[ubuntu-studio-devel] Audacity Bug

lukefromdc at hushmail.com lukefromdc at hushmail.com
Sat Mar 1 18:48:25 UTC 2014

Lately there has been talk of reverting to ffmpeg as that's where the development effort
seems to be. Ubuntu is reported to be falling behind with libav versions as distributed. For
my purposes I simply rejected the new versions of audacity, the old version works fine with
my multi-versions of libav and ffmpeg from a rolling updated system with PPA versions of

Glad to see someone working on this, now someone needs to deal with the plugins issue.
Alternative might be a "portable" full-featured Audacity with its own libraries in its own
directory if system ffmpeg/libav incompatabilities are going to be such a problem. I last 
built  Audacity from source in 2009 when compressor sliders were broken and I had to 
edit the source to compile in my preferred settings as default.

On 03/01/2014 at 7:48 AM, "Ross Gammon" <rossgammon68 at gmail.com> wrote:
>On 02/27/2014 12:08 PM, Kaj Ailomaa wrote:
>> On Thu, Feb 27, 2014, at 11:24 AM, ttoine wrote:
>>> do someone really use ladspa with audacity ?
>> Makes me think you don't use audacity a lot :).
>> The use of plugins is really a necessity. Not having ladspa is 
>> crippling.
>> It's one of those bugs that we should find during development 
>phase. And
>> it is that kind of things we should add to our test cases, when 
>we write
>> them.
>> Probably a simple problem to solve, from the Debian packager 
>> side.
>Audacity 2.0.5 was released in Debian without ffmpeg support 
>because it
>has not been fully ported to libav9 [1]. Apparently, no-one stepped
>forward to do the work so it was necessary to disable ffmpeg to 
>the libav 9 transition to complete. See Debian bug #692809 [2].
>Details of the changes in libav 9 are here: [3] & [4]
>With ffmpeg re-enabled in debian/rules, audacity fails to build. 
>This is
>because FFmpeg.h should now use "AVSampleFormat" instead of
>"SampleFormat". A patch (see attached) was attached to the Debian 
>which I have applied and now the build goes a little further 
>before failing.
>Now it stops when FFmpeg.cpp tries to use URLContext which is now a
>private function. I am not sure what should be used instead.
>According to the Debian bug, if we sort that out, then
>export/ExportFFmpeg.cpp would be the next thing that needs fixing.
>I will keep delving in to this here and there when I have time, but
>someone with better C++ skills and/or knowledge of the Audacity 
>code is
>welcome to step in and do it faster :-)
>[2] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=692809
>[4] https://libav.org/doxygen/release/0.8/deprecated.html

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