[theora] Broken Theora integration in FFMPEG

[xiphmont at xiph.org]

On Mon, May 18, 2009 at 1:01 AM, dos386 <dos386 at gmail.com> wrote:
> This file is impossible to encode into Theora (AVI works) with FFMPEG:
>
> http://freefile.kristopherw.us/uploads/temp/ffx3yuv.zi7
>
> See also: http://sf.net/tracker/?func=detail&aid=2789359&group_id=205275&atid=992986
>
> Tried many versions, until 2009-May PageFault, Sherpya's 2009-Apr and
> 2009-May versions produce garbage. Anyone can confirm this ? Used just
> ".ogv" as output extension, all auto/default.

ffmpeg has little chance of producing valid Theora output depending on
the version, especially as ffmpeg's Ogg mux support is broken anyway.
Their homespun vorbis encoder is also broken. Regardless what's
happening, we have no control over the ffmpeg source base.  You'd need
to contact the ffmpeg people, but we've not found them particularly
cooperative about fixing bugs.

In the meantime, you could try ffmpeg2theora, which uses ffmpeg as a
swiss-army-knife front end and then bolts that output onto our own
encoders.

Monty
Xiph.Org