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Re: Movie Video Chart Help
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Re: Movie Video Chart Help


On Feb 22, 2008, Ryan Gallagher wrote:

I have the mpeg2 quicktime component, but when ever i try to open a
mpeg2 with Movie Video Chart it reports a "no video track found" error. 


On line 502 of ChartWindow.c of MovieVideoChart sample, change

videoTrack = GetMovieIndTrackType( movie, 1, VideoMediaType, movieTrackMediaType );
if( ! videoTrack ) {

to

videoTrack = GetMovieIndTrackType( movie, 1, VideoMediaType, movieTrackMediaType );
if( ! videoTrack )
videoTrack = GetMovieIndTrackType( movie, 1, 'm2s ', movieTrackMediaType );
if( ! videoTrack ) {


Evidently QT does not currently consider mpeg2 video to be of VideoMediaType, or even MPEGMediaType, but of type 'm2s '.
To be robust, code therefore needs to check for all three types before concluding there is no video in a movie.

See http://lists.apple.com/archives/QuickTime-API//2007/Nov/ msg00012.html







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