[MPlayer-users] QuickTime demuxer problem [bug?]
chn at kbw.ch
Fri Sep 12 16:27:36 CEST 2003
Sorry, I sent the message to early...
I'm not quite sure if I found a bug in the QuickTime demuxer of
I cut off of some parts of a movie encoded with libavcodecs mpeg4 codec
and saved it as self contained QuickTime movie.
After that I wanted to compress it a little more using the xvid codec
included in mencoder. But now the video track does no more start with a
key frame. mencoder prints some error messages and the image gets
I think the problem might be that each QuickTime track contains a media
describing the video. the media begins with a keyframe (though i'm not
quite sure about that) but the track maps the media in its own
time-coordinatespace, not necessarily beginning with the first frame of
the media it contains, so the track does not begin with a key frame.
Is this scenario possible?
The sample movie is about 350 MB, but perhaps I can make a little
samplemovie with the same problem if this could help.
Another Problem is I cannot make the movie public since I got no access
to a public server.
Is there anything else you have to know?
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