[MPlayer-users] Skipping first video packet and video shown 1/4 problems with Quicktime/MOV files

[Corey Hickey]

Bill Yi wrote:
> I am new to this mailing list. I'd like to ask a question about decoding
> problem using MPlayer.
> 
> 1. For some mov files made from iMovie, the first GOP is not decoded
> correctly using MPlayer (dev-CVS-050928-16:38-3.4.2). For some reason, the
> first video packet is skipped which is an Intra frame. The video then
> resumes until the start of the second GOP. I suspect it's a demuxer issue.
> The file can be played correctly by other players, e.g., ffplay, QuickTime.
> 
> I have put one example under the ftp site
> /MPlayer/incoming/decode_problem_imovie_h264.mp4.
> 
> 2. Again, for some other Quicktime/MOV files (mp4v video + mp4a audio), 
> only
> 1/4 of the video is shown, i.e. 320x240 versus 640x480. It looks like the
> container resolution is 320x240 but the video stream resolution is 640x480.
> Quicktime plays as 640x480.
> fps file: /MPlayer/incoming/v640x480_shows_320x240_problem.mp4

I haven't checked the file you uploaded, but I think this is a known 
problem. I forget the details. Try using '-demuxer lavf'. It might help 
with the first problem, too.

-Corey