[FFmpeg-devel] [PATCH] Read extradata Quicktime-Atom "FFVH" for ffvhuff files from libquicktime

Alexander Strange astrange
Wed Oct 24 15:44:19 CEST 2007

On Oct 24, 2007, at 5:34 AM, Baptiste Coudurier wrote:
> Concerning extradata, I think It is a good opportunity to use the new
> design defined to store Xiph codecs:
> http://wiki.xiph.org/index.php/ 
> Oggless#Example_and_Discussion_of_the_Mov_container
> "A single glbl atom shall be placed in the stsd atom in which the the
> global header shall be stored."

The traditional way to do it is to add an atom with the codec's  
fourcc to the stsd atom.
This is what Xiph's QT component actually does, no matter what it  
says there.

Also, Perian implicitly defines MOV formats for everything it can  
play; for avi formats it just copies the video packets
and puts the extradata at the end of stsd like that.

(I uploaded ogg-audio.mov and huffyuv.mov to the mplayerhq incoming)

More information about the ffmpeg-devel mailing list