[FFmpeg-trac] #6205(undetermined:new): Distortions in audio output when selecting input audio track 5 or higher

FFmpeg trac at avcodec.org
Tue Feb 28 18:00:26 EET 2017


#6205: Distortions in audio output when selecting input audio track 5 or higher
-------------------------------------+-------------------------------------
             Reporter:  ackjewt      |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:  git-
  undetermined                       |  master
             Keywords:  Decklink     |               Blocked By:
  SDI Audio                          |  Reproduced by developer:  0
             Blocking:               |
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:
 While using input track 5 or higher, i hear distortions in the output.
 I've attached two files, one using audio tracks 3-4
 (sdi_576i_audio_ch_3-4.avi) and one using audio tracks 5-6
 (sdi_576i_audio_ch_5-6.avi)

 Input:
 720x576i25, 8 audio tracks

 Using:
 CentOS 7
 FFmpeg-git
 Latest Decklink SDK (10.8.5)


 How to reproduce:
 {{{
 ffmpeg -report -v 9 -loglevel 99 -re -channels 8 -f decklink -i "DeckLink
 SDI at 3" -pixel_format uyvy422 -af "pan=stereo|c0=c4|c1=c5" -vn -acodec
 pcm_s16le sdi_576i_audio_ch_5-6.avi
 ffmpeg version N-83691-g7f62368 Copyright (c) 2000-2017 the FFmpeg
 developers
   built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-11)
   configuration: --prefix=/root/ffmpeg-static/target --pkg-config-
 flags=--static --extra-cflags=-I/root/ffmpeg-static/target/include
 --extra-ldflags=-L/root/ffmpeg-static/target/lib --bindir=/root/ffmpeg-
 static/bin --enable-decklink --extra-cflags=-I/usr/include/decklink-10.8.5
 --extra-ldflags=-ldl --extra-libs=-ldl --enable-ffplay --enable-ffserver
 --enable-gpl --enable-libass --enable-libfdk-aac --enable-libfreetype
 --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis
 --enable-libvpx --enable-libx264 --enable-libx265 --enable-nonfree
   libavutil      55. 47.100 / 55. 47.100
   libavcodec     57. 81.100 / 57. 81.100
   libavformat    57. 66.102 / 57. 66.102
   libavdevice    57.  3.100 / 57.  3.100
   libavfilter     6. 74.100 /  6. 74.100
   libswscale      4.  3.101 /  4.  3.101
   libswresample   2.  4.100 /  2.  4.100
   libpostproc    54.  2.100 / 54.  2.100
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/6205>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker


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