Sur d’autres sites (15609)

• ffmpeg hls video recording timing inforamtion is inaccurate

  27 juin 2018, par Haris

  I am recording the rtsp stream in HLS format which is working fine with below command.

  ~/bin/ffmpeg -i rtsp://10.0.7.39:554/media/live/1/1 -c:a aac -c:v copy -hls_list_size 65535 -hls_time 2 live.m3u8

  But when I check the the duration of each ts file with live.m3u8 file content the value is not accurate.

  Here is the live.m3u8

  #EXTM3U
  
  #EXT-X-VERSION:3
  
  #EXT-X-TARGETDURATION:2
  
  #EXT-X-MEDIA-SEQUENCE:0
  
  #EXTINF:2.000000,
  
  live0.ts
  
  #EXTINF:2.000000,
  
  live1.ts
  
  #EXTINF:1.200000,
  
  live2.ts
  
  #EXTINF:2.500000,
  
  live3.ts
  
  #EXTINF:2.000000,
  
  live4.ts
  
  #EXTINF:2.600000,
  
  live5.ts
  
  #EXTINF:1.700000,
  
  live6.ts
  
  #EXT-X-ENDLIST

  And when I check the timing information of the ts file live2.ts using the command,

    ~/bin/ffprobe -i live2.ts -show_entries format=duration -v quiet -of csv="p=0"

  I am getting the value 2.136000 where as in m3u8 file it is 1.20000.

  I have build the latest FFMPEG based on official guild https://trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu.

  OS : Ubuntu 12.04

  ffmpeg Version

  $~/bin//ffmpeg -version
  
  
  
  
  
  ffmpeg version N-91369-g4ac88ba Copyright (c) 2000-2018 the FFmpeg developers
  
  built with gcc 4.8 (Ubuntu 4.8.1-2ubuntu1~12.04)
  
  configuration: --prefix=/home/haris/ffmpeg_build --pkg-config-flags=--static --extra-cflags=-I/home/haris/ffmpeg_build/include --extra-ldflags=-L/home/haris/ffmpeg_build/lib --extra-libs='-lpthread -lm' --bindir=/home/haris/bin --enable-gpl --enable-libaom --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-nonfree
  
  libavutil      56. 18.102 / 56. 18.102
  
  libavcodec     58. 20.104 / 58. 20.104
  
  libavformat    58. 17.101 / 58. 17.101
  
  libavdevice    58.  4.101 / 58.  4.101
  
  libavfilter     7. 25.100 /  7. 25.100
  
  libswscale      5.  2.100 /  5.  2.100
  
  libswresample   3.  2.100 /  3.  2.100
  
  libpostproc    55.  2.100 / 55.  2.100

  Note

  If I tested the same command in Ubuntu 16.04 where ffmpeg installed with apt-get every thing works fine.

  Here is the ffmpeg details

  $ ~/bin/ffmpeg -version
  
  ffmpeg version 2.8.14-0ubuntu0.16.04.1 Copyright (c) 2000-2018 the FFmpeg developers
  
  built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.9) 20160609
  
  configuration: --prefix=/usr --extra-version=0ubuntu0.16.04.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --cc=cc --cxx=g++ --enable-gpl --enable-shared --disable-stripping --disable-decoder=libopenjpeg --disable-decoder=libschroedinger --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librtmp --enable-libschroedinger --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzvbi --enable-openal --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzmq --enable-frei0r --enable-libx264 --enable-libopencv
  
  libavutil      54. 31.100 / 54. 31.100
  
  libavcodec     56. 60.100 / 56. 60.100
  
  libavformat    56. 40.101 / 56. 40.101
  
  libavdevice    56.  4.100 / 56.  4.100
  
  libavfilter     5. 40.101 /  5. 40.101
  
  libavresample   2.  1.  0 /  2.  1.  0
  
  libswscale      3.  1.101 /  3.  1.101
  
  libswresample   1.  2.101 /  1.  2.101
  
  libpostproc    53.  3.100 / 53.  3.100

  What could be the cause, any help will be appreciated.

• asfdec : Account for different Format Data sizes

  8 février 2017, par Alexandra Hájková

  asfdec : Account for different Format Data sizes
  Some muxers may use the BMP_HEADER Format Data size instead
  
  of the ASF-specific one.
  Bug-Id : 1020
  
  CC : libav-stable@libav.org
  Signed-off-by : Diego Biurrun <diego@biurrun.de>
  

  • [DBH] libavformat/asfdec.c
  • [DBH] libavformat/avidec.c
  • [DBH] libavformat/riff.h
  • [DBH] libavformat/riffdec.c
  • [DBH] libavformat/wtv.c

• matroskadec : parse the channel layout mask for FLAC

  26 mai 2014, par Anton Khirnov

  matroskadec : parse the channel layout mask for FLAC
  It is commonly stored in a vorbiscomment block in codec private data.
  

  • [DH] libavformat/Makefile
  • [DH] libavformat/flacdec.c
  • [DH] libavformat/matroskadec.c
  • [DH] libavformat/oggdec.h
  • [DH] libavformat/oggparsecelt.c
  • [DH] libavformat/oggparseflac.c
  • [DH] libavformat/oggparseogm.c
  • [DH] libavformat/oggparseopus.c
  • [DH] libavformat/oggparsespeex.c
  • [DH] libavformat/oggparsetheora.c
  • [DH] libavformat/oggparsevorbis.c