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• Android FFMPEG : images to mp4 video converting

  19 juillet 2017, par Giorgi Asaturyan

  I have tried many possible command line options with ffmpeg, however not getting this to work. Heres is my command file generator method :

   private String[] generateCommandFile() {
  
      ArrayList<string> cmd = new ArrayList&lt;>();
  
  
  
      cmd.add("-y");
  
      cmd.add("-f");
  
      cmd.add("concat");
  
      cmd.add("-safe");
  
      cmd.add("0");
  
      cmd.add("-i");
  
      String picturesTextFile = generateMergingFilesTexts();
  
      if (picturesTextFile == null) {
  
          return null;
  
      }
  
      cmd.add(picturesTextFile);
  
      cmd.add("-i");
  
      String audioTextFile;
  
      if (numberOfAudioFiles > 1) {
  
          audioTextFile = generateAudioFilesTexts();
  
      } else {
  
          audioTextFile = getAudioFilePath(audioRecordingFileName + Integer.toString(1));
  
      }
  
  
  
      cmd.add(audioTextFile);
  
  
  
      cmd.add("-vsync");
  
      cmd.add("vfr");
  
      cmd.add("-pix_fmt");
  
      cmd.add("yuv420p");
  
  
  
      String currentDateTimeString = new SimpleDateFormat("dd MMMM yyyy", Locale.US).format(Calendar.getInstance().getTime());
  
      File dirOut = new File(this.getExternalFilesDir(null), "D:T:" + currentDateTimeString);
  
      if (!dirOut.exists()) {
  
          dirOut.mkdirs();
  
      }
  
      directoryPath = dirOut.getAbsolutePath();
  
      File fileOut = new File(dirOut, "T__" + Long.toString(totalTime) + "__P__" + Integer.toString(picturesModelInfo.getNumberOfShots()) + ".mp4");
  
      cmd.add(fileOut.getAbsolutePath());
  
      Log.d(TAG, "Saving File At " + fileOut.getAbsolutePath());
  
  
  
      String[] finalCommand = new String[cmd.size()];
  
  
  
      for (int i = 0; i &lt; cmd.size(); i++) {
  
          finalCommand[i] = cmd.get(i);
  
      }
  
  
  
      String finalString = "";
  
      for (String command : finalCommand) {
  
          finalString += command;
  
      }
  
  
  
      Log.d(TAG, "Final Command Is " + finalString);
  
      return finalCommand;
  
  }
  
  </string>

  and here is my Final Command

  -y-fconcat-safe0-i/storage/emulated/0/Android/data/com.essentialsln.memtalk/files/pictures_merging.txt-i/storage/emulated/0/Android/data/com.essentialsln.memtalk/files/AudioRecording1.3gp-vsyncvfr-pix_fmtyuv420p/storage/emulated/0/Android/data/com.essentialsln.memtalk/files/D:T:19 July 2017/T__2__P__3.mp4

  The main problem is that video not playing in android default player - displays ("Cannot Play video, unsupported file type"), but it works with VLC program. ))

  Anu Suggestions ?

  Thanks

• SIMD opus pvq_search implementation

  8 juin 2017, par Ivan Kalvachev

  SIMD opus pvq_search implementation
  Explanation on the workings and methods used by the
  
  Pyramid Vector Quantization Search function
  
  could be found in the following Work-In-Progress mail threads :
  
  http://ffmpeg.org/pipermail/ffmpeg-devel/2017-June/212146.html
  
  http://ffmpeg.org/pipermail/ffmpeg-devel/2017-June/212816.html
  
  http://ffmpeg.org/pipermail/ffmpeg-devel/2017-July/213030.html
  
  http://ffmpeg.org/pipermail/ffmpeg-devel/2017-July/213436.html
  Signed-off-by : Ivan Kalvachev <ikalvachev@gmail.com>
  

  • [DH] libavcodec/opus_pvq.c
  • [DH] libavcodec/opus_pvq.h
  • [DH] libavcodec/x86/Makefile
  • [DH] libavcodec/x86/opus_dsp_init.c
  • [DH] libavcodec/x86/opus_pvq_search.asm

• FFmpeg error : ratecontrol_init : can't open stats file

  6 octobre 2017, par oldo.nicho

  I’ve setup an AWS EC2 instance running Ubuntu 14.04 and have installed FFmpeg so that I can compress and transcode video.

  I’m trying to do a two pass conversion with the following code :

  ffmpeg -i input-file.avi -codec:v libx264 -profile:v high -preset slow -b:v 500k -maxrate 500k -bufsize 1000k -vf scale=702:-1 -threads 0 -pass 1 -an -f mp4 ~/encoded/null

  and second pass :

  ffmpeg -i input-file.avi -codec:v libx264 -profile:v high -preset slow -b:v 500k -maxrate 500k -bufsize 1000k -vf scale=702:-1 -threads 0 -pass 2 -codec:a libfdk_aac -b:a 128k -f mp4 output-file.mp4

  However I get the following error :

  ffmpeg version N-77283-g91c2a33 Copyright (c) 2000-2015 the FFmpeg developers
  
    built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04)
  
    configuration: --prefix=/home/ubuntu/ffmpeg_build --pkg-config-flags=--static --extra-cflags=-I/home/ubuntu/ffmpeg_build/include --extra-ldflags=-L/home/ubuntu/ffmpeg_build/lib --bindir=/home/ubuntu/bin --enable-gpl --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libx264 --enable-nonfree
  
    libavutil      55. 11.100 / 55. 11.100
  
    libavcodec     57. 17.100 / 57. 17.100
  
    libavformat    57. 20.100 / 57. 20.100
  
    libavdevice    57.  0.100 / 57.  0.100
  
    libavfilter     6. 21.100 /  6. 21.100
  
    libswscale      4.  0.100 /  4.  0.100
  
    libswresample   2.  0.101 /  2.  0.101
  
    libpostproc    54.  0.100 / 54.  0.100
  
  Input #0, avi, from 'input-file.avi':
  
    Duration: 01:18:05.29, start: 0.000000, bitrate: 2025 kb/s
  
      Stream #0:0: Video: mpeg4 (Simple Profile) (XVID / 0x44495658), yuv420p, 720x480 [SAR 1:1 DAR 3:2], 1789 kb/s, 29.97 fps, 29.97 tbr, 29.97 tbn, 29.97 tbc
  
      Stream #0:1: Audio: ac3 ([0] [0][0] / 0x2000), 48000 Hz, stereo, fltp, 224 kb/s
  
  [libx264 @ 0x1e04240] using SAR=1/1
  
  [libx264 @ 0x1e04240] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX AVX2 FMA3 LZCNT BMI2
  
  [libx264 @ 0x1e04240] ratecontrol_init: can't open stats file
  
  Output #0, mp4, to '/home/ubuntu/encoded/null':
  
      Stream #0:0: Video: h264, none, q=2-31, 128 kb/s, SAR 1:1 DAR 0:0, 29.97 fps
  
      Metadata:
  
        encoder         : Lavc57.17.100 libx264
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (mpeg4 (native) -> h264 (libx264))
  
  Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height

  The command as written above works fine on my local computer (running OSX). Would anyone have any suggestions as to how to fix this problem ?