Bug#593162: [Audacity-devel] Audacity fails to load libavformat52/FFmpeg 0.6: undefined symbol: match_ext

[Gale Andrews]

| From Reinhard Tartler <siretart at tauware.de> 
| Tue, 31 Aug 2010 07:59:15 +0200
| Subject: [Audacity-devel] Audacity fails to load libavformat52/FFmpeg 0.6: undefined symbol: match_ext
> [ CC'ing audacity-devel for further input. Full context is at
>   http://bugs.debian.org/593162 ]
> 
> Hi,
> 
> On Mon, Aug 30, 2010 at 23:23:35 (CEST), Alex Converse wrote:
> 
> > Attached patch allows audacity to runtime detect match_ext() vs av_match_ext().
> >
> > Audacity compiled with this patch against FFmpeg 0.5 will still have
> > problems with AVPacket and AVFifo API issues that they have put behind
> > "#if FFMPEG_STABLE"
> 
> This means that we could probably take this patch for experimental and
> maverick, where we already have FFmpeg 0.6 as system ffmpeg, but
> definitly not for squeeze that will ship FFmpeg 0.5.
> 
> Does anyone has a contact at upstream that we could point this issue to?
> Ideally we had a patch that works with both FFmpeg 0.5 and 0.6.
> It seems to be "known" upstream after all:
> 
> http://wiki.audacityteam.org/wiki/Known_Issues
>
>
| From Reinhard Tartler <siretart at tauware.de> 
| Tue, 31 Aug 2010 09:55:34 +0200
| Subject: [Audacity-devel] Bug#593162: Audacity fails to load libavformat52/FFmpeg 0.6: undefined symbol: match_ext
> If you rely only on public symbols, then I'd consider every
> incompatibility as a bug. Note that match_ext was not supposed to be an
> external symbol, but av_match_ext is.

Just an "administrivia" response that this problem is on our bugzilla:
http://bugzilla.audacityteam.org/show_bug.cgi?id=176 

and no patch was attached to the message sent, so I've attached it here. 

Also to note that for Windows and Mac, almost all users will be reliant
on the FFmpeg installer we provide (which is 0.5 at present).

Hopefully LRN who developed the FFmpeg feature in Audacity will 
comment about this when he gets a chance. 


Thanks,



Gale   
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