Après installation de lame et sox et redémarrage :
~$ ffmpeg -i G_140904_aac.mkv -vcodec copy -acodec libmp3lame -ar 44100 -ac 2 -ab 256k G_140904_mp3.mkv
ffmpeg version 0.8.15-4:0.8.15-0ubuntu0.12.04.1, Copyright (c) 2000-2014 the Libav developers
built on Aug 10 2014 18:16:45 with gcc 4.6.3
*** THIS PROGRAM IS DEPRECATED ***
This program is only provided for compatibility and will be removed in a future release. Please use avconv instead.
[matroska,webm @ 0x8a70aa0] Estimating duration from bitrate, this may be inaccurate
Input #0, matroska,webm, from 'G_140904_aac.mkv':
Metadata:
ENCODER : Lavf53.21.1
Duration: 00:07:52.71, start: 0.000000, bitrate: N/A
Stream #0.0: Video: h264 (High), yuv420p, 640x360 [PAR 90:90 DAR 16:9], 25 fps, 25 tbr, 1k tbn, 50 tbc (default)
Stream #0.1: Audio: aac, 44100 Hz, stereo, s16 (default)
Unknown encoder 'libmp3lame'
:~$
Puis j'ai créé un lien symbolique en vain :
~$ sudo ln -s /usr/lib/i386-linux-gnu/libmp3lame.so.0.0.0
~$ sudo mv /home/moi/libmp3lame.so.0.0.0 /usr/lib/i386-linux-gnu/libmp3lame
Mais j'ai toujours
~$ ffmpeg -i G_140904_aac.mkv -vcodec copy -acodec libmp3lame -ar 44100 -ac 2 -ab 256k G_140904_mp3.mkv
ffmpeg version 0.8.15-4:0.8.15-0ubuntu0.12.04.1, Copyright (c) 2000-2014 the Libav developers
built on Aug 10 2014 18:16:45 with gcc 4.6.3
*** THIS PROGRAM IS DEPRECATED ***
This program is only provided for compatibility and will be removed in a future release. Please use avconv instead.
[matroska,webm @ 0x84c3aa0] Estimating duration from bitrate, this may be inaccurate
Input #0, matroska,webm, from 'G_140904_aac.mkv':
Metadata:
ENCODER : Lavf53.21.1
Duration: 00:07:52.71, start: 0.000000, bitrate: N/A
Stream #0.0: Video: h264 (High), yuv420p, 640x360 [PAR 90:90 DAR 16:9], 25 fps, 25 tbr, 1k tbn, 50 tbc (default)
Stream #0.1: Audio: aac, 44100 Hz, stereo, s16 (default)
Unknown encoder 'libmp3lame'
~$
J'ai
retiré le lien symbolique.