[Mp4-tech] video stream auto-segmentation using keyframe data

[james engwell]

Dear All
I am trying to find out if the data structures are such within 
compliant mp4 files that it would be possible/feasible for us to 
retrieve a list of the keyframes from mpeg-4 encoded video streams.  We 
are hoping to be able to perform a very quick 'first-pass' segmention 
of the mpeg-4 video stream using this method. Ideally this retrieval 
would be able to occur without having to go through each frame. (or 
write frames out to a bitmaps & compare - as we are doing with 
un-encoded video)
Thanks in advance for any light shed
Regards
James
•
James Engwell
Frameline Development Director
•
versatile delivery systems ltd
Sheffield Technology Parks
Cooper Buildings
Arundel Street
Sheffield S1 2NS
•
Telephone: +44 (0)114-2211800
Fax: +44 (0)114-2211801
Mobile: +44 (0)7812-752658
E Mail: james frameline.tv
Web: http://www.frameline.tv
•
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