Vertically Squished Video

[justinchevrier]

I've run into an issue using a BC-H16480A card. The encoders (I've tried the first 2 or 3) all output video that is squished vertically so that it only takes up about half the proper height and the remainder is filled with corruption/grey space. This happens in Zoneminder (1.28.0) as well as ffmpeg (version 2.6.1) with both H264 and MJPEG. I'm running code from head, but I've also tried going to back 2.4.11 with no change. Kernel version is 3.18.9 on AMD64 and the distribution is Gentoo. Cameras are NTSC at 704x480 resolution. I've been able to apply video filters via ffmpeg to crop and stretch the image, but I'm not sure if I'm losing detail, it looks not too bad though. Here is the command I used to do this:

ffmpeg -f v4l2 -input_format h264 -standard ntsc-m -s 704x480 -i /dev/video1 -vf "crop=704:240:0:0",scale=iw:ih*2 test.mp4

Screenshot:

Thoughts?

Thanks guys

[curtishall]

Are your cameras PAL or NTSC?

[justinchevrier]

They are NTSC.

[justinchevrier]

I should add that if I capture video from the output device (/dev/video0) the video looks correct.