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

Baptiste Coudurier baptiste.coudurier
Wed Oct 24 11:34:36 CEST 2007


Richard Spindler wrote:
> Hi,
> This patch adds support for the FFVH quicktime atom that is used to
> store the Extradata for quicktime files with ffvhuff codec generated
> by libquicktime.

Well, it would be better if we decided a normative way to wrap
ffv1/ffvhuff into Quicktime (mov).

IMHO using 'FFVH' as fourcc is OK, it is the avi fourcc, that also means
that current demuxer should not need the first patch since search is
performed in avi tags if no official mov fourcc is found.

Concerning extradata, I think It is a good opportunity to use the new
design defined to store Xiph codecs:


"A single glbl atom shall be placed in the stsd atom in which the the
global header shall be stored."

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