Hi all, I'm having a small issue encoding video with the Raspberry Pi's hardware encoder, available as a V4L2M2M device that ffmpeg can use in current firmware/kernel versions.
If I try to encode a video where the width is not a multiple of 64 pixels, I get video corruption. I opened an issue about it on the Raspberry Pi GitHub repo[1] including screenshots of the corruption, and they got back to me saying they suspect ffmpeg is not setting the stride value correctly as reported by the V4L2M2M interface. Is there any way to find out what stride value ffmpeg is using and/or override it, to try to work out whether ffmpeg is setting the wrong value, or whether the RasPi firmware is supplying the wrong value to begin with? If anyone has ffmpeg running on a Pi, then the command listed in the GitHub issue to reproduce the problem is: ffmpeg -f lavfi -i testsrc=size=1296x972:rate=30 -pix_fmt yuv420p -c:v h264_v4l2m2m -f avi - | ffplay - By adjusting the width of the test video, only values that are multiples of 64 produce clean video. Other values produce diagonal lines across the video as shown in the GitHub issue. Many thanks, Adam. 1: https://github.com/raspberrypi/firmware/issues/1608 _______________________________________________ ffmpeg-user mailing list [email protected] https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
