[Ffmpeg-devel] 3gp audio corrupt

[Aaron Williams]

Hi,

Aaron Williams wrote:
> I am trying to transcode a 3gp video and am having problems with the
> audio coming out corrupt.  Are there any known issues that would cause
> this?  The audio is reported as Stream #0.0(und): Audio: amr_nb, 8000
> Hz, mono
>
> I compiled this with the amr_nb floating point library.  The fixed point
> library does not seem to compile and I get unexplained errors.
>
> This is running on Linux compiled for an Athlon64.
>
> I see the problem when both transcoding and just playing back.  The
> video looks fine.
>
> FFmpeg version SVN-r6280, Copyright (c) 2000-2006 Fabrice Bellard, et al.
>   configuration:  --enable-libogg --enable-vorbis --enable-faad
> --enable-faac --enable-xvid --enable-x264 --enable-a52 --enable-dts
> --enable-dc1394 --enable-gpl --enable-mp3lame --enable-swscaler
> --enable-pp --extra-cflags=-march=athlon64 -g --extra-ldflags=-g
>   libavutil version: 49.0.1
>   libavcodec version: 51.20.0
>   libavformat version: 50.6.0
>   built on Oct 21 2006 13:02:17, gcc: 4.1.0 (SUSE Linux)
> Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'test.3gp':
>   Duration: 00:03:28.4, start: 0.000000, bitrate: 223 kb/s
>   Stream #0.0(und): Audio: amr_nb, 8000 Hz, mono
>   Stream #0.1(und): Video: h263, yuv420p, 352x288, 29.97 fps(r)
> Assuming NTSC for target.
> File 'test.vob' already exists. Overwrite ? [y/N] y
> Output #0, dvd, to 'test.vob':
>   Stream #0.0: Video: mpeg2video, yuv420p, 720x480, q=2-31, 6000 kb/s,
> 29.97 fps(c)
>   Stream #0.1: Audio: mp2, 48000 Hz, mono, 128 kb/s
> Stream mapping:
>   Stream #0.1 -> #0.0
>   Stream #0.0 -> #0.1
>
>   
I forgot to provide a link:

http://updat.free.fr/CreatedWithSUPER/video/1/h263+amrNb.3GP

This video fails with just periodic noise for the audio.