encapp: add os walk and regexp search to video file path

input.filepath can now be either:
1) specific file
2) a folder
3) a root folder with a regexp filename

A file walk will be performed at the root folder (last '/')
and files will be matched based on endings and a regexp filter.
E.g
    input {
        filepath: "~/Downloads/.*[0-1]{1}.mov"
    }

Matching anythign in the downloads folder with a single digit of either 0 or 1
and '.mov' ending.

It will traverse subfolders as well as the root.

Signed-off-by: JohanBlome <[email protected]>

scripts/encapp.py

@@ -152,13 +152,15 @@
     ".raw",
     ".yuv",
     ".ivf",
+    ".mkv",
 ]
 
 
 def isVideoExtension(filename):
     ending = f".{filename.rsplit('.')[-1]}"
     if ending is not None and ending in video_extensions:
         return True
+
     return False
 
 
@@ -814,20 +816,27 @@ def createTestsFromDefinitionExpansion(testsuite):
 
 
 def expand_filepath(path):
-    # Allow regexp on filenam
-    basename = os.path.basename(path)
-    folder = os.path.dirname(path)
-    folder = os.path.expanduser(folder)
+    # Check if path is a folder
+    basename = ""
+    folder = ""
+    path = os.path.expanduser(path)
+    if os.path.isdir(path):
+        folder = path
+    else:
+        basename = os.path.basename(path)
+        folder = os.path.dirname(path)
     video_files = []
     for root, _dirs, files in os.walk(folder):
         for file in files:
             if isVideoExtension(file):
                 if len(basename) > 0:
                     m = re.search(basename, file)
                     if m:
-                        file = f"{folder}/{m.group(0)}"
+                        file = f"{root}/{m.group(0)}"
                     else:
                         continue
+                else:
+                    file = f"{root}/{file}"
                 video_files.append(file)
 
     return video_files