationUpid>
</SegmentationDescriptor>
<SegmentationDescriptor segmentationMessage="Distributor Placement Opportunity End" segmentationEventId="1858902152" segmentationEventCancelIndicator="false" segmentationEventIdComplianceIndicator="true" segmentationTypeId="55" segmentNum="1" segmentsExpected="1">
<SegmentationUpid name="AiringID" segmentationUpidType="8" segmentationUpidFormat="hexbinary" segmentationUpidLength="8">0x011836b21611</SegmentationUpid>
</SegmentationDescriptor>
<SegmentationDescriptor segmentationMessage="Provider Advertisement Start" segmentationEventId="1859063048" segmentationEventCancelIndicator="false" segmentationEventIdComplianceIndicator="true" segmentationTypeId="48" segmentNum="12" segmentsExpected="25" subSegmentNum="2" subSegmentsExpected="42" segmentationDuration="1821600">
<SegmentationUpid name="AiringID" segmentationUpidType="8" segmentationUpidFormat="hexbinary" segmentationUpidLength="8">0x072d5612</SegmentationUpid>
</SegmentationDescriptor>
<SegmentationDescriptor segmentationMessage="Content Identification" segmentationEventId="1859063094" segmentationEventCancelIndicator="false" segmentationEventIdComplianceIndicator="true" segmentationTypeId="1" segmentNum="0" segmentsExpected="0">
<SegmentationUpid name="MPU" segmentationUpidType="12" segmentationUpidFormat="hexbinary" segmentationUpidLength="27">{'format_identifier': 'RTLN', 'private_data': '0x3148010000000031333736393230323534343935483100'}</SegmentationUpid>
</SegmentationDescriptor>
</SpliceInfoSection>
0xb : {'TSID': 241, 'reserved': 3, 'end_of_day': 23, 'unique_for': 511, 'content_id': 'human012'}
<SpliceInfoSection ptsAdjustment="0" protocolVersion="0" sapType="3" tier="4095" xmlns="http://www.scte.org/schemas/35">
<TimeSignal>
<SpliceTime ptsTime="0"/>
</TimeSignal>
<SegmentationDescriptor segmentationMessage="Program Start" segmentationEventId="3" segmentationEventCancelIndicator="false" segmentationEventIdComplianceIndicator="true" segmentationTypeId="16" segmentNum="0" segmentsExpected="0" segmentationDuration="2702700">
<SegmentationUpid name="ATSC" segmentationUpidType="11" segmentationUpidFormat="hexbinary" segmentationUpidLength="12">{'TSID': 241, 'reserved': 3, 'end_of_day': 23, 'unique_for': 511, 'content_id': 'human012'}</SegmentationUpid>
</SegmentationDescriptor>
</SpliceInfoSection>
<SpliceInfoSection ptsAdjustment="0" protocolVersion="0" sapType="3" tier="4095" xmlns="http://www.scte.org/schemas/35">
<TimeSignal>
<SpliceTime ptsTime="2832024813"/>
</TimeSignal>
<SegmentationDescriptor segmentationMessage="Provider Placement Opportunity End" segmentationEventId="1207959725" segmentationEventCancelIndicator="false" segmentationEventIdComplianceIndicator="true" segmentationTypeId="53" segmentNum="2" segmentsExpected="0">
<DeliveryRestrictions webDeliveryAllowedFlag="true" noRegionalBlackoutFlag="true" archiveAllowedFlag="true" deviceRestrictions="3"/>
<SegmentationUpid name="AiringID" segmentationUpidType="8" segmentationUpidFormat="hexbinary" segmentationUpidLength="8">0x2cb2d79d</SegmentationUpid>
</SegmentationDescriptor>
<SegmentationDescriptor segmentationMessage="Program End" segmentationEventId="1207959590" segmentationEventCancelIndicator="false" segmentationEventIdComplianceIndicator="true" segmentationTypeId="17" segmentNum="0" segmentsExpected="0">
<DeliveryRestrictions webDeliveryAllowedFlag="true" noRegionalBlackoutFlag="true" archiveAllowedFlag="true" deviceRestrictions="3"/>
<SegmentationUpid name="AiringID" segmentationUpidType="8" segmentationUpidFormat="hexbinary" segmentationUpidLength="8">0x2cb2d79d</SegmentationUpid>
</SegmentationDescriptor>
<SegmentationDescriptor segmentationMessage="Program Start" segmentationEventId="1207959591" segmentationEventCancelIndicator="false" segmentationEventIdComplianceIndicator="true" segmentationTypeId="16" segmentNum="0" segmentsExpected="0">
<DeliveryRestrictions webDeliveryAllowedFlag="true" noRegionalBlackoutFlag="true" archiveAllowedFlag="true" deviceRestrictions="3"/>
<SegmentationUpid name="AiringID" segmentationUpidType="8" segmentationUpidFormat="hexbinary" segmentationUpidLength="8">0x2cb2d7b3</SegmentationUpid>
</SegmentationDescriptor>
</SpliceInfoSection>
0x9 : SIGNAL:3-sQ4NgFT0OjPsG4WqUQow
<SpliceInfoSection ptsAdjustment="0" protocolVersion="0" sapType="3" tier="4095" xmlns="http://www.scte.org/schemas/35">
<TimeSignal>
<SpliceTime ptsTime="5400000"/>
</TimeSignal>
<SegmentationDescriptor segmentationMessage="Provider Placement Opportunity End" segmentationEventId="1644168586" segmentationEventCancelIndicator="false" segmentationEventIdComplianceIndicator="true" segmentationTypeId="53" segmentNum="0" segmentsExpected="0">
<SegmentationUpid name="ADI" segmentationUpidType="9" segmentationUpidFormat="hexbinary" segmentationUpidLength="29">SIGNAL:3-sQ4NgFT0OjPsG4WqUQow</SegmentationUpid>
</SegmentationDescriptor>
</SpliceInfoSection>
0xa : 0x1478f85ae100b0685b8fb1c8
<SpliceInfoSection ptsAdjustment="0" protocolVersion="0" sapType="3" tier="4095" xmlns="http://www.scte.org/schemas/35">
<TimeSignal>
<SpliceTime ptsTime="0"/>
</TimeSignal>
<SegmentationDescriptor segmentationMessage="Program Start" segmentationEventId="3" segmentationEventCancelIndicator="false" segmentationEventIdComplianceIndicator="true" segmentationTypeId="16" segmentNum="0" segmentsExpected="0" segmentationDuration="2702700">
<SegmentationUpid name="EIDR" segmentationUpidType="10" segmentationUpidFormat="hexbinary" segmentationUpidLength="12">0x1478f85ae100b0685b8fb1c8</SegmentationUpid>
</SegmentationDescriptor>
</SpliceInfoSection>
0xf : urn:uuid:aa85bbb6-5c43-4b6a-bebb-ee3b13eb7999
<SpliceInfoSection ptsAdjustment="0" protocolVersion="0" sapType="3" tier="4095" xmlns="http://www.scte.org/schemas/35">
<TimeSignal>
<SpliceTime ptsTime="0"/>
</TimeSignal>
<SegmentationDescriptor segmentationMessage="Program Start" segmentationEventId="10" segmentationEventCancelIndicator="false" segmentationEventIdComplianceIndicator="true" segmentationTypeId="16" segmentNum="0" segmentsExpected="0" segmentationDuration="2700000">
<SegmentationUpid name="URI" segmentationUpidType="15" segmentationUpidFormat="hexbinary" segmentationUpidLength="45">urn:uuid:aa85bbb6-5c43-4b6a-bebb-ee3b13eb7999</SegmentationUpid>
</SegmentationDescriptor>
</SpliceInfoSection> |
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@wabiloo A lot of the UPIDS are working, upids that are dictionaries don't work yet when creating xml, |
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@davemevans we still need to do the other Splice Commands, Splice Null, Private, and BandwidthReservatiuon. |
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Yeah, happy to take a look at this over the next few days. |
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Looking at PrivateCommand, I note that the other command calculate their own length and set the splice_command_length based on what they read, rather than pass in the signalled splice_command_length. I assume this is to deal with the legacy length of 0xFFF. I'm a bit stuck working out what to do here as I need a length to know when to stop consuming private_bytes, but clearly can't always trust the splice_command_length. Got any ideas? |
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@davemevans First, lets talk comment nodes. I tried doing Comment as a subclass last too, my problem with it is the init, However, when I saw how you did it in Node.mk() and checking the instance, that works, you have mk() already, you need an init , repr, and set depth. def __init__(self,comment):
self.comment = comment
self.depth= None
def __repr__(self):
return self.mk()
def set_depth(self):
"""
set_depth is used to format
tabs in output
"""
if not self.depth:
self.depth = 0I would MUCH rather have it as a separate class, I absolutely agree with you there, |
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@davemevans the Command length is calculated and then set in the Info Section because a lot o people put bad values in the info section, and this way if something changes, when I re-encode, values are verified. The reason it's not done in private, probably because nobody ever uses it. the Private Command doesn't use bitn, it's just raw bytes, def decode(self):
"""
PrivateCommand.decode method
"""
self.identifier = int.from_bytes(
self.bites[0:3], byteorder="big"
) # 3 bytes = 24 bits
self.command_length= len(self.bites) # For Command length it goes here
self.bites = self.bites[3:]
|
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Bacl in the Node.mk() if isinstance(obj, Comment):
return obj.mk(obj)
new_attrs = mk_xml_attrs(obj.attrs)
rendrd = f"{ndent}<{obj.name}{new_attrs}>"
if obj.value:
return f"{rendrd}{obj.value}</{obj.name}>\n"
rendrd = f"{rendrd}\n"
for child in obj.children:
rendrd += obj.mk(child)
if obj.children:
return f"{rendrd}{ndent}</{obj.name}>\n"
return rendrd.replace(">", "/>") |
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Here's an updated private command class class PrivateCommand(SpliceCommand):
"""
Table 13 - private_command
"""
def __init__(self, bites=None):
super().__init__(bites)
self.command_type = 255
self.name = "Private Command"
self.identifier = None
self.private_bytes = None
def decode(self):
"""
PrivateCommand.decode method
"""
self.identifier = int.from_bytes(
self.bites[0:3], byteorder="big"
) # 3 bytes = 24 bits
self.command_length = len(self.bites)
self.private_bytes = self.bites[3:]
def encode(self, nbin=None):
"""
encode private command
"""
nbin = self._chk_nbin(nbin)
self._chk_var(int, nbin.add_int, "identifier", 24) # 3 bytes = 24 bits
nbin.add_bites(self.private_bytes)
return nbin.bites
|
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anything threefive specific uses 'bites' with an i , early on I had some name collisions . |
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Unfortunately this doesn't work because when decode is called self.bites contains the remainder of the cue unparsed up til that point ie it has the descriptor loop length, descriptors and crc. |
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I need cue.py, where are you at on the comment class? |
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I'm just going to accept the pull request and update he comment class. |
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@davemevans , going forward, if you see a problem bring it up and let's decide the plan before you do a pull request. |
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@davemevans def xml(self, binary=False):
"""
xml returns a threefive.Node instance
which can be edited as needed or printed.
"""
if binary:
sig_attrs = {"xmlns": "https://scte.org/schemas/35"}
sig_node = Node("Signal", attrs=sig_attrs)
bin_node = Node("Binary", value=self.encode())
sig_node.add_child(bin_node)
return sig_node
sis = self.info_section.xml()
self.decode() <--- Having this here breaks loading from json and converting to xml without that, the comments don't work. |
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I have no idea why. |
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I also added xml to the threefive cli tool. threefive xml '/DBMAAAAAsrbAP/wBQb+zTXUKAA2AhlDVUVJABWWDH+DCAgAAAAALfOq1zQAAAAAAhlDVUVJAAA3Qn+DCAgAAAAALfOq1zQAAAAAAhmCQA=='it also works on streams threefive xml video.ts |
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and json to xml threefive '/DBMAAAAAsrbAP/wBQb+zTXUKAA2AhlDVUVJABWWDH+DCAgAAAAALfOq1zQAAAAAAhlDVUVJAAA3Qn+DCAgAAAAALfOq1zQAAAAAAhmCQA==' 2>&1 | ./threefive encode xml
<SpliceInfoSection xmlns="https://scte.org/schemas/35" ptsAdjustment="183003" protocolVersion="0" sapType="3" tier="4095">
<TimeSignal>
<SpliceTime ptsTime="3442857000"/>
</TimeSignal>
<!-- Provider Placement Opportunity Start -->
<SegmentationDescriptor segmentationEventId="1414668" segmentationEventCancelIndicator="false" segmentationEventIdComplianceIndicator="true" segmentationTypeId="52" segmentNum="0" segmentsExpected="0" subSegmentNum="0" subSegmentsExpected="0">
<DeliveryRestrictions webDeliveryAllowedFlag="false" noRegionalBlackoutFlag="false" archiveAllowedFlag="false" deviceRestrictions="3"/>
<!-- UPID: AiringID -->
<SegmentationUpid segmentationUpidType="8" segmentationUpidFormat="hexbinary" segmentationUpidLength="8">2df3aad7</SegmentationUpid>
</SegmentationDescriptor>
<!-- Provider Placement Opportunity Start -->
<SegmentationDescriptor segmentationEventId="14146" segmentationEventCancelIndicator="false" segmentationEventIdComplianceIndicator="true" segmentationTypeId="52" segmentNum="0" segmentsExpected="0" subSegmentNum="0" subSegmentsExpected="0">
<DeliveryRestrictions webDeliveryAllowedFlag="false" noRegionalBlackoutFlag="false" archiveAllowedFlag="false" deviceRestrictions="3"/>
<!-- UPID: AiringID -->
<SegmentationUpid segmentationUpidType="8" segmentationUpidFormat="hexbinary" segmentationUpidLength="8">2df3aad7</SegmentationUpid>
</SegmentationDescriptor>
</SpliceInfoSection> |
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|
@wabiloo command line xml to Cue a@fu:~/build/SCTE35_threefive$ cat xemel.txt | threefive encode
{
"info_section": {
"table_id": "0xfc",
"section_syntax_indicator": false,
"private": false,
"sap_type": "0x03",
"sap_details": "No Sap Type",
"section_length": 76,
"protocol_version": 0,
"encrypted_packet": false,
"encryption_algorithm": 0,
"pts_adjustment": 2.033367,
"cw_index": "0x0",
"tier": "0xfff",
"splice_command_length": 5,
"splice_command_type": 6,
"descriptor_loop_length": 54,
"crc": "0x2198240"
},
"command": {
"command_length": 5,
"command_type": 6,
"name": "Time Signal",
"time_specified_flag": true,
"pts_time": 38253.966667
},
"descriptors": [
{
"tag": 2,
"descriptor_length": 25,
"name": "Segmentation Descriptor",
"identifier": "CUEI",
"segmentation_event_id": "0x15960c",
"segmentation_event_cancel_indicator": false,
"segmentation_event_id_compliance_indicator": true,
"program_segmentation_flag": true,
"segmentation_duration_flag": false,
"delivery_not_restricted_flag": false,
"web_delivery_allowed_flag": false,
"no_regional_blackout_flag": false,
"archive_allowed_flag": false,
"device_restrictions": "No Restrictions",
"segmentation_upid_type": 8,
"segmentation_upid_length": 8,
"segmentation_upid": "2df3aad7",
"segmentation_type_id": 52,
"segment_num": 0,
"segments_expected": 0,
"sub_segment_num": 0,
"sub_segments_expected": 0
},
{
"tag": 2,
"descriptor_length": 25,
"name": "Segmentation Descriptor",
"identifier": "CUEI",
"segmentation_event_id": "0x3742",
"segmentation_event_cancel_indicator": false,
"segmentation_event_id_compliance_indicator": true,
"program_segmentation_flag": true,
"segmentation_duration_flag": false,
"delivery_not_restricted_flag": false,
"web_delivery_allowed_flag": false,
"no_regional_blackout_flag": false,
"archive_allowed_flag": false,
"device_restrictions": "No Restrictions",
"segmentation_upid_type": 8,
"segmentation_upid_length": 8,
"segmentation_upid": "2df3aad7",
"segmentation_type_id": 52,
"segment_num": 0,
"segments_expected": 0,
"sub_segment_num": 0,
"sub_segments_expected": 0
}
]
}
|
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|
@davemevans We've added a little over 400 lines of code, xml.py is almost 300 of them. I it's a new ability, it should require code. |
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|
If it's a method is only called by it's own instance, prefix it with an underscore and that way it doesn't show up in the help. class XmlParser(builtins.object)
| Methods defined here:
|
| __init__(self)
|
| chk_node_list(self, node)
| chk_node_list is used to track open xml nodes
|
| mk_active(self, node)
| mk_active sets self.active to the current node name.
|
| mk_attrs(self, node)
| mk_attrs parses the current node for attributes
| and stores them in self.stuff[self.active]
|
| mk_value(self, value, stuff)
| mk_value, if the xml node has a value, write it to self.stuff
|
| <name>value</name>
|
| parse(self, exemel, descriptor_parse=False)
| parse parses an xml string for a SCTE-35 Cue.
|
| ----------------------------------------------------------------------The only that I should have there is parse, the rest I need to prefix with an understorre. |
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Current Cyclomatic Complexity Scorea@fu:~/build/SCTE35_threefive$ radon cc -sa threefive
threefive/packetdata.py
C 8:0 PacketData - A (3)
M 21:4 PacketData.mk_pcr - A (2)
M 31:4 PacketData.mk_pts - A (2)
M 15:4 PacketData.__init__ - A (1)
threefive/upids.py
C 151:0 Eidr - A (3)
C 201:0 Mid - A (3)
M 242:4 Mid.xml - A (3)
C 303:0 Umid - A (3)
C 23:0 Upid - A (2)
M 43:4 Upid.encode - A (2)
C 63:0 NoUpid - A (2)
C 91:0 AirId - A (2)
C 121:0 Atsc - A (2)
M 156:4 Eidr.decode - A (2)
M 170:4 Eidr.encode - A (2)
C 182:0 Isan - A (2)
M 206:4 Mid.decode - A (2)
M 230:4 Mid.encode - A (2)
C 262:0 Mpu - A (2)
M 280:4 Mpu.decode - A (2)
M 308:4 Umid.decode - A (2)
M 320:4 Umid.encode - A (2)
M 28:4 Upid.__init__ - A (1)
M 36:4 Upid.decode - A (1)
M 51:4 Upid.xml - A (1)
M 68:4 NoUpid.decode - A (1)
M 74:4 NoUpid.encode - A (1)
M 80:4 NoUpid.xml - A (1)
M 96:4 AirId.decode - A (1)
M 103:4 AirId.encode - A (1)
M 109:4 AirId.xml - A (1)
M 126:4 Atsc.decode - A (1)
M 140:4 Atsc.encode - A (1)
M 187:4 Isan.decode - A (1)
M 194:4 Isan.encode - A (1)
M 267:4 Mpu._decode_adfr - A (1)
M 292:4 Mpu.encode - A (1)
threefive/decode.py
F 27:0 _read_stuff - A (3)
F 43:0 decode - A (3)
threefive/encode.py
F 49:0 mk_splice_insert - A (3)
F 24:0 mk_time_signal - A (2)
F 12:0 mk_splice_null - A (1)
threefive/smoketest.py
F 33:0 smoke - A (4)
F 24:0 _decode_test - A (2)
threefive/stream.py
M 544:4 Stream._parse_scte35 - B (8)
M 568:4 Stream._parse_sdt - B (7)
M 332:4 Stream.show - B (6)
M 470:4 Stream._parse_tables - B (6)
M 625:4 Stream._parse_pmt - B (6)
M 220:4 Stream._find_start - A (5)
M 265:4 Stream.decode_fu - A (5)
M 278:4 Stream.decode_next - A (5)
M 352:4 Stream.show_pts - A (5)
M 497:4 Stream._parse - A (5)
M 250:4 Stream.decode - A (4)
M 317:4 Stream.proxy - A (4)
M 431:4 Stream._parse_pts - A (4)
M 604:4 Stream._parse_pat - A (4)
C 39:0 ProgramInfo - A (3)
M 53:4 ProgramInfo.show - A (3)
C 116:0 Stream - A (3)
M 405:4 Stream._unpad - A (3)
M 421:4 Stream._parse_cc - A (3)
M 514:4 Stream._same_as_last - A (3)
M 677:4 Stream._set_scte35_pids - A (3)
C 78:0 Pids - A (2)
C 96:0 Maps - A (2)
M 136:4 Stream.__init__ - A (2)
M 214:4 Stream._split_by_idx - A (2)
M 244:4 Stream._mk_pkts - A (2)
M 309:4 Stream.decode_start_time - A (2)
M 370:4 Stream.pid2prgm - A (2)
M 380:4 Stream.pid2pts - A (2)
M 390:4 Stream.pid2pcr - A (2)
M 400:4 Stream._unpad_afc - A (2)
M 449:4 Stream._parse_pcr - A (2)
M 459:4 Stream._parse_payload - A (2)
M 487:4 Stream._parse_info - A (2)
M 509:4 Stream._chk_partial - A (2)
M 521:4 Stream._section_incomplete - A (2)
M 528:4 Stream._parse_cue - A (2)
M 536:4 Stream._strip_scte35_pes - A (2)
M 652:4 Stream._parse_program_streams - A (2)
F 15:0 no_op - A (1)
F 23:0 show_cue - A (1)
F 31:0 show_cue_stderr - A (1)
M 46:4 ProgramInfo.__init__ - A (1)
M 86:4 Pids.__init__ - A (1)
M 106:4 Maps.__init__ - A (1)
M 160:4 Stream.__repr__ - A (1)
M 164:4 Stream.as_90k - A (1)
M 171:4 Stream._pusi_flag - A (1)
M 175:4 Stream._afc_flag - A (1)
M 179:4 Stream._pcr_flag - A (1)
M 183:4 Stream._spi_flag - A (1)
M 187:4 Stream._pts_flag - A (1)
M 192:4 Stream._parse_length - A (1)
M 199:4 Stream._parse_pid - A (1)
M 207:4 Stream._parse_program - A (1)
M 238:4 Stream.iter_pkts - A (1)
M 292:4 Stream.decode_program - A (1)
M 300:4 Stream.decode_pids - A (1)
M 364:4 Stream.pts - A (1)
M 414:4 Stream._mk_packet_data - A (1)
M 667:4 Stream._parse_stream_type - A (1)
threefive/commands.py
M 203:4 SpliceInsert.decode - A (5)
M 229:4 SpliceInsert.encode - A (5)
M 263:4 SpliceInsert.xml - A (5)
C 172:0 SpliceInsert - A (4)
M 143:4 TimeSignal._encode_splice_time - A (3)
M 295:4 SpliceInsert.from_xml - A (3)
C 10:0 SpliceCommand - A (2)
C 41:0 BandwidthReservation - A (2)
C 57:0 PrivateCommand - A (2)
C 90:0 SpliceNull - A (2)
C 101:0 TimeSignal - A (2)
M 131:4 TimeSignal._splice_time - A (2)
M 157:4 TimeSignal.xml - A (2)
M 167:4 TimeSignal.from_xml - A (2)
M 15:4 SpliceCommand.__init__ - A (1)
M 21:4 SpliceCommand.decode - A (1)
M 26:4 SpliceCommand._set_len - A (1)
M 33:4 SpliceCommand.encode - A (1)
M 46:4 BandwidthReservation.__init__ - A (1)
M 51:4 BandwidthReservation.decode - A (1)
M 62:4 PrivateCommand.__init__ - A (1)
M 69:4 PrivateCommand.decode - A (1)
M 80:4 PrivateCommand.encode - A (1)
M 95:4 SpliceNull.__init__ - A (1)
M 106:4 TimeSignal.__init__ - A (1)
M 113:4 TimeSignal.decode - A (1)
M 122:4 TimeSignal.encode - A (1)
M 177:4 SpliceInsert.__init__ - A (1)
M 194:4 SpliceInsert.decode_break_duration - A (1)
M 254:4 SpliceInsert.encode_break_duration - A (1)
threefive/xml.py
M 130:4 Node.mk - B (6)
F 26:0 un_xml - A (5)
M 217:4 XmlParser._mk_attrs - A (5)
F 42:0 iter_attrs - A (4)
F 17:0 un_camel - A (3)
F 53:0 val2xml - A (3)
C 82:0 Node - A (3)
M 116:4 Node.set_depth - A (3)
C 166:0 Comment - A (3)
C 174:0 XmlParser - A (3)
M 190:4 XmlParser._chk_node_list - A (3)
M 239:4 XmlParser._parse_nodes - A (3)
M 246:4 XmlParser._parse_most - A (3)
F 64:0 key2xml - A (2)
F 74:0 mk_xml_attrs - A (2)
M 104:4 Node.__init__ - A (2)
M 167:4 Comment.mk - A (2)
M 199:4 XmlParser._mk_value - A (2)
M 228:4 XmlParser.parse - A (2)
M 264:4 XmlParser._parse_descriptor - A (2)
F 8:0 t2s - A (1)
M 113:4 Node.__repr__ - A (1)
M 126:4 Node._get_indent - A (1)
M 153:4 Node.add_child - A (1)
M 159:4 Node.add_comment - A (1)
M 186:4 XmlParser.__init__ - A (1)
M 210:4 XmlParser._mk_active - A (1)
threefive/stuff.py
F 8:0 print2 - A (1)
threefive/cue.py
M 144:4 Cue._mk_bits - B (7)
M 103:4 Cue.get - A (5)
M 412:4 Cue.xml - A (5)
M 319:4 Cue.load_descriptors - A (4)
M 334:4 Cue.load - A (4)
M 366:4 Cue._xml_splice_command - A (4)
C 25:0 Cue - A (3)
M 89:4 Cue._descriptor_loop - A (3)
M 280:4 Cue._unloop_descriptors - A (3)
M 306:4 Cue.load_command - A (3)
M 374:4 Cue._xml_splice_descriptor - A (3)
M 387:4 Cue._xml_event_signal - A (3)
M 393:4 Cue.from_xml - A (3)
M 55:4 Cue.__init__ - A (2)
M 74:4 Cue.decode - A (2)
M 121:4 Cue.get_descriptors - A (2)
M 136:4 Cue.fix_bad_b64 - A (2)
M 173:4 Cue._mk_descriptors - A (2)
M 198:4 Cue._set_splice_command - A (2)
M 296:4 Cue.load_info_section - A (2)
M 361:4 Cue._xml_splice_info_section - A (2)
M 69:4 Cue.__repr__ - A (1)
M 128:4 Cue.get_json - A (1)
M 187:4 Cue.mk_info_section - A (1)
M 213:4 Cue.show - A (1)
M 221:4 Cue.encode - A (1)
M 245:4 Cue.encode_as_int - A (1)
M 252:4 Cue.encode2int - A (1)
M 258:4 Cue.encode_as_hex - A (1)
M 265:4 Cue.encode2hex - A (1)
M 272:4 Cue._encode_crc - A (1)
threefive/base.py
M 139:4 SCTE35Base.load - A (5)
M 26:4 SCTE35Base._chk_var - A (3)
M 87:4 SCTE35Base.kv_clean - A (3)
C 9:0 SCTE35Base - A (2)
M 21:4 SCTE35Base._chk_nbin - A (2)
M 54:4 SCTE35Base.as_hms - A (2)
M 105:4 SCTE35Base.has - A (2)
M 126:4 SCTE35Base.idxsplit - A (2)
M 17:4 SCTE35Base.__repr__ - A (1)
M 40:4 SCTE35Base.as_90k - A (1)
M 47:4 SCTE35Base.as_ticks - A (1)
M 68:4 SCTE35Base.fix_hex - A (1)
M 74:4 SCTE35Base.get - A (1)
M 80:4 SCTE35Base.get_json - A (1)
M 113:4 SCTE35Base.xml - A (1)
threefive/segment.py
M 119:4 Segment.decode - B (6)
M 57:4 Segment.__init__ - A (4)
C 16:0 Segment - A (3)
M 109:4 Segment.show_cue - A (2)
M 77:4 Segment.__repr__ - A (1)
M 80:4 Segment._mk_tmp - A (1)
M 84:4 Segment._aes_get_key - A (1)
M 88:4 Segment._aes_decrypt - A (1)
M 95:4 Segment._add_cue - A (1)
M 102:4 Segment.shushed - A (1)
threefive/bitn.py
C 8:0 BitBin - A (2)
M 29:4 BitBin.as_int - A (2)
M 47:4 BitBin.as_charset - A (2)
C 93:0 NBin - A (2)
M 127:4 NBin.add_int - A (2)
M 145:4 NBin.add_hex - A (2)
M 168:4 NBin.reserve - A (2)
M 185:4 NBin.zeroed - A (2)
M 16:4 BitBin.__init__ - A (1)
M 21:4 BitBin.as_90k - A (1)
M 39:4 BitBin.as_hex - A (1)
M 62:4 BitBin.as_bytes - A (1)
M 71:4 BitBin.as_flag - A (1)
M 77:4 BitBin.forward - A (1)
M 84:4 BitBin.negative_shift - A (1)
M 101:4 NBin.__init__ - A (1)
M 106:4 NBin.nbits2bites - A (1)
M 117:4 NBin.add_bites - A (1)
M 136:4 NBin.add_90k - A (1)
M 159:4 NBin.add_flag - A (1)
M 179:4 NBin.forward - A (1)
threefive/descriptors.py
M 469:4 SegmentationDescriptor.xml - B (6)
M 516:4 SegmentationDescriptor.from_xml - A (5)
M 69:4 SpliceDescriptor.encode - A (4)
F 12:0 k_by_v - A (3)
C 22:0 SpliceDescriptor - A (3)
C 299:0 SegmentationDescriptor - A (3)
M 367:4 SegmentationDescriptor._decode_segmentation - A (3)
M 380:4 SegmentationDescriptor._chk_sub_segments - A (3)
M 458:4 SegmentationDescriptor._encode_segments - A (3)
F 551:0 splice_descriptor - A (2)
M 39:4 SpliceDescriptor.parse_tag_and_len - A (2)
M 50:4 SpliceDescriptor.parse_id - A (2)
M 61:4 SpliceDescriptor.decode - A (2)
C 92:0 DVBDASDescriptor - A (2)
M 111:4 DVBDASDescriptor.decode - A (2)
C 142:0 AvailDescriptor - A (2)
M 176:4 AvailDescriptor.from_xml - A (2)
C 184:0 DtmfDescriptor - A (2)
M 207:4 DtmfDescriptor.encode - A (2)
M 234:4 DtmfDescriptor.from_xml - A (2)
C 244:0 TimeDescriptor - A (2)
M 291:4 TimeDescriptor.from_xml - A (2)
M 342:4 SegmentationDescriptor.decode - A (2)
M 355:4 SegmentationDescriptor._decode_flags - A (2)
M 389:4 SegmentationDescriptor._decode_segments - A (2)
M 401:4 SegmentationDescriptor.encode - A (2)
M 419:4 SegmentationDescriptor._encode_flags - A (2)
M 432:4 SegmentationDescriptor.mk_the_upid - A (2)
M 446:4 SegmentationDescriptor._encode_segmentation - A (2)
M 29:4 SpliceDescriptor.__init__ - A (1)
M 83:4 SpliceDescriptor._encode_id - A (1)
M 97:4 DVBDASDescriptor.__init__ - A (1)
M 128:4 DVBDASDescriptor.encode - A (1)
M 147:4 AvailDescriptor.__init__ - A (1)
M 154:4 AvailDescriptor.decode - A (1)
M 161:4 AvailDescriptor.encode - A (1)
M 169:4 AvailDescriptor.xml - A (1)
M 189:4 DtmfDescriptor.__init__ - A (1)
M 198:4 DtmfDescriptor.decode - A (1)
M 221:4 DtmfDescriptor.xml - A (1)
M 249:4 TimeDescriptor.__init__ - A (1)
M 258:4 TimeDescriptor.decode - A (1)
M 267:4 TimeDescriptor.encode - A (1)
M 277:4 TimeDescriptor.xml - A (1)
M 315:4 SegmentationDescriptor.__init__ - A (1)
threefive/streamtypes.py
F 105:0 add_stream_types - A (2)
F 116:0 mk_streamtype_map - A (2)
F 98:0 hex_literal - A (1)
threefive/crc.py
F 16:0 _bytecrc - A (2)
F 25:0 _mk_table - A (2)
F 31:0 crc32 - A (2)
F 44:0 crc32hex - A (1)
threefive/section.py
M 116:4 SpliceInfoSection._encode_encrypted - A (3)
M 150:4 SpliceInfoSection._encode_splice_command - A (3)
M 196:4 SpliceInfoSection.from_xml - A (3)
C 20:0 SpliceInfoSection - A (2)
M 45:4 SpliceInfoSection.decode - A (2)
M 91:4 SpliceInfoSection._encode_sap - A (2)
M 100:4 SpliceInfoSection._encode_section_length - A (2)
M 108:4 SpliceInfoSection._encode_protocol_version - A (2)
M 134:4 SpliceInfoSection._encode_cw_index - A (2)
M 142:4 SpliceInfoSection._encode_tier - A (2)
M 26:4 SpliceInfoSection.__init__ - A (1)
M 70:4 SpliceInfoSection._encode_table_id - A (1)
M 77:4 SpliceInfoSection._encode_section_syntax_indicator - A (1)
M 84:4 SpliceInfoSection._encode_private_flag - A (1)
M 128:4 SpliceInfoSection._encode_pts_adjustment - A (1)
M 162:4 SpliceInfoSection.encode - A (1)
M 182:4 SpliceInfoSection.xml - A (1)
309 blocks (classes, functions, methods) analyzed.
Average complexity: A (2.087378640776699) <------Boom goes the dynamite.,
a@fu:~/build/SCTE35_threefive$ That's a sweet score python 3.11 scored : A (3.076061694485527) . We beat python. |
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On Hex: You're right about the attributes , but wrong about the values. we can use hex in the xml value, like for UPIDs. xsd: Schema says unsignedByte in an attribute cannot be hex or octal |
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Correct. For the UPID value, what's valid will depend on the format specified. Currently this is There are a few examples in other specs (SCTE224, ESAM), open source projects (scte35-go) and various services outputting/ingesting this stuff (eg AWS Media Services), but you are right that there are no canonical examples in any spec, other than Table 22. |
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@davemevans I don't think that format going to used much , but let's do text for safety. |
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@davemevans , the only upids without a text representation in table 22 are ATSC, and type 1. |
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We need a hard target for the next release. I think Dash is not clear, the info is spread out every, and I'm tired of guessing. What we can do , fairly easily, is meet the SCTE-35 XML spec, so let's finish that up, cool? It's on the way to DASH anyway. If there is something you want to work on, just call it. If you got a question, just ask it. Everybody Cue, InfoSection, all the SpliceCommands, all the Descriptors, and all the UPIDS need a xml() method that returns a Node Instance and a from_xml(stuff) that loads from the dict stuff. |
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@davemevans they mention timestamps in ID3tags for TimeDescriptors, I've just about finished that. |
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I'm just about done with encryption too. |
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upids with verified working xml()
|
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This is looking awesome - almost there! One thing I noticed is that MID didn't quite work properly since it dumps the contained upids directly with incorrect attrs, whereas it should call the underlying upid.xml(). That's an easy enough fix - can PR that later. When calling Cue.from_xml, I found that when you have a MID in XML and want to |
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@davemevans , you got to shorten these names up , unescape_special_chars, you sound like a damn dot Net programmer :) unescape and escape or something is fine by me , I mean most of my vars are named "stuff" or "data", |
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After we do this release, I want to fold XmlParser into Node. Look at these methods, it all lines up
def mk_active(self, node): #Node.name
def mk_value(self, value, stuff): # Node.value
def mk_attrs(self, node): # Node.attrsinstead passing the stuff dict to SpliceInfoSection, we should pass a Node instance. SpliceInfoSections currently loads stuff['SpliceInfoSection"], Does that make sense? |
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Yeah, makes total sense - love it. |
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Have you ever look at cuei, my other SCTE-35 parser in Go? https://github.com/futzu/cuei/blob/0a62872963adccb57004e29d06718dd13c0b4fa4/commands.go I feel like was the best way to do it. I feel like that's the approach we should be using. However this OO, we need more classes. Every xml Node that we use , should have a class. XmlSpliceInsert This not just displaying the data in a different format, this is different data. I think XmlSpliceInsert and SpliceInsert should marshal into each other . |
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The Xml Types in the xsd should be classes in threefive. |
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This is why we aren't using etree. |
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@davemevans I'm going to do release on Wednesday I think.as long as what is working is stable, even if some of the UPIDs are not complete. |
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Did you see fixsix, it works pretty well, but the code is kind of clunky.
|
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Upids: with a working from_xml() and xml() 0x0 : No Upid
0x1 : Deprecated
0x2: Deprecated
0x3 : AdID
0x4 : UMID
0x6 : ISAN
0x7 : TID
0x8 : AiringID
0x9 : ADI
0xa : EIDR
0xe : ADS Info
0xf : URIUPIDS with just a working xml() 0xb : ATSC
0xc : MPU
0xd : MIDI am okay with that for this release. |
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I have 45 GB worth of mpegts I use for testing. They are from ABC, Disney, CBS, CNN, MsNBC, NBC, NewMax and a few more sources. They contain: 665 upids:
|
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Worth noting many of the from_xml only appear to work because the XML output from threefive has the non-standard segmentationUpidLength attribute included. I would agree that this is ok for this release, but in the long term this would need addressing. Maybe worth opening a tracking issue. |
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0,3,4,7,9,10,14,15 all work without length. |
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Now, 0,1,2,3,4,5,6,7,8,9,10,14,15 all work without length |
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"Worth noting many of the from_xml only appear to work because the XML output from threefive has the non-standard segmentationUpidLength attribute included." said Dave. You got in my head with that one, I added length to the upid_map for all the upids with fixed sizes, and for the ones that are variable length, I am grabbing the length after we load the xml and call encode. Now, we don't need length in xml, and I think I took them all out. |
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Howw about you tune xml.py ? cyclomatic complexity needs to be closer to 2 , do what you can, don't let it make you crazy. pylint score needs to be over 9.75 python3 -mpip install radon
a@fu:~/build/SCTE35_threefive$ radon cc -sa threefive/xml.py threefive/xml.py
M 160:4 Node.mk - B (6)
F 26:0 un_xml - A (5)
M 248:4 XmlParser.mk_attrs - A (5)
F 42:0 iter_attrs - A (4)
M 271:4 XmlParser._parse_nodes - A (4)
F 17:0 un_camel - A (3)
F 53:0 val2xml - A (3)
F 90:0 escape - A (3)
F 101:0 unescape - A (3)
C 112:0 Node - A (3)
M 146:4 Node.set_depth - A (3)
C 195:0 Comment - A (3)
C 204:0 XmlParser - A (3)
M 220:4 XmlParser.chk_node_list - A (3)
M 280:4 XmlParser._parse_most - A (3)
F 64:0 key2xml - A (2)
F 74:0 mk_xml_attrs - A (2)
M 134:4 Node.__init__ - A (2)
M 196:4 Comment.mk - A (2)
M 229:4 XmlParser.mk_value - A (2)
M 260:4 XmlParser.parse - A (2)
M 299:4 XmlParser._parse_descriptor - A (2)
F 8:0 t2s - A (1)
M 143:4 Node.__repr__ - A (1)
M 156:4 Node.get_indent - A (1)
M 183:4 Node.add_child - A (1)
M 189:4 Node.add_comment - A (1)
M 216:4 XmlParser.__init__ - A (1)
M 241:4 XmlParser.mk_active - A (1)
M 315:4 XmlParser._skip_comment - A (1)
30 blocks (classes, functions, methods) analyzed.
Average complexity: A (2.533333333333333)
a@fu:~/build/SCTE35_threefive$ pylint threefive/xml.py************* Module threefive.xml
threefive/xml.py:134:4: W0102: Dangerous default value {} as argument (dangerous-default-value) # <---- I don't care about these
threefive/xml.py:156:4: C0116: Missing function or method docstring (missing-function-docstring)
threefive/xml.py:195:0: C0115: Missing class docstring (missing-class-docstring)
threefive/xml.py:204:0: C0115: Missing class docstring (missing-class-docstring)
threefive/xml.py:248:4: R1710: Either all return statements in a function should return an expression, or none of them should. (inconsistent-return-statements)
threefive/xml.py:308:8: W0702: No exception type(s) specified (bare-except) # <---- I don't care about these
------------------------------------------------------------------
Your code has been rated at 9.61/10 (previous run: 9.42/10, +0.19) |
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Yes, happy to take a crack at this. But it won't be til tomorrow morning now. |
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no rush. |
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@davemevans in XmlParser.mkattrs Just call unescape on the whole node, def mk_attrs(self, node):
"""
mk_attrs parses the current node for attributes
and stores them in self.stuff[self.active]
"""
if "<!--" not in unescape(node): # <---- Call unescape on on the whole node
attrs = [x for x in node.split(" ") if "=" in x]
parsed = {
x.split('="')[0]: x.split('="')[1].split('"')[0] # <----- You're call it here and in mk_value
for x in attrs
}
it = iter_attrs(parsed)
return itIt's way more efficient to call it on the whole thing. |
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It would be more efficient, but parsing would then fail for attributes that contain |
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i got a hex fix for section.py that cleans up so other stuff I did earlier too. in xml.py val2xml will handle hex to int conversion, |
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@davemevans when you have a minute, Read the README and and see if the xml stuff makes sense, please. |
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Yeah, that's annoying. The spec is clear that you derive the length after converting the XML representation to bitstream format, so the measuring should be done after encoding back to the native format. This is fine for now, but probably a more complete solution for parsing from XML is needed for the future. Worth opening an issue to cover this and come to it later. I have a list of other things that need addressing down the line - where would be the best place to log these - GH issues? This discussion? New discussion? |
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I got all the UPID stuff sorted, everything is working.
<EventStream
schemeIdUri="urn:scte:scte35:2014:xml+bin"
timescale="1000">
<!-- 2024-09-10T05:33:47.520000Z - 2024-09-10T05:34:25.920000Z -->
<Event
presentationTime="1725946427520"
duration="38400"
id="14268737">
<Signal
xmlns="http://www.scte.org/schemas/35/2016">
<Binary>/DAgAAAAAAAAAP/wDwUA2blBf//+ADS8AMAAAAAAAORhJCQ=</Binary>
</Signal>
</Event>
<!-- 2024-09-10T05:39:50.400000Z - 2024-09-10T05:40:28.800000Z -->
</EventStream>from threefive import Cue
cue = Cue()
cue.load(data)
cue.show(){
"info_section": {
"table_id": "0xfc",
"section_syntax_indicator": false,
"private": false,
"sap_type": "0x03",
"sap_details": "No Sap Type",
"section_length": 32,
"protocol_version": 0,
"encrypted_packet": false,
"encryption_algorithm": 0,
"pts_adjustment": 0.0,
"cw_index": "0x00",
"tier": "0x0fff",
"splice_command_length": 15,
"splice_command_type": 5,
"descriptor_loop_length": 0,
"crc": "0x961b236d"
},
"command": {
"command_length": 15,
"command_type": 5,
"name": "Splice Insert",
"break_auto_return": true,
"break_duration": 38.4,
"splice_event_id": 14268737,
"splice_event_cancel_indicator": false,
"out_of_network_indicator": true,
"program_splice_flag": true,
"duration_flag": true,
"splice_immediate_flag": true,
"event_id_compliance_flag": true,
"unique_program_id": 49152,
"avail_num": 0,
"avails_expected": 0
},
"descriptors": [],
"dash_data": {
"EventStream": {
"scheme_id_uri": "urn:scte:scte35:2014:xml+bin",
"timescale": 1000
},
"Event": {
"presentation_time": 1725946427520,
"duration": 0.426667,
"id": 14268737
},
"Signal": {
"xmlns": "http://www.scte.org/schemas/35/2016"
},
"Binary": {
"binary": "/DAgAAAAAAAAAP/wDwUA2blBf//+ADS8AMAAAAAAAORhJCQ="
}
}
} |
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XML representation of cues is part of SCTE35 so I think it is reasonable for parsing from and serialising to a SpliceInfoSection to be in scope for a SCTE35-specific parser. Regardless, thanks for your efforts on this up to this point - it's genuinely much appreciated. |
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@davemevans I'm not following you man, how is it not doing that? >>>> from threefive import Cue
>>>> more_xml = """<Period start="PT444334H55M0.010S" id="break-1">
.... <EventStream timescale="90000" schemeIdUri="urn:scte:scte35:2013:xml">
.... <Event duration="540">
.... <scte35:SpliceInfoSection protocolVersion="0" ptsAdjustment="140429" tier="4095">
.... <scte35:SpliceInsert spliceEventId="11" spliceEventCancelIndicator="false" outOfNetworkIndicator="true" spliceImmediateFlag="true" uniqueProgramId="1"availNum="1" availsExpected="1">
.... <scte35:Program><scte35:SpliceTime ptsTime="5272624400"/></scte35:Program>
.... <scte35:BreakDuration autoReturn="true" duration="9450000"/>
.... </scte35:SpliceInsert>
.... </scte35:SpliceInfoSection>
.... </Event>
.... </EventStream>
.... </Period>
.... """
>>>> cue=Cue()
>>>> cue.load(more_xml)
True
>>>> print(cue.xml())
<SpliceInfoSection xmlns="https://scte.org/schemas/35" ptsAdjustment="140429" protocolVersion="0" sapType="3" tier="4095">
<SpliceInsert spliceEventId="11" spliceEventCancelIndicator="false" spliceImmediateFlag="true" eventIdComplianceFlag="true" availNum="1" availsExpected="true" outOfNetworkIndicator="true" uniqueProgramId="1">
<Program>
<SpliceTime ptsTime="5272624400"/>
</Program>
<BreakDuration autoReturn="true" duration="9450000"/>
</SpliceInsert>
</SpliceInfoSection> |
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I can even modify the cue >>>> ad=AvailDescriptor()
>>>> ad.provider_avail_id = 0x1234567
>>>> cue.descriptors.append(ad)
>>>> cue.encode()
'/DBHAAGRZOeYAP/wBQb+jzHOMAAxAiVDVUVJAAAAAX+/ARRtc25iY19FUDA0MzExMjIxMDU1NzYBAQAAAAhDVUVJASNFZ/rzHLQ='
>>>> print(cue.xml())
<SpliceInfoSection xmlns="https://scte.org/schemas/35" ptsAdjustment="6734276504" protocolVersion="0" sapType="3" tier="4095">
<TimeSignal>
<SpliceTime ptsTime="2402405936"/>
</TimeSignal>
<!-- Distributor Placement Opportunity Start -->
<SegmentationDescriptor segmentationEventId="1" segmentationEventCancelIndicator="false" segmentationEventIdComplianceIndicator="true" segmentationTypeId="54" segmentNum="1" segmentsExpected="1" subSegmentNum="0" subSegmentsExpected="0">
<!-- UPID: Deprecated -->
<SegmentationUpid segmentationUpidType="1" segmentationUpidFormat="hexbinary">msnbc_EP043112210557</SegmentationUpid>
</SegmentationDescriptor>
<AvailDescriptor providerAvailId="19088743"/>
</SpliceInfoSection>
>>>> print it as json >>>> cue.show()
{
"info_section": {
"table_id": "0xfc",
"section_syntax_indicator": false,
"private": false,
"sap_type": "0x03",
"sap_details": "No Sap Type",
"section_length": 71,
"protocol_version": 0,
"encrypted_packet": false,
"encryption_algorithm": 0,
"pts_adjustment": 74825.294489,
"cw_index": "0x0",
"tier": 4095,
"splice_command_length": 5,
"splice_command_type": 6,
"descriptor_loop_length": 49,
"crc": "0xfaf31cb4"
},
"command": {
"command_length": 5,
"command_type": 6,
"name": "Time Signal",
"time_specified_flag": true,
"pts_time": 26693.399289
},
"descriptors": [
{
"tag": 2,
"descriptor_length": 37,
"name": "Segmentation Descriptor",
"identifier": "CUEI",
"segmentation_event_id": "0x1",
"segmentation_event_cancel_indicator": false,
"segmentation_event_id_compliance_indicator": true,
"program_segmentation_flag": true,
"segmentation_duration_flag": false,
"delivery_not_restricted_flag": true,
"segmentation_duration": 60.033333,
"segmentation_message": "Distributor Placement Opportunity Start",
"segmentation_upid_type": 1,
"segmentation_upid_type_name": "Deprecated",
"segmentation_upid_length": 20,
"segmentation_upid": "msnbc_EP043112210557",
"segmentation_type_id": 54,
"segment_num": 1,
"segments_expected": 1,
"sub_segment_num": 0,
"sub_segments_expected": 0
},
{
"tag": 0,
"descriptor_length": 8,
"name": "Avail Descriptor",
"identifier": "CUEI",
"provider_avail_id": 19088743
}
]
}
>>>> the cli tool can convert from xml to base64,bytes, int, hex, json and vice versa. It will output xml when you parse mpegts. What does it not do ? |
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@davemevans @wabiloo I can parse mpd filles over the network and convert the data to cues, no problem. a@fu:~/build/SCTE35_threefive$ pypy3 mpdp.py https://demo.unified-streaming.com/k8s/live/stable/scte35-no-splicing.isml/.mpd
{
"info_section": {
"table_id": "0xfc",
"section_syntax_indicator": false,
"private": false,
"sap_type": "0x03",
"sap_details": "No Sap Type",
"section_length": 32,
"protocol_version": 0,
"encrypted_packet": false,
"encryption_algorithm": 0,
"pts_adjustment": 0.0,
"cw_index": "0x00",
"tier": "0x0fff",
"splice_command_length": 15,
"splice_command_type": 5,
"descriptor_loop_length": 0,
"crc": "0xe4612424"
},
"command": {
"command_length": 15,
"command_type": 5,
"name": "Splice Insert",
"break_auto_return": true,
"break_duration": 38.4,
"splice_event_id": 14294827,
"splice_event_cancel_indicator": false,
"out_of_network_indicator": true,
"program_splice_flag": true,
"duration_flag": true,
"splice_immediate_flag": true,
"event_id_compliance_flag": true,
"unique_program_id": 49152,
"avail_num": 0,
"avails_expected": 0
},
"descriptors": []
}
{
"info_section": {
"table_id": "0xfc",
"section_syntax_indicator": false,
"private": false,
"sap_type": "0x03",
"sap_details": "No Sap Type",
"section_length": 32,
"protocol_version": 0,
"encrypted_packet": false,
"encryption_algorithm": 0,
"pts_adjustment": 0.0,
"cw_index": "0x00",
"tier": "0x0fff",
"splice_command_length": 15,
"splice_command_type": 5,
"descriptor_loop_length": 0,
"crc": "0xe4612424"
},
"command": {
"command_length": 15,
"command_type": 5,
"name": "Splice Insert",
"break_auto_return": true,
"break_duration": 38.4,
"splice_event_id": 14294828,
"splice_event_cancel_indicator": false,
"out_of_network_indicator": true,
"program_splice_flag": true,
"duration_flag": true,
"splice_immediate_flag": true,
"event_id_compliance_flag": true,
"unique_program_id": 49152,
"avail_num": 0,
"avails_expected": 0
},
"descriptors": []
}
{
"info_section": {
"table_id": "0xfc",
"section_syntax_indicator": false,
"private": false,
"sap_type": "0x03",
"sap_details": "No Sap Type",
"section_length": 32,
"protocol_version": 0,
"encrypted_packet": false,
"encryption_algorithm": 0,
"pts_adjustment": 0.0,
"cw_index": "0x00",
"tier": "0x0fff",
"splice_command_length": 15,
"splice_command_type": 5,
"descriptor_loop_length": 0,
"crc": "0xe4612424"
},
"command": {
"command_length": 15,
"command_type": 5,
"name": "Splice Insert",
"break_auto_return": true,
"break_duration": 38.4,
"splice_event_id": 14294829,
"splice_event_cancel_indicator": false,
"out_of_network_indicator": true,
"program_splice_flag": true,
"duration_flag": true,
"splice_immediate_flag": true,
"event_id_compliance_flag": true,
"unique_program_id": 49152,
"avail_num": 0,
"avails_expected": 0
},
"descriptors": []
}
{
"info_section": {
"table_id": "0xfc",
"section_syntax_indicator": false,
"private": false,
"sap_type": "0x03",
"sap_details": "No Sap Type",
"section_length": 32,
"protocol_version": 0,
"encrypted_packet": false,
"encryption_algorithm": 0,
"pts_adjustment": 0.0,
"cw_index": "0x00",
"tier": "0x0fff",
"splice_command_length": 15,
"splice_command_type": 5,
"descriptor_loop_length": 0,
"crc": "0xe4612424"
},
"command": {
"command_length": 15,
"command_type": 5,
"name": "Splice Insert",
"break_auto_return": true,
"break_duration": 38.4,
"splice_event_id": 14294830,
"splice_event_cancel_indicator": false,
"out_of_network_indicator": true,
"program_splice_flag": true,
"duration_flag": true,
"splice_immediate_flag": true,
"event_id_compliance_flag": true,
"unique_program_id": 49152,
"avail_num": 0,
"avails_expected": 0
},
"descriptors": []
}
{
"info_section": {
"table_id": "0xfc",
"section_syntax_indicator": false,
"private": false,
"sap_type": "0x03",
"sap_details": "No Sap Type",
"section_length": 32,
"protocol_version": 0,
"encrypted_packet": false,
"encryption_algorithm": 0,
"pts_adjustment": 0.0,
"cw_index": "0x00",
"tier": "0x0fff",
"splice_command_length": 15,
"splice_command_type": 5,
"descriptor_loop_length": 0,
"crc": "0xe4612424"
},
"command": {
"command_length": 15,
"command_type": 5,
"name": "Splice Insert",
"break_auto_return": true,
"break_duration": 38.4,
"splice_event_id": 14294831,
"splice_event_cancel_indicator": false,
"out_of_network_indicator": true,
"program_splice_flag": true,
"duration_flag": true,
"splice_immediate_flag": true,
"event_id_compliance_flag": true,
"unique_program_id": 49152,
"avail_num": 0,
"avails_expected": 0
},
"descriptors": [] |
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|
You can convert them to cues, and the convert the cues back to xml }
a@fu:~/build/SCTE35_threefive$ pypy3 mpdp.py https://demo.unified-streaming.com/k8s/live/stable/scte35-no-splicing.isml/.mpd
{
"info_section": {
"table_id": "0xfc",
"section_syntax_indicator": false,
"private": false,
"sap_type": "0x03",
"sap_details": "No Sap Type",
"section_length": 32,
"protocol_version": 0,
"encrypted_packet": false,
"encryption_algorithm": 0,
"pts_adjustment": 0.0,
"cw_index": "0x00",
"tier": "0x0fff",
"splice_command_length": 15,
"splice_command_type": 5,
"descriptor_loop_length": 0,
"crc": "0xe4612424"
},
"command": {
"command_length": 15,
"command_type": 5,
"name": "Splice Insert",
"break_auto_return": true,
"break_duration": 38.4,
"splice_event_id": 14294830,
"splice_event_cancel_indicator": false,
"out_of_network_indicator": true,
"program_splice_flag": true,
"duration_flag": true,
"splice_immediate_flag": true,
"event_id_compliance_flag": true,
"unique_program_id": 49152,
"avail_num": 0,
"avails_expected": 0
},
"descriptors": []
}
<SpliceInfoSection xmlns="https://scte.org/schemas/35" ptsAdjustment="0" protocolVersion="0" sapType="3" tier="4095">
<SpliceInsert spliceEventId="14294830" spliceEventCancelIndicator="false" spliceImmediateFlag="true" eventIdComplianceFlag="true" availNum="0" availsExpected="0" outOfNetworkIndicator="true" uniqueProgramId="49152">
<BreakDuration autoReturn="true" duration="3456000"/>
</SpliceInsert>
</SpliceInfoSection>
{
"info_section": {
"table_id": "0xfc",
"section_syntax_indicator": false,
"private": false,
"sap_type": "0x03",
"sap_details": "No Sap Type",
"section_length": 32,
"protocol_version": 0,
"encrypted_packet": false,
"encryption_algorithm": 0,
"pts_adjustment": 0.0,
"cw_index": "0x00",
"tier": "0x0fff",
"splice_command_length": 15,
"splice_command_type": 5,
"descriptor_loop_length": 0,
"crc": "0xe4612424"
},
"command": {
"command_length": 15,
"command_type": 5,
"name": "Splice Insert",
"break_auto_return": true,
"break_duration": 38.4,
"splice_event_id": 14294831,
"splice_event_cancel_indicator": false,
"out_of_network_indicator": true,
"program_splice_flag": true,
"duration_flag": true,
"splice_immediate_flag": true,
"event_id_compliance_flag": true,
"unique_program_id": 49152,
"avail_num": 0,
"avails_expected": 0
},
"descriptors": []
}
<SpliceInfoSection xmlns="https://scte.org/schemas/35" ptsAdjustment="0" protocolVersion="0" sapType="3" tier="4095">
<SpliceInsert spliceEventId="14294831" spliceEventCancelIndicator="false" spliceImmediateFlag="true" eventIdComplianceFlag="true" availNum="0" availsExpected="0" outOfNetworkIndicator="true" uniqueProgramId="49152">
<BreakDuration autoReturn="true" duration="3456000"/>
</SpliceInsert>
</SpliceInfoSection>
{
"info_section": {
"table_id": "0xfc",
"section_syntax_indicator": false,
"private": false,
"sap_type": "0x03",
"sap_details": "No Sap Type",
"section_length": 32,
"protocol_version": 0,
"encrypted_packet": false,
"encryption_algorithm": 0,
"pts_adjustment": 0.0,
"cw_index": "0x00",
"tier": "0x0fff",
"splice_command_length": 15,
"splice_command_type": 5,
"descriptor_loop_length": 0,
"crc": "0xe4612424"
},
"command": {
"command_length": 15,
"command_type": 5,
"name": "Splice Insert",
"break_auto_return": true,
"break_duration": 38.4,
"splice_event_id": 14294832,
"splice_event_cancel_indicator": false,
"out_of_network_indicator": true,
"program_splice_flag": true,
"duration_flag": true,
"splice_immediate_flag": true,
"event_id_compliance_flag": true,
"unique_program_id": 49152,
"avail_num": 0,
"avails_expected": 0
},
"descriptors": []
}
<SpliceInfoSection xmlns="https://scte.org/schemas/35" ptsAdjustment="0" protocolVersion="0" sapType="3" tier="4095">
<SpliceInsert spliceEventId="14294832" spliceEventCancelIndicator="false" spliceImmediateFlag="true" eventIdComplianceFlag="true" availNum="0" availsExpected="0" outOfNetworkIndicator="true" uniqueProgramId="49152">
<BreakDuration autoReturn="true" duration="3456000"/>
</SpliceInsert>
</SpliceInfoSection>
{
"info_section": {
"table_id": "0xfc",
"section_syntax_indicator": false,
"private": false,
"sap_type": "0x03",
"sap_details": "No Sap Type",
"section_length": 32,
"protocol_version": 0,
"encrypted_packet": false,
"encryption_algorithm": 0,
"pts_adjustment": 0.0,
"cw_index": "0x00",
"tier": "0x0fff",
"splice_command_length": 15,
"splice_command_type": 5,
"descriptor_loop_length": 0,
"crc": "0xe4612424"
},
"command": {
"command_length": 15,
"command_type": 5,
"name": "Splice Insert",
"break_auto_return": true,
"break_duration": 38.4,
"splice_event_id": 14294833,
"splice_event_cancel_indicator": false,
"out_of_network_indicator": true,
"program_splice_flag": true,
"duration_flag": true,
"splice_immediate_flag": true,
"event_id_compliance_flag": true,
"unique_program_id": 49152,
"avail_num": 0,
"avails_expected": 0
},
"descriptors": []
}
<SpliceInfoSection xmlns="https://scte.org/schemas/35" ptsAdjustment="0" protocolVersion="0" sapType="3" tier="4095">
<SpliceInsert spliceEventId="14294833" spliceEventCancelIndicator="false" spliceImmediateFlag="true" eventIdComplianceFlag="true" availNum="0" availsExpected="0" outOfNetworkIndicator="true" uniqueProgramId="49152">
<BreakDuration autoReturn="true" duration="3456000"/>
</SpliceInsert>
</SpliceInfoSection>
{
"info_section": {
"table_id": "0xfc",
"section_syntax_indicator": false,
"private": false,
"sap_type": "0x03",
"sap_details": "No Sap Type",
"section_length": 32,
"protocol_version": 0,
"encrypted_packet": false,
"encryption_algorithm": 0,
"pts_adjustment": 0.0,
"cw_index": "0x00",
"tier": "0x0fff",
"splice_command_length": 15,
"splice_command_type": 5,
"descriptor_loop_length": 0,
"crc": "0xe4612424"
},
"command": {
"command_length": 15,
"command_type": 5,
"name": "Splice Insert",
"break_auto_return": true,
"break_duration": 38.4,
"splice_event_id": 14294834,
"splice_event_cancel_indicator": false,
"out_of_network_indicator": true,
"program_splice_flag": true,
"duration_flag": true,
"splice_immediate_flag": true,
"event_id_compliance_flag": true,
"unique_program_id": 49152,
"avail_num": 0,
"avails_expected": 0
},
"descriptors": []
}
<SpliceInfoSection xmlns="https://scte.org/schemas/35" ptsAdjustment="0" protocolVersion="0" sapType="3" tier="4095">
<SpliceInsert spliceEventId="14294834" spliceEventCancelIndicator="false" spliceImmediateFlag="true" eventIdComplianceFlag="true" availNum="0" availsExpected="0" outOfNetworkIndicator="true" uniqueProgramId="49152">
<BreakDuration autoReturn="true" duration="3456000"/>
</SpliceInsert>
</SpliceInfoSection>
a@fu:~/build/SCTE35_threefive$ |
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For info, I found a small issue with the xml encode functionality, when using UPIDs - #123 |
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Starting a little thread about namespace.
Namespaces are one of the best things in XML, and yet one of the most misunderstood ones... First issue: there is more than one namespace for SCTE35. The spec (SCTE35_2023r1) says it should be "http://www.scte.org/schemas/35" Therefore in my (idealistic) view, when converting to xml (with
<SpliceInfoSection xmlns="https://scte.org/schemas/35" ptsAdjustment="0" protocolVersion="0" sapType="3" tier="4095">
<SpliceInsert spliceEventId="14294834" spliceEventCancelIndicator="false" spliceImmediateFlag="true" eventIdComplianceFlag="true" availNum="0" availsExpected="0" outOfNetworkIndicator="true" uniqueProgramId="49152">
<BreakDuration autoReturn="true" duration="3456000"/>
</SpliceInsert>
</SpliceInfoSection>
<SpliceInfoSection xmlns="https://scte.org/schemas/35/2016" ptsAdjustment="0" protocolVersion="0" sapType="3" tier="4095">
<SpliceInsert spliceEventId="14294834" spliceEventCancelIndicator="false" spliceImmediateFlag="true" eventIdComplianceFlag="true" availNum="0" availsExpected="0" outOfNetworkIndicator="true" uniqueProgramId="49152">
<BreakDuration autoReturn="true" duration="3456000"/>
</SpliceInsert>
</SpliceInfoSection>
<SpliceInfoSection ptsAdjustment="0" protocolVersion="0" sapType="3" tier="4095">
<SpliceInsert spliceEventId="14294834" spliceEventCancelIndicator="false" spliceImmediateFlag="true" eventIdComplianceFlag="true" availNum="0" availsExpected="0" outOfNetworkIndicator="true" uniqueProgramId="49152">
<BreakDuration autoReturn="true" duration="3456000"/>
</SpliceInsert>
</SpliceInfoSection>Also fine by me if case 3 (no namespace) is the default, leaving the user to use the After that - as @davemevans said - it fundamentally becomes the responsibility of the developer who wants to take that payload and insert it into a larger document (say: in an MPEG-DASH presentation aka MPD) to do the "right" thing, which is to say not treat it as if it's a text file, but instead use a proper XML writer, which will ensure that it's inserted in the correct way, either as: <MPD>
<!-- ... --->
<EventStream timescale="90000" schemeIdUri="urn:scte:scte35:2013:xml">
<Event>
<SpliceInfoSection xmlns="https://scte.org/schemas/35" ptsAdjustment="0" protocolVersion="0" sapType="3" tier="4095">
<SpliceInsert spliceEventId="14294834" spliceEventCancelIndicator="false" spliceImmediateFlag="true" eventIdComplianceFlag="true" availNum="0" availsExpected="0" outOfNetworkIndicator="true" uniqueProgramId="49152">
<BreakDuration autoReturn="true" duration="3456000"/>
</SpliceInsert>
</SpliceInfoSection>
</Event>
</EventStream>
<!--... --->
</MPD>or as <MPD xmlns:scte35="https://scte.org/schemas/35" >
<!-- ... --->
<EventStream timescale="90000" schemeIdUri="urn:scte:scte35:2013:xml">
<Event>
<scte35:SpliceInfoSection ptsAdjustment="0" protocolVersion="0" sapType="3" tier="4095">
<scte35:SpliceInsert spliceEventId="14294834" spliceEventCancelIndicator="false" spliceImmediateFlag="true" eventIdComplianceFlag="true" availNum="0" availsExpected="0" outOfNetworkIndicator="true" uniqueProgramId="49152">
<scte35:BreakDuration autoReturn="true" duration="3456000"/>
</scte35:SpliceInsert>
</scte35:SpliceInfoSection>
</Event>
</EventStream>
<!--... --->
</MPD>or any other form that is valid XML and applying namespaces in the correct way. Now, if you wanted to be extra-friendly to the people who don't want to have to understand how XML works and want to use is as a text file, you could offer to add a prefix, with something like <scte35:SpliceInfoSection xmlns:scte35="https://scte.org/schemas/35" ptsAdjustment="0" protocolVersion="0" sapType="3" tier="4095">
<scte35:SpliceInsert spliceEventId="14294834" spliceEventCancelIndicator="false" spliceImmediateFlag="true" eventIdComplianceFlag="true" availNum="0" availsExpected="0" outOfNetworkIndicator="true" uniqueProgramId="49152">
<scte35:BreakDuration autoReturn="true" duration="3456000"/>
</scte35:SpliceInsert>
</scte35:SpliceInfoSection>and as before allowing the user to also specify a non-default prefix, and/or non-default namespace (to match whatever garbage their packager does), such as "normal" ones: <SCTE35:SpliceInfoSection ptsAdjustment="0" protocolVersion="0" sapType="3" tier="4095">
<SCTE35:SpliceInsert spliceEventId="14294834" spliceEventCancelIndicator="false" spliceImmediateFlag="true" eventIdComplianceFlag="true" availNum="0" availsExpected="0" outOfNetworkIndicator="true" uniqueProgramId="49152">
<SCTE35:BreakDuration autoReturn="true" duration="3456000"/>
</SCTE35:SpliceInsert>
</SCTE35:SpliceInfoSection>or funky ones (don't laugh, I've seen something not far from that in the real world): <toto:SpliceInfoSection xmlns:toto="ns1" ptsAdjustment="0" protocolVersion="0" sapType="3" tier="4095">
<toto:SpliceInsert spliceEventId="14294834" spliceEventCancelIndicator="false" spliceImmediateFlag="true" eventIdComplianceFlag="true" availNum="0" availsExpected="0" outOfNetworkIndicator="true" uniqueProgramId="49152">
<toto:BreakDuration autoReturn="true" duration="3456000"/>
</toto:SpliceInsert>
</toto:SpliceInfoSection>That's my thoughts on converting to XML. Now, when it comes to parsing from XML, it gets much harder... because there is a lot of junk out there, with all those various namespaces, invalid ones (looking at you MediaKind!), and it would be quite a limitation to want to be normative in this instance. Want an example (again, real life)? <EventStream schemeIdUri="urn:scte:scte35:2014:xml+bin" timescale="90000">
<Event id="289535">
<scte35:Signal>
<Binary>
/DBeAAAAAAAAAP/wBQb+On0tBgBIAhRDVUVJAARqC3//AAAUmXAAADAKEAIfQ1VFSQAEav9/vwwQQURGUgEzoQE0PioEagWwGAIAAAIPQ1VFSQAEagp/vwAAMQkQuJbGZg==</Binary>
<scte35:SpliceInfoSection scte35Point="155399966445254">
<scte35:SegmentationDescriptor segmentationEventId="289291" segmentationTypeId="48" segmentationDuration="PT15S">AhRDVUVJAARqC3__AAAUmXAAADAKEA==</scte35:SegmentationDescriptor>
</scte35:SpliceInfoSection>
</scte35:Signal>
</Event>
</EventStream> |
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And another random one that I had a 2 months' fight with a client about: <EventStream schemeIdUri="urn:scte:scte35:2013:xml" timescale="10000000" xmlns:scte35="ns2">
<Event presentationTime="0" duration="0">
<scte35:SpliceInfoSection scte35:ptsAdjustment="0">
<scte35:TimeSignal>
<scte35:SpliceTime scte35:ptsTime="38019600"/>
</scte35:TimeSignal>
<scte35:SegmentationDescriptor scte35:segmentationEventId="1" scte35:segmentationEventCancelIndicator="false" scte35:segmentationDuration="0" scte35:segmentationTypeId="52" scte35:segmentNum="0" scte35:segmentsExpected="0" scte35:subSegmentNum="152" scte35:subSegmentsExpected="190">
<scte35:SegmentationUpid scte35:segmentationUpidType="9" scte35:segmentationUpidFormat="hexbinary">505245564945573A6361626C654C6162732D66696C6D732E636F6D</scte35:SegmentationUpid>
</scte35:SegmentationDescriptor>
</scte35:SpliceInfoSection>
<scte35:Ext scte35:availType="52"/>
</Event>
</EventStream>I took offence with the use of the prefix on the attributes (which is not necessary at best, as implicit, and in my reading of it goes against the SCTE35 XSD). Yet, the SCTE Workgroup 5 - contacted by the customer - ruled that:
|
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Excellent summary @wabiloo 👌 This seems like a great set of feature ideas. I would still prefer option (1) to be the default. For the record, I love namespaces. It's just that, as stated at the top, they are so often misunderstood. |
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I'd be happy to (try and) contribute that to the code @futzu - in the coming days if I manage to carve out the time |
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XML Namespaces are often URLs by convention. These URLs do not necessarily return an actual document... |
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<EventStream schemeIdUri="urn:scte:scte35:2014:xml+bin" timescale="90000">
<Event id="289535">
<scte35:Signal>
<Binary>
/DBeAAAAAAAAAP/wBQb+On0tBgBIAhRDVUVJAARqC3//AAAUmXAAADAKEAIfQ1VFSQAEav9/vwwQQURGUgEzoQE0PioEagWwGAIAAAIPQ1VFSQAEagp/vwAAMQkQuJbGZg==</Binary>
<scte35:SpliceInfoSection scte35Point="155399966445254">
<scte35:SegmentationDescriptor segmentationEventId="289291" segmentationTypeId="48" segmentationDuration="PT15S">AhRDVUVJAARqC3__AAAUmXAAADAKEA==</scte35:SegmentationDescriptor>
</scte35:SpliceInfoSection>
</scte35:Signal>
</Event>
</EventStream>That is explicitly not allowed by 214,
@wabiloo |
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Hi @futzu, no, not working for Disney. Various other dinosaur clients though (and some nice ones) |
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I don't think there's much need to spend time on this one, it was just as an example of things seen in the field. |
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It allows random attributes but not random nodes. |
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This is the whole problem, so much of the spec is a not really clear. |
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that's out just now in v2.4.97. |
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Cool. And how do I set the I'm guessing something like the following? On my phone, can't try by myself |
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Just set it. >>>> x=cue.xml(binary=True)
>>>> x.attrs
{'xmlns': 'https://scte.org/schemas/35'}
>>>> x.attrs['xmlns']="whatever"
>>>> x.attrs
{'xmlns': 'whatever'}
>>>> I really don't think anybody is going to be changing that except you, I'm just curious. |
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To match what my |
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Once you change the xmlns, it's no longer SCTE-35. |
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that being said, I just came with a better way to do it, @fu:~/build/SCTE35_threefive$ pypy3
Python 3.9.16 (7.3.11+dfsg-2+deb12u2, May 20 2024, 22:08:06)
[PyPy 7.3.11 with GCC 12.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>>> with open('xml.xml','r') as ex: exemel=ex.read() # Read in the xml from a file
>>>> from threefive import Cue
>>>> cue=Cue(exemel)
>>>> x=cue.xml()
>>>> x.set_ns() # <-------------- clear the "scte35" namespace
>>>> x
<SpliceInfoSection xmlns="https://scte.org/schemas/35" ptsAdjustment="0" protocolVersion="0" sapType="3" tier="4095">
<SpliceInsert spliceEventId="1" spliceEventCancelIndicator="false" spliceImmediateFlag="false" eventIdComplianceFlag="true" availNum="0" availsExpected="0" outOfNetworkIndicator="false" uniqueProgramId="1">
<Program>
<SpliceTime ptsTime="10800000"/>
</Program>
</SpliceInsert>
</SpliceInfoSection>
>>>> x.set_ns("toto") # <--------- set namespace
>>>> x.set_ans("fufu") # <----------set attribute namespace
>>>> x
<toto:SpliceInfoSection fufu:PtsAdjustment="0" fufu:ProtocolVersion="0" fufu:SapType="3" fufu:tier="4095" xmlns:fufu="https://scte.org/schemas/35">
<toto:SpliceInsert fufu:SpliceEventId="1" fufu:SpliceEventCancelIndicator="false" fufu:SpliceImmediateFlag="false" fufu:EventIdComplianceFlag="true" fufu:AvailNum="0" fufu:AvailsExpected="0" fufu:OutOfNetworkIndicator="false" fufu:UniqueProgramId="1">
<toto:Program>
<toto:SpliceTime fufu:ptsTime="10800000"/>
</Program>
</SpliceInsert>
</SpliceInfoSection>
>>>> x.set_ns() # <-------- clear namespace
>>>> x
<SpliceInfoSection fufu:PtsAdjustment="0" fufu:ProtocolVersion="0" fufu:SapType="3" fufu:tier="4095" xmlns:fufu="https://scte.org/schemas/35">
<SpliceInsert fufu:SpliceEventId="1" fufu:SpliceEventCancelIndicator="false" fufu:SpliceImmediateFlag="false" fufu:EventIdComplianceFlag="true" fufu:AvailNum="0" fufu:AvailsExpected="0" fufu:OutOfNetworkIndicator="false" fufu:UniqueProgramId="1">
<Program>
<SpliceTime fufu:ptsTime="10800000"/>
</Program>
</SpliceInsert>
</SpliceInfoSection>
>>>> x.set_ans() # <------------- clear attribute namespace
>>>> x
<SpliceInfoSection xmlns="https://scte.org/schemas/35" ptsAdjustment="0" protocolVersion="0" sapType="3" tier="4095">
<SpliceInsert spliceEventId="1" spliceEventCancelIndicator="false" spliceImmediateFlag="false" eventIdComplianceFlag="true" availNum="0" availsExpected="0" outOfNetworkIndicator="false" uniqueProgramId="1">
<Program>
<SpliceTime ptsTime="10800000"/>
</Program>
</SpliceInsert>
</SpliceInfoSection>
>>>> |
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Nice! This seems to be missing quotes though: |
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shit :) |
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>>>> y.namespace.prefix_all()
>>>> y
<scte35:SpliceInfoSection xmlns:scte35="https://scte.org/schemas/35" scte35:PtsAdjustment="0" scte35:ProtocolVersion="0" scte35:SapType="3" scte35:tier="4095">
<scte35:SpliceInsert scte35:SpliceEventId="1" scte35:SpliceEventCancelIndicator="false" scte35:SpliceImmediateFlag="false" scte35:EventIdComplianceFlag="true" scte35:AvailNum="0" scte35:AvailsExpected="false" scte35:OutOfNetworkIndicator="false" scte35:UniqueProgramId="1">
<scte35:Program>
<scte35:SpliceTime scte35:ptsTime="10800000"/>
</scte35:Program>
<scte35:BreakDuration scte35:AutoReturn="true" scte35:duration="2971107"/>
</scte35:SpliceInsert>
</scte35:SpliceInfoSection>
>>>> y.namespace.prefix_all(False)
>>>>
>>>>
>>>>
>>>> y
<scte35:SpliceInfoSection xmlns:scte35="https://scte.org/schemas/35" ptsAdjustment="0" protocolVersion="0" sapType="3" tier="4095">
<scte35:SpliceInsert spliceEventId="1" spliceEventCancelIndicator="false" spliceImmediateFlag="false" eventIdComplianceFlag="true" availNum="0" availsExpected="false" outOfNetworkIndicator="false" uniqueProgramId="1">
<scte35:Program>
<scte35:SpliceTime ptsTime="10800000"/>
</scte35:Program>
<scte35:BreakDuration autoReturn="true" duration="2971107"/>
</scte35:SpliceInsert>
</scte35:SpliceInfoSection>
>>>> y.namespace.xmlns()
'xmlns:scte35="https://scte.org/schemas/35"'
>>>> y.namespace.uri
'https://scte.org/schemas/35'
>>>> y.namespace.uri="https://iodisco.com/scte35"
>>>> y.namespace.ns
'scte35'
>>>> y.namespace.ns="iodisco"
>>>>
>>>>
>>>>
>>>> y
<iodisco:SpliceInfoSection xmlns:iodisco="https://iodisco.com/scte35" ptsAdjustment="0" protocolVersion="0" sapType="3" tier="4095">
<iodisco:SpliceInsert spliceEventId="1" spliceEventCancelIndicator="false" spliceImmediateFlag="false" eventIdComplianceFlag="true" availNum="0" availsExpected="false" outOfNetworkIndicator="false" uniqueProgramId="1">
<iodisco:Program>
<iodisco:SpliceTime ptsTime="10800000"/>
</iodisco:Program>
<iodisco:BreakDuration autoReturn="true" duration="2971107"/>
</iodisco:SpliceInsert>
</iodisco:SpliceInfoSection>
>>>> y.namespace.prefix_all()
>>>>
>>>>
>>>>
>>>>
>>>> y
<iodisco:SpliceInfoSection xmlns:iodisco="https://iodisco.com/scte35" iodisco:PtsAdjustment="0" iodisco:ProtocolVersion="0" iodisco:SapType="3" iodisco:tier="4095">
<iodisco:SpliceInsert iodisco:SpliceEventId="1" iodisco:SpliceEventCancelIndicator="false" iodisco:SpliceImmediateFlag="false" iodisco:EventIdComplianceFlag="true" iodisco:AvailNum="0" iodisco:AvailsExpected="false" iodisco:OutOfNetworkIndicator="false" iodisco:UniqueProgramId="1">
<iodisco:Program>
<iodisco:SpliceTime iodisco:ptsTime="10800000"/>
</iodisco:Program>
<iodisco:BreakDuration iodisco:AutoReturn="true" iodisco:duration="2971107"/>
</iodisco:SpliceInsert>
</iodisco:SpliceInfoSection>
>>>> y.namespace.ns="gonzo"
>>>>
>>>>
>>>>
>>>>
>>>> y
<gonzo:SpliceInfoSection xmlns:gonzo="https://iodisco.com/scte35" gonzo:PtsAdjustment="0" gonzo:ProtocolVersion="0" gonzo:SapType="3" gonzo:tier="4095">
<gonzo:SpliceInsert gonzo:SpliceEventId="1" gonzo:SpliceEventCancelIndicator="false" gonzo:SpliceImmediateFlag="false" gonzo:EventIdComplianceFlag="true" gonzo:AvailNum="0" gonzo:AvailsExpected="false" gonzo:OutOfNetworkIndicator="false" gonzo:UniqueProgramId="1">
<gonzo:Program>
<gonzo:SpliceTime gonzo:ptsTime="10800000"/>
</gonzo:Program>
<gonzo:BreakDuration gonzo:AutoReturn="true" gonzo:duration="2971107"/>
</gonzo:SpliceInsert>
</gonzo:SpliceInfoSection>
>>>> y.namespace.prefix_all(False)
>>>> y
<gonzo:SpliceInfoSection xmlns:gonzo="https://iodisco.com/scte35" ptsAdjustment="0" protocolVersion="0" sapType="3" tier="4095">
<gonzo:SpliceInsert spliceEventId="1" spliceEventCancelIndicator="false" spliceImmediateFlag="false" eventIdComplianceFlag="true" availNum="0" availsExpected="false" outOfNetworkIndicator="false" uniqueProgramId="1">
<gonzo:Program>
<gonzo:SpliceTime ptsTime="10800000"/>
</gonzo:Program>
<gonzo:BreakDuration autoReturn="true" duration="2971107"/>
</gonzo:SpliceInsert>
</gonzo:SpliceInfoSection> |
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Looking great. Or because i can't think of a realistic use case in which one would prefix the attributes but not the elements: |
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I like names that make sense, but args are much harder to remember, and If I type the word "attribute" one more time I'm going to shoot myself in the big toe. I feel your pain though, I go through this kind of stuff all the time myself. With HLS nobody wants to use PTS, they wanted to use wall clock time, and that really doesn't work as well as PTS. Every hls related job I've done has started with me campaigning on behalf of PTS. It's exhausting. |
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The more I think about, once it's outside of the scte35 namespace, it's outside the scope of threefive, you'll have to deal with that externally. |
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SCTE-214
Adrian of Doom and @davemevans and @wabiloo are currently implementing Dash and XML support to threefive, this is where we discuss it. Feel free to join us.
Adrian
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