[FFmpeg-trac] #1958(undetermined:new): mp3 24khz (in wav): overreads

FFmpeg trac at avcodec.org
Sat Nov 24 15:59:54 CET 2012


#1958: mp3 24khz (in wav): overreads
-------------------------------------+-------------------------------------
               Reporter:  ami_stuff  |                  Owner:
                   Type:  defect     |                 Status:  new
               Priority:  normal     |              Component:
                Version:             |  undetermined
  unspecified                        |               Keywords:
             Blocked By:             |               Blocking:
Reproduced by developer:  0          |  Analyzed by developer:  0
-------------------------------------+-------------------------------------
 This happens only with 24khz mode.

 I can hear some distortions.

 {{{
 C:\>ffmpeg -i 24khz_2ch_160kbps.wav -t 2 -f null -
 ffmpeg version N-46755-ge70144c Copyright (c) 2000-2012 the FFmpeg
 developers
   built on Nov 15 2012 02:38:20 with gcc 4.5.0 (GCC) 20100414 (Fedora
 MinGW 4.5.
 0-1.fc14)
   configuration: --prefix=/var/www/users/research/ffmpeg/snapshots/build
 --arch=
 x86 --target-os=mingw32 --cross-prefix=i686-pc-mingw32- --cc='ccache i686
 -pc-min
 gw32-gcc' --enable-w32threads --enable-memalign-hack --enable-runtime-
 cpudetect
 --enable-cross-compile --enable-static --disable-shared --extra-
 libs='-lws2_32 -
 lwinmm -lpthread' --extra-cflags='--static
 -I/var/www/users/research/ffmpeg/snap
 shots/build/include' --extra-ldflags='-static
 -L/var/www/users/research/ffmpeg/s
 napshots/build/lib' --enable-bzlib --enable-zlib --enable-gpl --enable-
 version3
 --enable-nonfree --enable-libx264 --enable-libspeex --enable-libtheora
 --enable-
 libvorbis --enable-libfaac --enable-libxvid --enable-libopencore-amrnb
 --enable-
 libopencore-amrwb --enable-libmp3lame --enable-libvpx --disable-
 decoder=libvpx
   libavutil      52.  6.100 / 52.  6.100
   libavcodec     54. 71.100 / 54. 71.100
   libavformat    54. 36.100 / 54. 36.100
   libavdevice    54.  3.100 / 54.  3.100
   libavfilter     3. 23.100 /  3. 23.100
   libswscale      2.  1.102 /  2.  1.102
   libswresample   0. 16.100 /  0. 16.100
   libpostproc    52.  1.100 / 52.  1.100
 [wav @ 0x1edc3c0] max_analyze_duration 5000000 reached at 5016000
 [wav @ 0x1edc3c0] Estimating duration from bitrate, this may be inaccurate
 Input #0, wav, from '24khz_2ch_160kbps.wav':
   Duration: 00:00:33.12, bitrate: 127 kb/s
     Stream #0:0: Audio: mp3 (U[0][0][0] / 0x0055), 24000 Hz, stereo, s16,
 128 kb
 /s
 Output #0, null, to 'pipe:':
   Metadata:
     encoder         : Lavf54.36.100
     Stream #0:0: Audio: pcm_s16le, 24000 Hz, stereo, s16, 768 kb/s
 Stream mapping:
   Stream #0:0 -> #0:0 (mp3 -> pcm_s16le)
 Press [q] to stop, [?] for help
 [mp3 @ 0x1edcb60] overread, skip -7 enddists: -6 -6
 [mp3 @ 0x1edcb60] overread, skip -6 enddists: -5 -5
 [mp3 @ 0x1edcb60] overread, skip -9 enddists: -1 -1
 [mp3 @ 0x1edcb60] overread, skip -7 enddists: -3 -3
     Last message repeated 1 times
 [mp3 @ 0x1edcb60] overread, skip -6 enddists: -2 -2
 [mp3 @ 0x1edcb60] overread, skip -6 enddists: -4 -4
 [mp3 @ 0x1edcb60] overread, skip -7 enddists: -4 -4
 size=       0kB time=00:00:02.01 bitrate=   0.0kbits/s
 video:0kB audio:189kB subtitle:0 global headers:0kB muxing overhead
 -100.000000%
 }}}

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1958>
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