[FFmpeg-trac] #5937(avcodec:new): Flac decoding - sample/frame number mismatch in adjacent frames

FFmpeg trac at avcodec.org
Thu Nov 10 14:37:00 EET 2016


#5937: Flac decoding - sample/frame number mismatch in adjacent frames
---------------------------------+--------------------------------------
             Reporter:  q3cpma   |                     Type:  defect
               Status:  new      |                 Priority:  normal
            Component:  avcodec  |                  Version:  git-master
             Keywords:  flac     |               Blocked By:
             Blocking:           |  Reproduced by developer:  0
Analyzed by developer:  0        |
---------------------------------+--------------------------------------
 Summary of the bug:
 sample/frame number mismatch in adjacent frames
 This apparently recurring error is still appearing with latest master, so
 I thought I'd make a report. There's no discernable problem in the sound
 itself, but this error appears randomly when decoding flac files.
 Note that flac -t (flac 1.3.1) doesn't have anything to say about the
 problematic files.
 How to reproduce:
 {{{
 ~/ffmpeg-git-20161110-64bit-static/ffmpeg -threads 1 -i "11 - Suite en Gm,
 FK nv24 - Bourrée, Trio I & II.flac" -c:a pcm_s16le -f null -
 ffmpeg version N-82314-g863ebe6-static http://johnvansickle.com/ffmpeg/
 Copyright (c) 2000-2016 the FFmpeg developers
   built with gcc 5.4.1 (Debian 5.4.1-3) 20161019
   configuration: --enable-gpl --enable-version3 --enable-static --disable-
 debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio
 --cc=gcc-5 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-
 gray --enable-libass --enable-libebur128 --enable-libfreetype --enable-
 libfribidi --enable-libmp3lame --enable-libopencore-amrnb --enable-
 libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp
 --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libvidstab
 --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-
 libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-
 libzimg
   libavutil      55. 36.100 / 55. 36.100
   libavcodec     57. 66.101 / 57. 66.101
   libavformat    57. 57.100 / 57. 57.100
   libavdevice    57.  2.100 / 57.  2.100
   libavfilter     6. 66.100 /  6. 66.100
   libswscale      4.  3.100 /  4.  3.100
   libswresample   2.  4.100 /  2.  4.100
   libpostproc    54.  2.100 / 54.  2.100
 Input #0, flac, from '11 - Suite en Gm, FK nv24 - Bourrée, Trio I &
 II.flac':
   Metadata:
     ALBUM           : Divers
     REPLAYGAIN_ALBUM_GAIN: -2.28 dB
     ARTIST          : W.F. Bach
     TITLE           : Suite en Gm, FK nv24 - Bourrée, Trio I & II
     REPLAYGAIN_TRACK_PEAK: 0.7671
     REPLAYGAIN_TRACK_GAIN: -2.24 dB
     REPLAYGAIN_ALBUM_PEAK: 1.0000
     track           : 11
     TRACKTOTAL      : 22
   Duration: 00:05:41.40, start: 0.000000, bitrate: 889 kb/s
     Stream #0:0: Audio: flac, 44100 Hz, stereo, s16
     Side data:
       replaygain: track gain - -2.240000, track peak - 0.000018, album
 gain - -2.280000, album peak - 0.000023,
 Output #0, null, to 'pipe:':
   Metadata:
     ALBUM           : Divers
     REPLAYGAIN_ALBUM_GAIN: -2.28 dB
     ARTIST          : W.F. Bach
     TITLE           : Suite en Gm, FK nv24 - Bourrée, Trio I & II
     REPLAYGAIN_TRACK_PEAK: 0.7671
     REPLAYGAIN_TRACK_GAIN: -2.24 dB
     REPLAYGAIN_ALBUM_PEAK: 1.0000
     track           : 11
     TRACKTOTAL      : 22
     encoder         : Lavf57.57.100
     Stream #0:0: Audio: pcm_s16le, 44100 Hz, stereo, s16, 1411 kb/s
     Metadata:
       encoder         : Lavc57.66.101 pcm_s16le
 Stream mapping:
   Stream #0:0 -> #0:0 (flac (native) -> pcm_s16le (native))
 Press [q] to stop, [?] for help
 [NULL @ 0x57cb700] sample/frame number mismatch in adjacent frames
 size=N/A time=00:05:41.40 bitrate=N/A speed= 585x
 video:0kB audio:58811kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: unknown
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/5937>
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