Adding transcoding support for the speex audio codec (libspeex)

[Former user]

See http://forum.serviio.org/viewtopic.php?f=3&t=6272&p=45302

[Petr Nejedly]

can you upload a short example file somewhere?

[Former user]

The bug which prevented ffmpeg from processing speex audio is described here: http://trac.ffmpeg.org/ticket/3779

The patch that fixes the problem is posted here: http://thread.gmane.org/gmane.comp.video.ffmpeg.devel/180162

And the ffmpeg-65341 release that incorporates the patch is posted here: http://ffmpeg.zeranoe.com/builds/win32/static/ffmpeg-20140806-git-305f72a-win32-static.7z

A sample avc/speex video may be downloaded from here: http://streams.videolan.org/issues/2973/live_user_watchmeblink_0.flv

and is correctly transformed to avc/mp3 by the command: ffmpeg.exe -i live_user_watchmeblink_0.flv -c:v copy -c:a libmp3lame -b:a 192k -ar 44100 -ac 2 -map 0:0 -map 0:1 -sn -f flv speexout.flv

Speex is now being used by some on-line streams but Serviio has no audio, so speex needs to be added to your list of valid matches acodecs and to the online audio portion of the generic and application profiles.

[Petr Nejedly]

More details in #806