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• Improve the quality of webm video using ffmpeg

  3 octobre 2013, par Leke

  I'm trying out two codecs and was wondering if I could improve the results of the webm output ...

  ffmpeg -i test.ts -t 10 -f webm -vcodec libvpx output.webm

  to match the quality of the mp4 output...

  ffmpeg -i test.ts -t 10 -b 1500k -vcodec libx264 output.mp4

  What settings would give me the best webm rip ?

  Thanks.

  Edit :
  Here is an error output when trying some rip improvements...

  ffmpeg -i test.ts -c:v libvpx -crf 4 -b:v 1M -c:a libvorbis output.webm
  
  
  
  ffmpeg version 0.8.6-4:0.8.6-0ubuntu0.12.04.1, Copyright (c) 2000-2013 the Libav developers
  
    built on Apr  2 2013 17:00:59 with gcc 4.6.3
  
  *** THIS PROGRAM IS DEPRECATED ***
  
  This program is only provided for compatibility and will be removed in a future release. Please use avconv instead.
  
  [mpeg2video @ 0x9cde5c0] mpeg_decode_postinit() failure
  
      Last message repeated 4 times
  
  [mpegts @ 0x9cda240] max_analyze_duration reached
  
  [mpegts @ 0x9cda240] PES packet size mismatch
  
  Input #0, mpegts, from 'test.ts':
  
    Duration: 00:03:59.53, start: 4630.845422, bitrate: 1977 kb/s
  
      Stream #0.0[0x20b]: Video: mpeg2video (Main), yuv420p, 720x576 [PAR 64:45 DAR 16:9], 15000 kb/s, 25.60 fps, 25 tbr, 90k tbn, 50 tbc
  
      Stream #0.1[0x28f]: Audio: mp2, 48000 Hz, stereo, s16, 224 kb/s
  
  
  
  Unrecognized option 'c:v'
  
  Failed to set value 'libvpx' for option 'c:v'

• ffmpeg need some quality advices

  2 octobre 2013, par xakepp35

  help ! current dir : contains files in .bmp formt ! I need to get *.avi at 4fps from frames i have alredy got in current forlder

  D:\WORK\MyFrames>"C:\Users\Den\Downloads\ffmpeg-latest-win32-static\ffmpeg-201 30928-git-c461265-win32-static\bin\ffmpeg.exe" -i d:\WORK\MyFrames\IMG_%4d.bmp
  
   -r 4 -vcodec h264 -y out.avi
  
  ffmpeg version N-56715-gc461265 Copyright (c) 2000-2013 the FFmpeg developers built on Sep 28 2013 18:02:00 with gcc 4.8.1 (GCC)
  
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
  
  isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
  
  le-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetyp
  
  e --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --ena
  
  ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-l
  
  ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libsp
  
  eex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aa
  
  cenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavp
  
  ack --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
  
  libavutil      52. 46.100 / 52. 46.100
  
  libavcodec     55. 33.101 / 55. 33.101
  
  libavformat    55. 18.104 / 55. 18.104
  
  libavdevice    55.  3.100 / 55.  3.100
  
  libavfilter     3. 88.100 /  3. 88.100
  
  libswscale      2.  5.100 /  2.  5.100
  
  libswresample   0. 17.103 /  0. 17.103
  
  libpostproc    52.  3.100 / 52.  3.100
  
  [image2 @ 022cfa60] Could find no file with path 'd:\WORK\MyFrames\IMG_%4d.bmp
  
  ' and index in the range 0-4
  
  d:\WORK\Serega28-3\IMG_%4d.bmp: No such file or directory

• Error LIBSWRESAMPLE_0 Compiling ffmpeg Kubuntu 12.04

  30 septembre 2013, par lobo115

  i try to compile ffmpeg in ubuntu 12.04 with this tuto But i had a error with a library so i use this to solve it :

  sudo apt-get update
  
  sudo apt-get -y install build-essential checkinstall git libfaac-dev libgpac-dev \
  
    libjack-jackd2-dev libmp3lame-dev libopencore-amrnb-dev libopencore-amrwb-dev \
  
    libsdl1.2-dev libtheora-dev libva-dev libvdpau-dev libvorbis-dev libx11-dev \
  
    libxfixes-dev texi2html yasm zlib1g-dev

  and this

  cd
  
  git clone git://git.videolan.org/x264
  
  cd x264
  
  ./configure --enable-static
  
  make
  
  sudo checkinstall --pkgname=x264 --pkgversion="3:$(./version.sh | \
  
    awk -F'[" ]' '/POINT/{print $4"+git"$5}')" --backup=no --deldoc=yes \
  
    --fstrans=no --default

  then i have a problem with another library so i use a apt-get install to add libgsm1-dev, then i could install it, but now when i tried to execute it said :

  ffmpeg: relocation error: /usr/local/lib/libavfilter.so.3: symbol swr_get_class, version LIBSWRESAMPLE_0 not defined in file libswresample.so.0 with link time reference

  So i look for help, and tried

  export LD_LIBRARY_PATH=/usr/local/lib
  
  sudo ldconfig -v

  but it didn't work, could you help me ?
  Thz

  PS:When i tried to install WINFF with synaptic or apt-get it said that it will install ffmpeg.