[FFmpeg-trac] #3955(undetermined:new): native vorbis encoder produces noise

FFmpeg trac at avcodec.org
Wed Sep 17 02:05:30 CEST 2014


#3955: native vorbis encoder produces noise
-------------------------------------+-------------------------------------
             Reporter:  hxuanyu      |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Converted a 5.1 channel video into webm with latest ffmpeg (using native
 vorbis for audio encoder). But can hear noise not exists in  source video.

 Was able to reproduce this issue with 2 videos.

 Below is the command used to convert.


 {{{
 $ ffmpeg.exe -i Stereotest.mp4 -acodec vorbis -strict -2 test.webm
 ffmpeg version N-66289-gb76d613 Copyright (c) 2000-2014 the FFmpeg
 developers
   built on Sep 15 2014 22:02:10 with gcc 4.8.3 (GCC)
   configuration: --enable-gpl --enable-version3 --disable-w32threads
 --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r
 --enable-gnutls --enable-iconv --enable-libass --enable-libbluray
 --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme
 --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame
 --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg
 --enable-libopus --enable-librtmp --enable-libschroedinger --enable-
 libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-
 libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-
 libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-
 libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-
 decklink --enable-zlib
   libavutil      54.  7.100 / 54.  7.100
   libavcodec     56.  1.100 / 56.  1.100
   libavformat    56.  4.101 / 56.  4.101
   libavdevice    56.  0.100 / 56.  0.100
   libavfilter     5.  1.100 /  5.  1.100
   libswscale      3.  0.100 /  3.  0.100
   libswresample   1.  1.100 /  1.  1.100
   libpostproc    53.  0.100 / 53.  0.100
 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'Stereotest.mp4':
   Metadata:
     major_brand     : mp42
     minor_version   : 0
     compatible_brands: isommp42
     creation_time   : 2013-12-23 05:20:05
   Duration: 00:00:20.04, start: 0.000000, bitrate: 159 kb/s
     Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 /
 0x31637661), yuv420p, 480x360, 60 kb/s, 29.97 fps, 29.97 tbr, 60k tbn,
 59.94 tbc (default)
     Metadata:
       handler_name    : VideoHandler
     Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo,
 fltp, 95 kb/s (default)
     Metadata:
       creation_time   : 2013-12-23 05:20:05
       handler_name    : IsoMedia File Produced by Google, 5-11-2011
 File 'test.webm' already exists. Overwrite ? [y/N] y
 [libvpx @ 04404a60] v1.3.0
 Output #0, webm, to 'test.webm':
   Metadata:
     major_brand     : mp42
     minor_version   : 0
     compatible_brands: isommp42
     encoder         : Lavf56.4.101
     Stream #0:0(und): Video: vp8 (libvpx), yuv420p, 480x360, q=-1--1, 200
 kb/s, 29.97 fps, 1k tbn, 29.97 tbc (default)
     Metadata:
       handler_name    : VideoHandler
       encoder         : Lavc56.1.100 libvpx
     Stream #0:1(und): Audio: vorbis, 44100 Hz, stereo, fltp (default)
     Metadata:
       creation_time   : 2013-12-23 05:20:05
       handler_name    : IsoMedia File Produced by Google, 5-11-2011
       encoder         : Lavc56.1.100 vorbis
 Stream mapping:
   Stream #0:0 -> #0:0 (h264 (native) -> vp8 (libvpx))
   Stream #0:1 -> #0:1 (aac (native) -> vorbis (native))
 Press [q] to stop, [?] for help
 frame=  600 fps=145 q=0.0 Lsize=     560kB time=00:00:20.06 bitrate=
 228.5kbits/s
 video:130kB audio:416kB subtitle:0kB other streams:0kB global headers:3kB
 muxing overhead: 2.403836%



 $ ffmpeg.exe -i Original51.mkv -acodec vorbis -strict -2 test.webm
 ffmpeg version N-66289-gb76d613 Copyright (c) 2000-2014 the FFmpeg
 developers
   built on Sep 15 2014 22:02:10 with gcc 4.8.3 (GCC)
   configuration: --enable-gpl --enable-version3 --disable-w32threads
 --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r
 --enable-gnutls --enable-iconv --enable-libass --enable-libbluray
 --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme
 --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame
 --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg
 --enable-libopus --enable-librtmp --enable-libschroedinger --enable-
 libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-
 libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-
 libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-
 libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-
 decklink --enable-zlib
   libavutil      54.  7.100 / 54.  7.100
   libavcodec     56.  1.100 / 56.  1.100
   libavformat    56.  4.101 / 56.  4.101
   libavdevice    56.  0.100 / 56.  0.100
   libavfilter     5.  1.100 /  5.  1.100
   libswscale      3.  0.100 /  3.  0.100
   libswresample   1.  1.100 /  1.  1.100
   libpostproc    53.  0.100 / 53.  0.100
 Input #0, matroska,webm, from 'Original51.mkv':
   Metadata:
     ENCODER         : Lavf55.33.100
   Duration: 00:00:46.63, start: 0.000000, bitrate: 605 kb/s
     Stream #0:0: Video: h264 (High), yuv420p, 800x600 [SAR 1:1 DAR 4:3], 8
 fps, 8 tbr, 1k tbn, 16 tbc (default)
     Stream #0:1: Audio: aac, 44100 Hz, stereo, fltp (default)
 File 'test.webm' already exists. Overwrite ? [y/N] y
 [libvpx @ 037d47e0] v1.3.0
 Output #0, webm, to 'test.webm':
   Metadata:
     encoder         : Lavf56.4.101
     Stream #0:0: Video: vp8 (libvpx), yuv420p, 800x600 [SAR 1:1 DAR 4:3],
 q=-1--1, 200 kb/s, 8 fps, 1k tbn, 8 tbc (default)
     Metadata:
       encoder         : Lavc56.1.100 libvpx
     Stream #0:1: Audio: vorbis, 44100 Hz, stereo, fltp (default)
     Metadata:
       encoder         : Lavc56.1.100 vorbis
 Stream mapping:
   Stream #0:0 -> #0:0 (h264 (native) -> vp8 (libvpx))
   Stream #0:1 -> #0:1 (aac (native) -> vorbis (native))
 Press [q] to stop, [?] for help
 frame=  373 fps= 49 q=0.0 Lsize=     944kB time=00:00:46.62 bitrate=
 165.8kbits/s
 video:421kB audio:503kB subtitle:0kB other streams:0kB global headers:3kB
 muxing overhead: 2.077811%
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/3955>
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