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• FFMPEG format settings for android

  24 juillet 2016, par Jemil Riahi

  String[] args = {
  
            "-i" ,
  
            path,
  
            "-codec:v",
  
            "libx264",
  
            "-profile:v",
  
            "high",
  
            "-preset",
  
            "slow",
  
            "-b:v",
  
            "500k",
  
            "-maxrate",
  
            "500k",
  
            "-bufsize",
  
            "1000k",
  
            "-vf",
  
            "scale=-1:480",
  
            "-threads",
  
            "0",
  
            "/storage/emulated/0/Download/testing.mp4"
  
  };

  This is the format i am going for. It works fine on some videos. But it failed on one.

  Error code (Dont know why it is so tabbed out)

  configuration: --target-os=linux --cross-prefix=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --cpu=cortex-a8 --enable-runtime-cpudetect --sysroot=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-libass --enable-libfreetype --enable-libfribidi --enable-libmp3lame --enable-fontconfig --enable-pthreads --disable-debug --disable-ffserver --enable-version3 --enable-hardcoded-tables --disable-ffplay --disable-ffprobe --enable-gpl --enable-yasm --disable-doc --disable-shared --enable-static --pkg-config=/home/vagrant/SourceCode/ffmpeg-android/ffmpeg-pkg-config --prefix=/home/vagrant/SourceCode/ffmpeg-android/build/armeabi-v7a --extra-cflags='-I/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all' --extra-ldflags='-L/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-libs='-lpng -lexpat -lm' --extra-cxxflags=
  
      libavutil      55. 17.103 / 55. 17.103
  
      libavcodec     57. 24.102 / 57. 24.102
  
      libavformat    57. 25.100 / 57. 25.100
  
      libavdevice    57.  0.101 / 57.  0.101
  
      libavfilter     6. 31.100 /  6. 31.100
  
      libswscale      4.  0.100 /  4.  0.100
  
      libswresample   2.  0.101 /  2.  0.101
  
      libpostproc    54.  0.100 / 54.  0.100
  
    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/Download/big_buck_bunny_720p_50mb.mp4':
  
      Metadata:
  
        major_brand     : isom
  
        minor_version   : 512
  
        compatible_brands: isomiso2avc1mp41
  
        creation_time   : 1970-01-01 00:00:00
  
        encoder         : Lavf53.24.2
  
      Duration: 00:04:41.90, start: 0.000000, bitrate: 1488 kb/s
  
        Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 1100 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
  
        Metadata:
  
          creation_time   : 1970-01-01 00:00:00
  
          handler_name    : VideoHandler
  
        Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp, 383 kb/s (default)
  
        Metadata:
  
          creation_time   : 1970-01-01 00:00:00
  
          handler_name    : SoundHandler
  
    [libx264 @ 0xf70c4800] width not divisible by 2 (853x480)
  
    Output #0, mp4, to '/storage/emulated/0/Download/testing.mp4':
  
      Metadata:
  
        major_brand     : isom
  
        minor_version   : 512
  
        compatible_brands: isomiso2avc1mp41
  
        encoder         : Lavf53.24.2
  
        Stream #0:0(und): Video: h264, none, q=2-31, 128 kb/s, SAR 2560:2559 DAR 0:0, 25 fps (default)
  
        Metadata:
  
          creation_time   : 1970-01-01 00:00:00
  
          handler_name    : VideoHandler
  
          encoder         : Lavc57.24.102 libx264
  
        Stream #0:1(und): Audio: aac, 0 channels, 128 kb/s (default)
  
        Metadata:
  
          creation_time   : 1970-01-01 00:00:00
  
          handler_name    : SoundHandler
  
          encoder         : Lavc57.24.102 aac
  
    Stream mapping:
  
      Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  
      Stream #0:1 -> #0:1 (aac (native) -> aac (native))
  
    Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height

  As i got it. It complains that [libx264 @ 0xf70c4800] width not divisible by 2 (853x480) I have no idea how to fix this issue so that every video can work.

  The inspiration i got for my format settings comes from :
  https://www.virag.si/2012/01/web-video-encoding-tutorial-with-ffmpeg-0-9/

  Does anyone have any tips on what i should do to fix this.

• build : Drop support for old versions of libdc1394

  29 novembre 2016, par Diego Biurrun

  build : Drop support for old versions of libdc1394
  The libdc1394 API transition was finished close to a decade ago.
  

  • [DBH] configure
  • [DBH] libavdevice/libdc1394.c

• FFMpeg convert VOB to H264 and multi language

  26 octobre 2016, par gduh

  I try to convert VOB files to H264. I know it seems to be crazy to do that but the goal is to use it with the Apple TV.

  To just converting a VOB file to mp4 with the right audio stream is not really a problem.

  The problem is when the VOB file contains multi-sequences in different languages. For example, in the mp4’s file I will have 3 seconds of video including for example a book on the screen in english, then, the same 3 seconds with the book in french and so on...
  But with the VOB file I will have only the 3 seconds in the right language.

  When I check the VOB file, I only see one stream #0.0 for the video.

  So my question is, how can I avoid to include the differents videos sequences with these different languages ?

  Thx for your help.