New submission from liug <[EMAIL PROTECTED]>:

I compiled ffmpeg with 3gp support and tried to test a file
http://samples.mplayerhq.hu/mobileVideo_3gp/Kylie_Live.3gp

ffmpeg -i Kylie_Live.3gp test4.flv
FFmpeg version SVN-r10671, Copyright (c) 2000-2007 Fabrice Bellard, et al.
 configuration: --enable-libmp3lame --enable-libogg
--enable-libvorbis --enable-libfaad --enable-libfaadbin
--enable-libfaac --enable-gpl --enable-libamr-nb --enable-libamr-wb
 libavutil version: 49.5.0
 libavcodec version: 51.44.0
 libavformat version: 51.14.0
 built on Oct  5 2007 23:08:15, gcc: 4.1.1 20070105 (Red Hat 4.1.1-52)

Seems stream 0 codec frame rate differs from container frame rate:
1000.00 (1000/1) -> 5.00 (5/1)
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'Kylie_Live.3gp':
 Duration: 00:00:28.0, start: 0.000000, bitrate: 28 kb/s
 Stream #0.0(eng): Video: mpeg4, yuv420p, 160x120,  5.00 fps(r)
 Stream #0.1(eng): Audio: libamr_nb, 8000 Hz, mono
 Stream #0.2(eng): Data: mp4s / 0x7334706D
 Stream #0.3(eng): Data: mp4s / 0x7334706D
Output #0, flv, to 'test4.flv':
 Stream #0.0(eng): Video: flv, yuv420p, 160x120, q=2-31, 200 kb/s,  5.00 fps(c)
 Stream #0.1(eng): Audio: libmp3lame, 8000 Hz, mono, 64 kb/s
Stream mapping:
 Stream #0.0 -> #0.0
 Stream #0.1 -> #0.1
Press [q] to stop encoding
frame=  140 fps=  0 q=2.0 Lsize=     552kB time=28.0 bitrate= 161.5kbits/s
video:175kB audio:219kB global headers:0kB muxing overhead 40.110021%

When I play the flv file, I can hear the audio distortion as compared
the orginal 3gp file.

----------
messages: 774
nosy: liug
priority: normal
status: new
substatus: new
title: 3gp audio distortion
type: bug

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FFmpeg issue tracker <[EMAIL PROTECTED]>
<https://roundup.mplayerhq.hu/roundup/ffmpeg/issue213>
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