[FFmpeg-user] speex to ac3 in mkv

[Madovsky]

>> Madovsky <infos <at> madovsky.org> writes:
>>
>>> ffmpeg -i rtmp://server/app/live -acodec ac3 -ar 48000
>>> -b:a 128k -vcodec copy -y output.mkv
>>
>> Please always add complete, uncut console output when
>> posting failing command lines here.
>>
> Ok
>
>> Do the following also fail?
>> $ ffmpeg -i rtmp://server/app/live -ar 48000 out.ac3
> works
>
>> $ ffmpeg -i rtmp://server/app/live -ar 48000 out.mp2
> works
>
>>
>> Carl Eugen
>
>
> console log:
>
> ===============
>
> ffmpeg -i "rtmp://server/app/live live=1" -acodec ac3 -ar 48000 -b:a 
> 128k -vcodec copy -y output.mkv
> ffmpeg version N-49519-g99eedfc Copyright (c) 2000-2013 the FFmpeg 
> developers
>  built on Feb  1 2013 16:33:20 with gcc 4.3.2 (GCC) 20081105 (Red Hat 
> 4.3.2-7)
>  configuration: --enable-static --enable-gpl --enable-nonfree --enable-libfaac 
>  --enable-libx264 --enable-pthreads --enable-postproc --enable-libspeex --enable-librtmp 
>  --enable-runtime-cpudetect --enable-libfreetype
>  libavutil      52. 17.100 / 52. 17.100
>  libavcodec     54. 91.100 / 54. 91.100
>  libavformat    54. 61.104 / 54. 61.104
>  libavdevice    54.  3.103 / 54.  3.103
>  libavfilter     3. 35.100 /  3. 35.100
>  libswscale      2.  2.100 /  2.  2.100
>  libswresample   0. 17.102 /  0. 17.102
>  libpostproc    52.  2.100 / 52.  2.100
> rtmp server sent error
> [flv @ 0x3559fe0] Estimating duration from bitrate, this may be inaccurate
> Input #0, flv, from 'rtmp://server/app/live live=1':
>  Duration: N/A, start: 0.000000, bitrate: N/A
>    Stream #0:0: Video: flv1, yuv420p, 320x240, 16.58 tbr, 1k tbn, 1k tbc
>    Stream #0:1: Audio: speex, 16000 Hz, mono, s16
> Output #0, matroska, to 'output.mkv':
>  Metadata:
>    encoder         : Lavf54.61.104
>    Stream #0:0: Video: flv1 (FLV1 / 0x31564C46), yuv420p, 320x240, q=2-31, 
> 1k tbn, 1k tbc
>    Stream #0:1: Audio: ac3 ([0] [0][0] / 0x2000), 48000 Hz, mono, fltp, 
> 128 kb/s
> Stream mapping:
>  Stream #0:0 -> #0:0 (copy)
>  Stream #0:1 -> #0:1 (libspeex -> ac3)
> Press [q] to stop, [?] for help
> frame=  313 fps= 19 q=-1.0 Lsize=     949kB time=00:00:18.54 bitrate= 
> 419.4kbits/s
> video:655kB audio:287kB subtitle:0 global headers:0kB muxing overhead 
> 0.777962%
> Received signal 2: terminating.
>
> ============
>
> fyi I use librtmp
>
> Thanks
>
> Franck


however

ffmpeg -i "rtmp://server/app/live live=1" -ar 48000 -y output.mkv

works too