[Ffmpeg-devel] 3gp audio corrupt

Aaron Williams aaronw
Tue Oct 24 08:49:47 CEST 2006

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

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