[FFmpeg-devel] Patch to eliminate spurious "File is broken, keyframes not correctly marked!" in valid WebM

Monty Montgomery xiphmont at gmail.com
Wed Sep 11 08:06:45 CEST 2013

As of last year, ffmpeg and apps making use of ffmpeg (such as
mplayer) complain about a great many valid webm files ("File is
broken, keyframes not correctly marked!")   The obvious cause is the
patch to Trac bug #1003.

I believe I understand what the fix was attempting, and have an
alternate fix that avoids the spurious errors.  It properly handles
(and squawks) about the example file attached to Trac #1003.  There is
no functional change to the code or data path, only whether or not the
error is emitted.

Patch against master attached.
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