[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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