can't decode MJPEG avi

[sebastien wybo]

Trying to decode video encoded with MJPEG codec will fail if video contains delta frames => only first image will be decoded

reproduced with ffmpeg, ffplay

Windows 7 64bits, ffmpeg 0.10

[Carl Eugen Hoyos]

To make this a valid ticket, please add

• a failing ffmpeg command line together with
• complete, uncut console output and
• a sample

[sebastien wybo]

output report

[sebastien wybo]

Sorry about that...
Complete command line that generated the report file:

ffmpeg -v 9 -loglevel 99 -i MJPEGVideoWithDFrames.avi output.avi -report

[sebastien wybo]

Sample video file is currently uploaded to upload.ffmpeg.org/incoming/MJPEGVideoWithDFrames.avi

[reimar]

This has nothing to do with "delta frames" (no idea what it is but I don't think it is even used here) and nothing with the (M)JPEG decoder.
MPlayer can play it fine using FFmpeg's decoder.
It plays only one frame when using -demuxer lavf though.
ffprobe -show_packets confirms FFmpeg sees only a single video frame.
This should be a bug in the AVI demuxer.

[sebastien wybo]

That's my point actually, if you check the avi file in virtual dub you'll see D frames (delta frames) every 3 frames with no data in it. This is caused by a badly functionning encoder actually but VLC or virtual dub can read all frames in the video whereas ffplay, ffmpeg... can't find any frame other than the first one

I thought this indicated some kind of issue in the AVI demuxer