[MPlayer-users] gmplayer displays just a crop of an mp4, sample file

[Richard Sotke]

Am Mittwoch, 7. November 2007 17:54:46 schrieb Larry Reznick:
> Carl Eugen Hoyos wrote:
> > Hi!
> >
> > Daniel Kirsten <Daniel.Kirsten <at> gmx.net> writes:
> >> I put a sample file at
> >> http://www.informatik.uni-leipzig.de/~kirsten/movie.mp4
> >
> > It works as you expect with -demuxer lavf
> >
> > Could the sample be moved to samples.mplayerhq.hu/mov/resolution.mov ?
> >
> > Thank you, Carl Eugen
>
> Hi, Carl.
>
> That works around the problem. However, MPlayer does recognize the file
> format as Quicktime/MOV, so why doesn't it interpret the data correctly,
> as VLC did? It still seems that there's some MPlayer data handling error
> for it to be confused or sidetracked by whatever is in that file where
> VLC didn't get confused.
>
> --Larry

In the meta data(moov box) of the file mp4 file, the Width and Height in the 
TrackHeaderBox and MPEGVisualSampleDescriptionBox is 320x240. You can take a 
look at it with:

MP4Box -diso movie.mp4

The information from the moov box doesn't fit with the DecoderSpecificInfo.
If you remux the file with:

MP4Box -add movie.mp4 movie_remuxed.mp4

the problem will disappear. 

Regards
Richard