[FFmpeg-user] Audio lost

[gerardo Juarez]

SaToNiO wrote:
> Hi,
>
> I'm trying to convert a file to other format (mpg to concatenate
> after) and i've noticed the audio track is missing in the converted
> file.
>
> look:
>
> satonio at satonio-laptop:~$ ffmpeg -i salida2.mp4 -s 352x288 -y salida.3gp
> ffmpeg version N-33094-gecf31a6, Copyright (c) 2000-2011 the FFmpeg developers
>   built on Sep 29 2011 19:39:35 with gcc 4.4.3
>   configuration: --enable-gpl --enable-libfaac --enable-libmp3lame
> --enable-libopencore-amrnb --enable-libopencore-amrwb
> --enable-libtheora --enable-libvorbis --enable-libx264
> --enable-libxvid --enable-nonfree --enable-postproc --enable-version3
> --enable-x11grab
>   libavutil    51. 18. 0 / 51. 18. 0
>   libavcodec   53. 18. 0 / 53. 18. 0
>   libavformat  53. 13. 0 / 53. 13. 0
>   libavdevice  53.  4. 0 / 53.  4. 0
>   libavfilter   2. 43. 6 /  2. 43. 6
>   libswscale    2.  1. 0 /  2.  1. 0
>   libpostproc  51.  2. 0 / 51.  2. 0
> [mov,mp4,m4a,3gp,3g2,mj2 @ 0x1950780] multiple edit list entries, a/v
> desync might occur, patch welcome
>     Last message repeated 2 times
> [mov,mp4,m4a,3gp,3g2,mj2 @ 0x1950780] stream 1, missing mandatory
> atoms, broken header
> [mov,mp4,m4a,3gp,3g2,mj2 @ 0x1950780] multiple edit list entries, a/v
> desync might occur, patch welcome
> [mov,mp4,m4a,3gp,3g2,mj2 @ 0x1950780] stream 3, missing mandatory
> atoms, broken header
> [mov,mp4,m4a,3gp,3g2,mj2 @ 0x1950780] max_analyze_duration 5000000
> reached at 5020000
>
> Seems stream 0 codec frame rate differs from container frame rate:
> 600.00 (600/1) -> 150.00 (150/1)
> Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'salida2.mp4':
>   Metadata:
>     major_brand     : 3gp5
>     minor_version   : 256
>     compatible_brands: 3gp53gp4isom
>     creation_time   : 2011-09-29 17:43:06
>   Duration: 00:00:59.36, start: 0.000000, bitrate: 1000 kb/s
>     Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p,
> 864x488, 920 kb/s, 20.01 fps, 150 tbr, 300 tbn, 600 tbc
>     Metadata:
>       creation_time   : 1945-09-21 14:05:41
>     Stream #0:1(eng): Data: none (stts / 0x73747473)
>     Metadata:
>       creation_time   : 1945-09-21 14:05:41
>     Stream #0:2(eng): Audio: pcm_mulaw (ulaw / 0x77616C75), 8000 Hz, 1
> channels, s16, 64 kb/s
>     Metadata:
>       creation_time   : 1945-09-21 14:05:41
>     Stream #0:3(eng): Data: none (stts / 0x73747473)
>     Metadata:
>       creation_time   : 1945-09-21 14:05:41
> [buffer @ 0x197af00] w:864 h:488 pixfmt:yuv420p tb:1/1000000 sar:0/1 sws_param:
> [scale @ 0x194fea0] w:864 h:488 fmt:yuv420p -> w:352 h:288 fmt:yuv420p flags:0x4
> [libopencore_amrnb @ 0x194edc0] bitrate not supported: use one of
> 4.75k, 5.15k, 5.90k, 6.70k, 7.40k, 7.95k, 10.20k, 12.20k, using 12.20k
> Output #0, 3gp, to 'salida.3gp':
>   Metadata:
>     major_brand     : 3gp5
>     minor_version   : 256
>     compatible_brands: 3gp53gp4isom
>     creation_time   : 2011-09-29 17:43:06
>     encoder         : Lavf53.13.0
>     Stream #0:0(eng): Video: h263 (s263 / 0x33363273), yuv420p,
> 352x288, q=2-31, 200 kb/s, 150 tbn, 150 tbc
>     Metadata:
>       creation_time   : 1945-09-21 14:05:41
>     Stream #0:1(eng): Audio: amr_nb (samr / 0x726D6173), 8000 Hz, 1
> channels, s16, 128 kb/s
>     Metadata:
>       creation_time   : 1945-09-21 14:05:41
> Stream mapping:
>   Stream #0.0 -> #0.0 (h264 -> h263)
>   Stream #0.2 -> #0.1 (pcm_mulaw -> libopencore_amrnb)
> Press [q] to stop, [?] for help
> [h263 @ 0x194b040] warning, clipping 1 dct coefficients to -127..127
>     Last message repeated 7 times
> frame= 8904 fps=770 q=31.0 Lsize=    4016kB time=00:00:00.00 bitrate=
>  0.0kbits/s dup=7716 drop=0
> video:3943kB audio:0kB global headers:0kB muxing overhead 1.853415%
>
> And after:
> satonio at satonio-laptop:~$ ffmpeg -i salida.3gp
> ffmpeg version N-33094-gecf31a6, Copyright (c) 2000-2011 the FFmpeg developers
>   built on Sep 29 2011 19:39:35 with gcc 4.4.3
>   configuration: --enable-gpl --enable-libfaac --enable-libmp3lame
> --enable-libopencore-amrnb --enable-libopencore-amrwb
> --enable-libtheora --enable-libvorbis --enable-libx264
> --enable-libxvid --enable-nonfree --enable-postproc --enable-version3
> --enable-x11grab
>   libavutil    51. 18. 0 / 51. 18. 0
>   libavcodec   53. 18. 0 / 53. 18. 0
>   libavformat  53. 13. 0 / 53. 13. 0
>   libavdevice  53.  4. 0 / 53.  4. 0
>   libavfilter   2. 43. 6 /  2. 43. 6
>   libswscale    2.  1. 0 /  2.  1. 0
>   libpostproc  51.  2. 0 / 51.  2. 0
>
> Seems stream 0 codec frame rate differs from container frame rate:
> 29.97 (30000/1001) -> 150.00 (150/1)
> Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'salida.3gp':
>   Metadata:
>     major_brand     : 3gp4
>     minor_version   : 512
>     compatible_brands: isomiso23gp4
>     creation_time   : 2011-09-28 23:00:00
>   Duration: 00:00:59.36, start: 0.000000, bitrate: 554 kb/s
>     Stream #0:0(eng): Video: h263 (s263 / 0x33363273), yuv420p,
> 352x288 [SAR 12:11 DAR 4:3], 544 kb/s, 150 fps, 150 tbr, 150 tbn,
> 29.97 tbc
>     Metadata:
>       creation_time   : 2011-09-28 23:00:00
> At least one output file must be specified
>
> It doesn't work neither converting it to mpg, avi, etc etc and all
> ends without audio.
>
> Also, i've noticed that those videos doesn't have sound played with
> mplayer (but with vlc work well).
>
> Thanks
> _______________________________________________
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> ffmpeg-user at ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/ffmpeg-user
>
>   
Streams 2 & 3 have broken headers. Have you tried mapping the streams 
(-map -map 0.0:0.0 -map 0.1:0.1...)
There seem to be multiple issues with the creation of the original file:
creation_time : 1945-09-21 14:05:41  (!!!)   Was there digital video at 
the end of WWII? ;-)