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• ffmpeg decoding on Android

  29 novembre 2013, par Kernald

  I'm currently trying to use ffmpeg on Android. I built ffmpeg using https://github.com/halfninja/android-ffmpeg-x264 (I adapted it to not use libx264 and build with ndk-r9b, using GCC 4.6). I try to trim an MP4 file. However, the input file fails to open :

  11-28 10:59:18.494 : INFO/com.rfc.video.VideoKit(4125) : ffmpeg
  11-28 10:59:18.494 : INFO/com.rfc.video.VideoKit(4125) : -i
  11-28 10:59:18.494 : INFO/com.rfc.video.VideoKit(4125) : /storage/emulated/0/DCIM/20131126_173903.mp4
  11-28 10:59:18.494 : INFO/com.rfc.video.VideoKit(4125) : -ss
  11-28 10:59:18.494 : INFO/com.rfc.video.VideoKit(4125) : 2
  11-28 10:59:18.494 : INFO/com.rfc.video.VideoKit(4125) : -t
  11-28 10:59:18.494 : INFO/com.rfc.video.VideoKit(4125) : 4
  11-28 10:59:18.494 : INFO/com.rfc.video.VideoKit(4125) : -vcodec
  11-28 10:59:18.494 : INFO/com.rfc.video.VideoKit(4125) : copy
  11-28 10:59:18.494 : INFO/com.rfc.video.VideoKit(4125) : -acodec
  11-28 10:59:18.494 : INFO/com.rfc.video.VideoKit(4125) : copy
  11-28 10:59:18.494 : INFO/com.rfc.video.VideoKit(4125) : /storage/emulated/0/DCIM/trimmed-000-20131126_173903.mp4
  11-28 10:59:18.494 : INFO/com.rfc.video.VideoKit(4125) : Running main
  11-28 10:59:18.494 : INFO/Videokit(4125) : Initializing AV codecs
  11-28 10:59:18.494 : INFO/Videokit(4125) : ffmpeg version 0.9.2, Copyright (c) 2000-2012 the FFmpeg developers
  11-28 10:59:18.494 : INFO/Videokit(4125) : built on Nov 27 2013 15:38:26 with gcc 4.6 20120106 (prerelease)
  11-28 10:59:18.494 : INFO/Videokit(4125) : configuration : —enable-cross-compile —arch=arm5te —enable-armv5te —target-os=linux —disable-stripping —prefix=../output —disable-neon —enable-version3 —ar=arm-linux-androideabi-ar —disable-shared —enable-static —enable-gpl —enable-memalign-hack —cc=arm-linux-androideabi-gcc —ld=arm-linux-androideabi-ld —extra-cflags='-fPIC -DANDROID -D__thumb__ -mthumb -Wno-deprecated' —disable-everything —enable-decoder=mjpeg —enable-demuxer=mjpeg —enable-parser=mjpeg —enable-demuxer=image2 —enable-muxer=mp4 —enable-decoder=rawvideo —enable-protocol=file —enable-hwaccels —disable-ffmpeg —disable-ffplay —disable-ffprobe —disable-ffserver —disable-network —enable-filter=buffer —enable-filter=buffersink —disable-demuxer=v4l —disable-demuxer=v4l2 —disable-indev=v4l —disable-indev=v4l2
  11-28 10:59:18.494 : INFO/Videokit(4125) : libavutil    51. 32. 0 / 51. 32. 0
  11-28 10:59:18.494 : INFO/Videokit(4125) : libavcodec   53. 42. 4 / 53. 42. 4
  11-28 10:59:18.494 : INFO/Videokit(4125) : libavformat  53. 24. 2 / 53. 24. 2
  11-28 10:59:18.494 : INFO/Videokit(4125) : libavdevice  53.  4. 0 / 53.  4. 0
  11-28 10:59:18.494 : INFO/Videokit(4125) : libavfilter   2. 53. 0 /  2. 53. 0
  11-28 10:59:18.494 : INFO/Videokit(4125) : libswscale    2.  1. 0 /  2.  1. 0
  11-28 10:59:18.494 : INFO/Videokit(4125) : libpostproc  51.  2. 0 / 51.  2. 0
  11-28 10:59:18.504 : ERROR/Videokit(4125) : /storage/emulated/0/DCIM/20131126_173903.mp4 : Invalid data found when processing input
  

  I digged into ffmpeg's code, and found the error :

  static int opt_input_file(OptionsContext *o, const char *opt, const char *filename)
  
  {
  
  
  
  // ...
  
  
  
  ic->video_codec_id   = video_codec_name ?
  
      find_codec_or_die(video_codec_name   , AVMEDIA_TYPE_VIDEO   , 0)->id : CODEC_ID_NONE;
  
  ic->audio_codec_id   = audio_codec_name ?
  
      find_codec_or_die(audio_codec_name   , AVMEDIA_TYPE_AUDIO   , 0)->id : CODEC_ID_NONE;
  
  ic->subtitle_codec_id= subtitle_codec_name ?
  
      find_codec_or_die(subtitle_codec_name, AVMEDIA_TYPE_SUBTITLE, 0)->id : CODEC_ID_NONE;
  
  ic->flags |= AVFMT_FLAG_NONBLOCK;
  
  ic->interrupt_callback = int_cb;
  
  
  
  if (loop_input) {
  
      LOGW(
  
          "-loop_input is deprecated, use -loop 1\n"
  
          "Note, both loop options only work with -f image2\n"
  
      );
  
      ic->loop_input = loop_input;
  
  }
  
  
  
  /* open the input file with generic avformat function */
  
  err = avformat_open_input(&ic, filename, file_iformat, &format_opts);
  
  if (err < 0) {
  
      print_error(filename, err);
  
      exit_program(1);
  
  }
  
  assert_avoptions(format_opts);
  
  
  
  // ...
  
  
  
  }

  As indicated in the logcat, err is here equal to AVERROR_INVALIDDATA. I don't understand the reason however : the mp4 codec is enabled, as far as I can tell. Any hint on how to solve it ?

  Edit : I added more ffmpeg code. I'm pretty sure it's a codec issue now : ic->video_codec_id is set to CODEC_ID_NONE, which causes ic to be set to NULL and return a failure in avformat_open_input().

• Using FFMPEG with Powershell

  19 mai 2017, par Caulen

  I am using Windows Server Edition 2012 and am very new to using Powershell. Basically, I am trying to convert a bunch of video files that are in a directory to .flv. The code I am using is this :

  $inProcessPath = "E:\Random Videos\In Process\$env:username\"
  
  
  
  $oldVideos = Get-ChildItem -Include @("*.mp4", "*.avi", "*.divx", "*.mov", "*.mpg", "*.wmv", "*.mkv") -Path $inProcessPath -Recurse #gets all of the videos
  
  
  
  cd "E:\FFMPEG\bin\"
  
  
  
  foreach ($oldVideo in $oldVideos) {
  
      $newVideo = [io.path]::ChangeExtension($oldSong.FullName, '.flv')
  
      .\ffmpeg.exe -i $oldVideo -y -async 1 -b 2000k -ar 44100 -ac 2 -v 0 -f flv -vcodec libx264 -preset superfast $newVideo 
  
  }

  Whenever I run this I don’t get any error messages but ffmpeg doesn’t run either. I’m sure I’m overlooking something but have no idea what that could be. I’ve searched the website and compared code to others and still have no idea.

  Any help would be very much appreciated.

• Rotation on Video frame image makes video quality low and becomes green ffmpeg opencv

  21 novembre 2013, par bindal

  I am working on one application in which i have to record video on touch which includes pause recording so , i am using FFmpegFrameRecorder for that

  But when i am recording video with rear camera then in onpreviewframe
  i am getting yuvIplImage in portrait mode that is correct but when i
  am recording with front camera in portrait mode then in onPreviewframe
  i am getting image upside down , so my half, so from that result my
  half video is showing in correct portrait mode and remaining half
  video id showing upside down, so i am applying rotation on yuvIplImage
  when recording from front camera

  Here is my onPreviewFrame Method

   @Override
  
              public void onPreviewFrame(byte[] data, Camera camera) {
  
  
  
                  long frameTimeStamp = 0L;
  
                  if (mAudioTimestamp == 0L && firstTime > 0L)
  
                      frameTimeStamp = 1000L * (System.currentTimeMillis() - firstTime);
  
                  else if (mLastAudioTimestamp == mAudioTimestamp)
  
                      frameTimeStamp = mAudioTimestamp + frameTime;
  
                  else {
  
                      long l2 = (System.nanoTime() - mAudioTimeRecorded) / 1000L;
  
                      frameTimeStamp = l2 + mAudioTimestamp;
  
                      mLastAudioTimestamp = mAudioTimestamp;
  
                  }
  
                  synchronized (mVideoRecordLock) {
  
                      if (recording && rec && lastSavedframe != null
  
                              && lastSavedframe.getFrameBytesData() != null
  
                              && yuvIplImage != null) {
  
                          mVideoTimestamp += frameTime;
  
                          if (lastSavedframe.getTimeStamp() > mVideoTimestamp)
  
                              mVideoTimestamp = lastSavedframe.getTimeStamp();
  
                          try {
  
                              yuvIplImage.getByteBuffer().put(
  
                                      lastSavedframe.getFrameBytesData());
  
                              videoRecorder.setTimestamp(lastSavedframe
  
                                      .getTimeStamp());
  
  
  
                              // if (defaultCameraId == 1) {
  
                              // CvSize size = new CvSize(yuvIplImage.height(),
  
                              // yuvIplImage.width());
  
                              // IplImage yuvIplImage2 = opencv_core.cvCreateImage(
  
                              // size, yuvIplImage.depth(),
  
                              // yuvIplImage.nChannels());
  
                              //
  
                              // videoRecorder.record(yuvIplImage2);
  
                              // } else {
  
  
  
                              // }
  
  
  
  
  
  
  
                              if (defaultCameraId == 1) {
  
                                  yuvIplImage = rotate(yuvIplImage, 270);
  
  
  
                                  videoRecorder.record(yuvIplImage);
  
                              }else
  
                              {
  
                                  videoRecorder.record(yuvIplImage);
  
                              }
  
                              // else
  
  
  
                              // opencv_core.cvTranspose(yuvIplImage, yuvIplImage);
  
                          } catch (com.googlecode.javacv.FrameRecorder.Exception e) {
  
                              e.printStackTrace();
  
                          }
  
                      }
  
                      lastSavedframe = new SavedFrames(data, frameTimeStamp);
  
                  }
  
              }
  
          } 

  Here is rotation function

  public static IplImage rotate(IplImage image, double angle) {
  
      IplImage copy = opencv_core.cvCloneImage(image);
  
  
  
      IplImage rotatedImage = opencv_core.cvCreateImage(
  
              opencv_core.cvGetSize(copy), copy.depth(), copy.nChannels());
  
      CvMat mapMatrix = opencv_core.cvCreateMat(2, 3, opencv_core.CV_32FC1);
  
  
  
      // Define Mid Point
  
      CvPoint2D32f centerPoint = new CvPoint2D32f();
  
      centerPoint.x(copy.width() / 2);
  
      centerPoint.y(copy.height() / 2);
  
  
  
      // Get Rotational Matrix
  
      opencv_imgproc.cv2DRotationMatrix(centerPoint, angle, 1.0, mapMatrix);
  
      // opencv_core.cvReleaseImage(copy);
  
  
  
      // Rotate the Image
  
      opencv_imgproc.cvWarpAffine(copy, rotatedImage, mapMatrix,
  
              opencv_imgproc.CV_INTER_CUBIC
  
                      + opencv_imgproc.CV_WARP_FILL_OUTLIERS,
  
              opencv_core.cvScalarAll(170));
  
      opencv_core.cvReleaseImage(copy);
  
      opencv_core.cvReleaseMat(mapMatrix);
  
      return rotatedImage;
  
  }

  But Final output of video makes half of the video green

  Thanks in advance