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• Video won't play on iphone

  18 octobre 2016, par Merc

  I have an app that places videos online, and cannot find a way to get iPhones to actually play them.

  ffprobe says :

    merc@mercs-thinkpad:/disk/home/merc/Downloads$ ffprobe 5801005ff1861ba1729757fbffprobe version 2.8.8-0ubuntu0.16.04.1 Copyright (c) 2007-2016 the FFmpeg developers
  
      built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.2) 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
  
      WARNING: library configuration mismatch
  
      avcodec     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 --enable-version3 --disable-doc --disable-programs --disable-avdevice --disable-avfilter --disable-avformat --disable-avresample --disable-postproc --disable-swscale --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libvo_aacenc --enable-libvo_amrwbenc
  
      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
  
    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '5801005ff1861ba1729757fb':
  
      Metadata:
  
        major_brand     : isom
  
        minor_version   : 512
  
        compatible_brands: isomiso2avc1mp41
  
        encoder         : Lavf57.50.100
  
      Duration: 00:00:12.37, start: 0.021333, bitrate: 993 kb/s
  
        Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 928 kb/s, 29.83 fps, 29.83 tbr, 11456 tbn, 59.67 tbc (default)
  
        Metadata:
  
          handler_name    : VideoHandler
  
        Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, mono, fltp, 70 kb/s (default)
  
        Metadata:
  
          handler_name    : SoundHandler

  The video is here

  The file was created using ffmpeg from within the app.

  Is this a codec problem ? What shall I do to make sure iPhones can actually play them ?

• Error opening filters : Running ffmpeg through Groovy and ProcessBuilder

  30 octobre 2016, par smeeb

  This question involves the popular Linux media processing utility "ffmpeg", but I think its really a Java 8 ProcessBuilder question at its core. Or possibly an issue w/ Groovy GStrings.

  The ffmpeg command to split an MP4 video into frames/images based on a sampling rate is :

  ffmpeg -i /some/path/to/video.mp4 -vf "select=not(mod(n\,${samplingRate}))" -vsync vfr -q:v 2 img_%d.jpg

  Where ${samplingRate} is a positive integer and represents the number of frames to skip in between creating each frame. So for instance, if you had a video with 430 frames in it, and wanted to sample every 50th frame, your command would be :

  ffmpeg -i /some/path/to/video.mp4 -vf "select=not(mod(n\,50))" -vsync vfr -q:v 2 img_%d.jpg

  Which would then create 8 (or maybe 9, not gonna do the math for a pretend example) JPG files called img_1.jpg, img_2.jpg, ...etc. The first image would be the 50th frame in the video. The second image would be the 100th frame, etc. I have ran the above command directly from a terminal and confirmed that it is correct and succeeds without errors.

  I have a Groovy app, and am trying to run this ffmpeg command via a Java 8 ProcessBuilder, and am having issues with the select= argument. Currently I have :

  int numSamples = 50
  
  Process frameSamplerProc = new ProcessBuilder(
  
      'ffmpeg',
  
      '-i',
  
      "/home/myuser/some/path/to/video.mp4",
  
      '-vf',
  
      "\"select=not(mod(n\\,${numSamples}))\"",
  
      '-vsync',
  
      'vfr',
  
      '-q:v',
  
      '2',
  
      'sample%d.jpg'
  
  ).redirectErrorStream(true).start()
  
  
  
  frameSamplerProc.inputStream.eachLine { fsamplerLine ->
  
      println(fsamplerLine)
  
  }

  When I run thise code, I don’t get any errors, but I do see errors in ffmpeg’s output :

  ffmpeg version N-81995-gd790e48 Copyright (c) 2000-2016 the FFmpeg developers
  
  // Omitting the next ~50 lines of output as it all looks normal
  
  
  
  Metadata:
  
    creation_time   : 2016-10-27T20:20:01.000000Z
  
    handler_name    : SoundHandle
  
  [AVFilterGraph @ 0x3eddc80] No such filter: '"select'
  
  Error opening filters!

  I’m wondering if I’m not escaping the select argument properly or if I’m passing in a bad array to the ProcessBuilder. Can anybody spot where I’m going awry ?

• Android FFMPEG do nothing

  16 octobre 2016, par Anton A.

  I try to scale down video on Android device using FFMPEG.
  OnCreate of Activity where I call scaleVideo(), also initialization of FFMPEG and binaries load.

  private void scaleVideo(String path) throws FFmpegCommandAlreadyRunningException, IOException {
  
      File copy = new File(DESTINATION_PATH + FilenameUtils.getBaseName(path) + "_scaled." + FilenameUtils.getExtension(path));
  
  
  
      if (!copy.exists())
  
          copy.createNewFile();
  
  
  
      String cmd = "-i " + path + " -vf scale=320:-1 " + copy.getPath();
  
      String[] command = cmd.split(" ");
  
      fFmpeg.execute(command, new FFmpegExecuteResponseHandler() {
  
          @Override
  
          public void onSuccess(String message) {
  
              Log.i("FFmpeg", message);
  
              mProgressDialog.cancel();
  
  
  
              runOnUiThread(() -> Toast.makeText(TrimmerActivity.this, getString(R.string.video_saved_at, copy.getPath()), Toast.LENGTH_SHORT).show());
  
  
  
              VideoModel videoModel = new VideoModel();
  
              videoModel.setPath(copy.getPath());
  
              videoModel.save();
  
  
  
              finish();
  
          }
  
  
  
          @Override
  
          public void onProgress(String message) {
  
              Log.i("FFmpeg", message);
  
          }
  
  
  
          @Override
  
          public void onFailure(String message) {
  
              Log.e("FFmpeg", message);
  
          }
  
  
  
          @Override
  
          public void onStart() {
  
              Log.i("FFmpeg", "on start");
  
          }
  
  
  
          @Override
  
          public void onFinish() {
  
              Log.i("FFmpeg", "on finish");
  
          }
  
      });
  
  }

  And as output I get :

  I/FFmpeg: on start
  
  D/FFmpeg: Running publishing updates method
  
  I/FFmpeg: ffmpeg version n3.0.1 Copyright (c) 2000-2016 the FFmpeg developers
  
  I/FFmpeg:   built with gcc 4.8 (GCC)
  
  I/FFmpeg:   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=
  
  I/FFmpeg:   libavutil      55. 17.103 / 55. 17.103
  
  I/FFmpeg:   libavcodec     57. 24.102 / 57. 24.102
  
  I/FFmpeg:   libavformat    57. 25.100 / 57. 25.100
  
  I/FFmpeg:   libavdevice    57.  0.101 / 57.  0.101
  
  I/FFmpeg:   libavfilter     6. 31.100 /  6. 31.100
  
  I/FFmpeg:   libswscale      4.  0.100 /  4.  0.100
  
  I/FFmpeg:   libswresample   2.  0.101 /  2.  0.101
  
  I/FFmpeg:   libpostproc    54.  0.100 / 54.  0.100
  
  I/FFmpeg: Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/MP4_20161015_001403.mp4':
  
  I/FFmpeg:   Metadata:
  
  I/FFmpeg:     major_brand     : iso6
  
  I/FFmpeg:     minor_version   : 1
  
  I/FFmpeg:     compatible_brands: mp42iso6avc1isom
  
  I/FFmpeg:     creation_time   : 2016-10-14 21:14:03
  
  I/FFmpeg:   Duration: 00:00:02.10, start: 0.000000, bitrate: 19564 kb/s
  
  I/FFmpeg:     Stream #0:0(eng): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p, 1920x1080, 19403 kb/s, SAR 1:1 DAR 16:9, 14.75 fps, 15 tbr, 90k tbn, 180k tbc (default)
  
  I/FFmpeg:     Metadata:
  
  I/FFmpeg:       rotate          : 90
  
  I/FFmpeg:       creation_time   : 2016-10-14 21:13:52
  
  I/FFmpeg:     Side data:
  
  I/FFmpeg:       displaymatrix: rotation of -90.00 degrees
  
  I/FFmpeg:     Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 156 kb/s (default)
  
  I/FFmpeg:     Metadata:
  
  I/FFmpeg:       creation_time   : 2016-10-14 21:13:52

  Video output and input are correct. Files exist and video player can recognize input.
  And that’s all. CPU/GPU/Memory do nothing and no callbacks called.
  That my first time using FFMPEG, so I don’t know what to do.