[FFmpeg-user] some mp3 files can not be decoded by recent FFmpeg

[Kirill Gavrilov]

Hi all!

After migration to FFmpeg 2.0 I have observed that several old mp3 files (9
from 100) can not be played anymore with the same error - no 'data' tag
found:
./ffmpeg -i anb3.mp3
ffmpeg version N-55410-gd4db7c3 Copyright (c) 2000-2013 the FFmpeg
developers
  built on Aug 10 2013 10:58:01 with gcc 4.2.1 (GCC) (Apple Inc. build
5666) (dot 3)
  configuration: --enable-swscale --enable-shared --disable-static
--enable-memalign-hack --enable-avfilter --enable-hardcoded-tables
--enable-pthreads --disable-libopenjpeg --enable-runtime-cpudetect
--enable-vda --disable-debug --enable-version3
  libavutil      52. 41.100 / 52. 41.100
  libavcodec     55. 24.100 / 55. 24.100
  libavformat    55. 13.102 / 55. 13.102
  libavdevice    55.  3.100 / 55.  3.100
  libavfilter     3. 82.100 /  3. 82.100
  libswscale      2.  4.100 /  2.  4.100
  libswresample   0. 17.103 /  0. 17.103
[wav @ 0x10180e820] Format wav probed with size=2048 and score=99
[wav @ 0x10180e820] id3v2 ver:2 flags:00 len:85
[wav @ 0x10180e820] no 'data' tag found
[AVIOContext @ 0x101111260] Statistics: 32768 bytes read, 0 seeks
anb3.mp3: Invalid data found when processing input

There no such issues with older release 0.10.2:
[wav @ 0x10100e820] max_analyze_duration 5000000 reached at 5015510
Input #0, wav, from 'anb3.mp3':
  Duration: 00:03:11.82, bitrate: 12 kb/s
    Stream #0:0: Audio: mp3 (U[0][0][0] / 0x0055), 44100 Hz, stereo, s16,
128 kb/s

I may suppose that these files were encoded with broken encoder but it is
weird that only recent FFmpeg can not play them now...
Could somebody tell me is it regression or new "feature"?

I have prepared 300 KB cut from one sample:
http://sview.cifro-city.ru/trash/anb3.mp3
-----------------------------------------------
Kirill Gavrilov,
Software designer.