[mythtv-users] OT: FFMPEG conversion

[John Pilkington]

Brent Norris wrote:
> James Oltman wrote:
>> I get a similar error when I try to transcode a .mod file to mpeg4 avi
>>
>>
>>     [mpeg4 @ 0x2190180]timebase not supported by mpeg 4 standard
>>     Error while opening codec for output stream #0.0 - maybe incorrect
>>     parameters such as bit_rate, rate, width or height
>>
>>     The command I found to do it from the internet was:
>>
>>     ffmpeg -vcodec mpeg4 -s 720x576 -b 9600k -aspect 16:9 -acodec mp3
>>     -ab 192k -ar 48000 -i Playing.MOD Playing.avi
>>
>>     I think I know what most of it means, but I don't know why it won't
>>     encode it for me.  Can anyone help?
>>
>>     Brent
>>
>>
>> The whole command/error would be nice.  I'm wondering if you have the 
>> right audio rate defined.  Instead of '-ar 48000' try '-ar 44100'.
>>
>> Jim
> 
> Here it is:
> 
> [root at Diablo New Camera]# ffmpeg -vcodec mpeg4 -s 720x576 -b 9600k 
> -aspect 16:9                                              -acodec mp3 
> -ab 192k -ar 44100 -i Playing\ Match\ Game.MOD Playing\ Match\ Game. 
>                                          avi
> FFmpeg version 0.5-30.fc10, Copyright (c) 2000-2009 Fabrice Bellard, et al.
>   configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 
> --mandi   r=/usr/share/man --enable-shared --enable-gpl 
> --enable-postproc --enable-swscale --enable-avfilter 
> --enable-avfilter-lavf --enable-pthreads --enable-x11grab --e 
> nable-vdpau --disable-avisynth --disable-libamr-nb --disable-libamr-wb 
> --enable-                                             libdc1394 
> --enable-libdirac --enable-libfaac --enable-libfaad --enable-libfaadbi 
>                                            n --enable-libgsm 
> --enable-libmp3lame --enable-libschroedinger --enable-libspeex 
>                                     --enable-libtheora 
> --enable-libvorbis --enable-libx264 --enable-libxvid --extra 
>                                  -cflags=-O2 -g -pipe -Wall 
> -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protecto 
>                           r --param=ssp-buffer-size=4 -m64 
> -mtune=generic -fPIC --disable-stripping --extr                     
> a-cflags=-I/usr/include/nvidia-graphics 
> --extra-ldflags=-L/usr/lib64/nvidia-grap              hics
>   libavutil     49.15. 0 / 49.15. 0
>   libavcodec    52.20. 0 / 52.20. 0
>   libavformat   52.31. 0 / 52.31. 0
>   libavdevice   52. 1. 0 / 52. 1. 0
>   libavfilter    0. 4. 0 /  0. 4. 0
>   libswscale     0. 7. 1 /  0. 7. 1
>   libpostproc   51. 2. 0 / 51. 2. 0
>   built on Mar 15 2009 13:30:30, gcc: 4.3.2 20081105 (Red Hat 4.3.2-7)
> [mpeg4 @ 0x2684680]header damaged
> 
> Seems stream 0 codec frame rate differs from container frame rate: inf 
> (1/0) ->                                              90000.00 (90000/1)
> Input #0, mpeg, from 'Playing Match Game.MOD':
>   Duration: 00:10:11.51, start: 0.287489, bitrate: 5996 kb/s
>     Stream #0.0[0x1e0]: Video: mpeg4, yuv420p, 90k tbr, 90k tbn
>     Stream #0.1[0x80]: Audio: mp3, 0 channels, s16
> File 'Playing Match Game.avi' already exists. Overwrite ? [y/N] y
> Output #0, avi, to 'Playing Match Game.avi':
>     Stream #0.0: Video: mpeg4, yuv420p, q=2-31, 9600 kb/s, 90k tbn, 90k tbc
>     Stream #0.1: Audio: mp2, 0 channels, s16, 192 kb/s
> Stream mapping:
>   Stream #0.0 -> #0.0
>   Stream #0.1 -> #0.1
> [mpeg4 @ 0x2669180]timebase not supported by mpeg 4 standard
> Error while opening codec for output stream #0.0 - maybe incorrect 
> parameters su                                             ch as 
> bit_rate, rate, width or height
> [root at Diablo New Camera]#
> 
> That is with the 44100 change.
> _______________________________________________
> 

Your reference command line includes -acodec.  The logged version 
doesn't.  ??