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• IplImage crop and rotate - Android

  26 février 2015, par Ganesh

  I’m using ffmpeg to video capture for 30 seconds.

  @Override
  
          public void onPreviewFrame(byte[] data, Camera camera) {
  
              if (yuvIplimage != null && recording && rec) 
  
                  {
  
                      new SaveFrame().execute(data);
  
                  }
  
              }
  
          }

  save frame class is below

  private class SaveFrame extends AsyncTask {
  
              long t;
  
              protected File doInBackground(byte[]... arg) {
  
  
  
                  t = 1000 * (System.currentTimeMillis() - firstTime - pausedTime);
  
                  toSaveFrames++;
  
                  File pathCache = new File(Environment.getExternalStorageDirectory()+"/DCIM", (System.currentTimeMillis() / 1000L)+ "_" + toSaveFrames + ".tmp");
  
                  BufferedOutputStream bos;
  
                  try {
  
                      bos = new BufferedOutputStream(new FileOutputStream(pathCache));
  
                      bos.write(arg[0]);
  
                      bos.flush();
  
                      bos.close();
  
                  } catch (FileNotFoundException e) {
  
                      e.printStackTrace();
  
                      pathCache = null;
  
                      toSaveFrames--;
  
                  } catch (IOException e) {
  
                      e.printStackTrace();
  
                      pathCache = null;
  
                      toSaveFrames--;
  
                  }
  
                  return pathCache;
  
  
  
  
  
              }
  
              @Override
  
              protected void onPostExecute(File filename)
  
              {
  
                  if(filename!=null)
  
                  {
  
                      savedFrames++;
  
                      tempList.add(new FileFrame(t,filename));
  
                  }
  
              }
  
          }

  finally i add all frames with crop and rotation

  private class AddFrame extends AsyncTask {
  
          private int serial = 0;
  
          @Override
  
          protected Void doInBackground(Void... params) {
  
  
  
              for(int i=0; i/                                      final int startY = 640*(480-480)/2;
  
  //                                      final int lenY = 640*480;
  
  //                                      yuvIplimage.getByteBuffer().put(bytes, startY, lenY);
  
  //                                      final int startVU = 640*480+ 640*(480-480)/4;
  
  //                                      final int lenVU = 640* 480/2;
  
  //                                      yuvIplimage.getByteBuffer().put(bytes, startVU, lenVU);
  
  
  
                      if (tempList.get(i).time > recorder.getTimestamp()) {
  
                          recorder.setTimestamp(tempList.get(i).time);
  
                      }
  
  
  
                      image = cropImage(image);
  
                      image = rotate(image, 270);
  
  //                                       image = rotateImage(image);
  
                      recorder.record(image);
  
                      Log.i(LOG_TAG, "record " + i);
  
                      image = null;
  
                      serial++;
  
                      publishProgress(serial);
  
                  } catch (FileNotFoundException e) {
  
                      e.printStackTrace();
  
                  } catch (IOException e) {
  
                      e.printStackTrace();
  
                  } catch (com.googlecode.javacv.FrameRecorder.Exception e) {
  
                      e.printStackTrace();
  
                  }
  
              }
  
              return null;
  
          }
  
          @Override
  
          protected void onProgressUpdate(Integer... serial) {
  
              int value = serial[0];
  
              creatingProgress.setProgress(value);
  
          }
  
          @Override
  
          protected void onPostExecute(Void v)
  
          {
  
              creatingProgress.dismiss();
  
              if (recorder != null && recording) {
  
                  recording = false;
  
                  Log.v(LOG_TAG,"Finishing recording, calling stop and release on recorder");
  
                  try {
  
                      recorder.stop();
  
                      recorder.release();
  
                      finish();
  
                      startActivity(new Intent(RecordActivity.this,AnswerViewActivity.class));
  
                  } catch (FFmpegFrameRecorder.Exception e) {
  
                      e.printStackTrace();
  
                  }
  
                  recorder = null;
  
              }
  
          }
  
      }

  my crop and rotate method are below

  private IplImage cropImage(IplImage src)
  
      {
  
          cvSetImageROI(src, r);
  
          IplImage cropped = IplImage.create(imageHeight, imageHeight, IPL_DEPTH_8U, 2);
  
          cvCopy(src, cropped);
  
          return cropped;
  
      }
  
  
  
      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);
  
  
  
          //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;
  
      }

  my final video crop and rotate but green frames and colored frames mixed with this.

  How to fix this problem. I’m not aware of iplimage. In some blogs they mention its YUV format. first u need to convert Y and then convert UV.

  How to solve this problem ?

• How to set audio format from an ffmpeg filter ?

  4 août 2020, par Vadim Kantorov

  Is it possible to set the audio format just with an ffmpeg filter ?

  


  My usecase is programmatic usage, so if it's possible to do with filters, that would simplify everything.

  


  # create sample s16 audio
ffmpeg -f lavfi -i "sine=frequency=1000:duration=5" -c:a pcm_s16le -ar 8000 test.wav

# works
ffmpeg -i test.wav -y -af 'aresample=osf=flt,aformat=sample_fmts=flt' -f f32le test_f32.raw

# fails
ffmpeg -i test.wav -y -af 'aresample=osf=flt,aformat=sample_fmts=flt' test_f32.raw
# [NULL @ 0x56042863d980] Unable to find a suitable output format for 'test_f32.raw'


  


• ffmpeg filter_complex concat never completes

  10 juillet 2020, par seawolf

  I am trying to concatenate mp4 files into a single file. I am attempting to use the concat filter directly for reasons independent from this question (so -i list.txt is not a valid solution). All video files in question are between 4 and 20 minutes in length.

  


  What I am executing :

  


  % ffmpeg -i f01.mp4 -i f02.mp4 -filter_complex "[0:v][0:a][1:v][1:a]concat=n=2:v=1:a=1[v][a]" -map "[v]" -map "[a]" output.mp4


  


  This is my understanding of the form of this command from references such as FFmpeg Filters Documentation : concat and Concatenate Videos Together Using FFMPEG !.

  


  What happens :

  


  ffmpeg gives a lot of output as it checks the metadata for each stream and then begins processing. After a short duration (several seconds to a minute or so, seems to be prortional to the duration of the first video) I start seeing messages like this :

  


  More than 1000 frames duplicated
More than 10000 frames duplicated     512kB time=00:00:00.12 bitrate=32771.0kbits/s dup=33365 drop=0 speed=0.00449x
More than 100000 frames duplicated   1280kB time=00:00:00.17 bitrate=61442.1kbits/s dup=66730 drop=0 speed=0.00272x


  


  ... and then the process never completes. If I leave my computer running for 24 hours, ffmpeg is still using max available CPU (200-300%). The output file is 48 bytes in length.

  


  Note : the inputs are only a few minutes each, so individually re-encoding the inputs would take only a few minutes each.

  


  Note : if I change the command to use f01.mp4 for both source 0 and source 1, the command completes as expected in under 5 minutes :

  


  % # example that works:
% # note, however, that this just repeats the same source twice
% ffmpeg -i f01.mp4 -i f01.mp4 -filter_complex "[0:v][0:a][1:v][1:a]concat=n=2:v=1:a=1[v][a]" -map "[v]" -map "[a]" output.mp4


  


  Full output :

  


  Here is the complete output of a run in case it's helpful :

  


  % ffmpeg -i f01.mp4 -i f02.mp4 -filter_complex "[0:v][0:a][1:v][1:a]concat=n=2:v=1:a=1[v][a]" -map "[v]" -map "[a]" output.mp4
ffmpeg version 4.3 Copyright (c) 2000-2020 the FFmpeg developers
  built with Apple clang version 11.0.3 (clang-1103.0.32.62)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/4.3_2 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-libsoxr --enable-videotoolbox --disable-libjack --disable-indev=jack
  libavutil      56. 51.100 / 56. 51.100
  libavcodec     58. 91.100 / 58. 91.100
  libavformat    58. 45.100 / 58. 45.100
  libavdevice    58. 10.100 / 58. 10.100
  libavfilter     7. 85.100 /  7. 85.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  7.100 /  5.  7.100
  libswresample   3.  7.100 /  3.  7.100
  libpostproc    55.  7.100 / 55.  7.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'f01.mp4':
  Metadata:
    major_brand     : mp42
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    creation_time   : 2020-06-04T21:34:26.000000Z
    encoder         : HandBrake 1.3.2 2020050300
  Duration: 00:04:14.66, start: 0.000000, bitrate: 525 kb/s
    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, smpte170m/smpte170m/bt709), 708x478 [SAR 8:9 DAR 944:717], 366 kb/s, 29.97 fps, 29.97 tbr, 90k tbn, 180k tbc (default)
    Metadata:
      creation_time   : 2020-06-04T21:34:26.000000Z
      handler_name    : VideoHandler
    Stream #0:1(jpn): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 149 kb/s (default)
    Metadata:
      creation_time   : 2020-06-04T21:34:26.000000Z
      handler_name    : Stereo
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'f02.mp4':
  Metadata:
    major_brand     : mp42
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    creation_time   : 2020-06-04T21:38:15.000000Z
    encoder         : HandBrake 1.3.2 2020050300
  Duration: 00:06:30.95, start: 0.000000, bitrate: 1328 kb/s
    Stream #1:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, smpte170m/smpte170m/bt709), 708x478 [SAR 8:9 DAR 944:717], 1179 kb/s, 29.97 fps, 30 tbr, 90k tbn, 180k tbc (default)
    Metadata:
      creation_time   : 2020-06-04T21:38:15.000000Z
      handler_name    : VideoHandler
    Stream #1:1(jpn): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 140 kb/s (default)
    Metadata:
      creation_time   : 2020-06-04T21:38:15.000000Z
      handler_name    : Stereo
File 'output.mp4' already exists. Overwrite? [y/N] y
Stream mapping:
  Stream #0:0 (h264) -> concat:in0:v0
  Stream #0:1 (aac) -> concat:in0:a0
  Stream #1:0 (h264) -> concat:in1:v0
  Stream #1:1 (aac) -> concat:in1:a0
  concat:out:v0 -> Stream #0:0 (libx264)
  concat:out:a0 -> Stream #0:1 (aac)
Press [q] to stop, [?] for help
[mp4 @ 0x7ff130014000] Frame rate very high for a muxer not efficiently supporting it.
Please consider specifying a lower framerate, a different muxer or -vsync 2
[libx264 @ 0x7ff130021200] using SAR=8/9
[libx264 @ 0x7ff130021200] MB rate (1350000000) > level limit (16711680)
[libx264 @ 0x7ff130021200] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0x7ff130021200] profile High, level 6.2, 4:2:0, 8-bit
[libx264 @ 0x7ff130021200] 264 - core 160 r3011 cde9a93 - H.264/MPEG-4 AVC codec - Copyleft 2003-2020 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'output.mp4':
  Metadata:
    major_brand     : mp42
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.45.100
    Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p(progressive), 708x478 [SAR 8:9 DAR 944:717], q=-1--1, 1000k tbn, 1000k tbc (default)
    Metadata:
      encoder         : Lavc58.91.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
    Stream #0:1: Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
    Metadata:
      encoder         : Lavc58.91.100 aac
More than 1000 frames duplicated
More than 10000 frames duplicated     512kB time=00:00:00.12 bitrate=32771.0kbits/s dup=33365 drop=0 speed=0.00449x
More than 100000 frames duplicated   1280kB time=00:00:00.17 bitrate=61442.1kbits/s dup=66730 drop=0 speed=0.00272x
frame=667333 fps=1079 q=33.0 size=   14848kB time=00:00:00.76 bitrate=158379.2kbits/s dup=667312 drop=0 speed=0.00124x