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• Creating automated ffmpeg converter

  27 janvier 2019, par Jeffrey Moser

  I am trying to create an automated process using ffmpeg and am having issues understanding how to adapt the code to automator.

  The code works beautifully in the terminal, but requires each filename to me entered manually. I am trying to automate the process.

  for f in "$@"
  
  do
  
  
  
  FILE= "$f"
  
  OUT=${FILE/mp4/png}
  
  OUT_WIDTH=10800
  
  OUT_HEIGHT=3600
  
  
  
  eval $(ffprobe -v error -of flat=s=_ -select_streams v:0 -show_entries stream=height,width "${FILE}")
  
  IN_WIDTH=${streams_stream_0_width}
  
  IN_HEIGHT=${streams_stream_0_height}
  
  
  
   eval $(ffprobe -v error -of flat=s=_ -count_frames -select_streams v:0 -show_entries stream=nb_read_frames "${FILE}")
  
  IN_FRAMES=${streams_stream_0_nb_read_frames}
  
  
  
  W_TILES=$(bc <<< "(sqrt($OUT_WIDTH*$IN_FRAMES*$IN_HEIGHT/($IN_WIDTH*$OUT_HEIGHT))+3)")
  
  H_TILES=$(bc <<< "(sqrt($OUT_HEIGHT*$IN_FRAMES*$IN_WIDTH/($OUT_WIDTH*$IN_HEIGHT)))")
  
  
  
  W_SHRUNK=$(bc <<< "$OUT_WIDTH/$W_TILES")
  
  H_SHRUNK=$(bc <<< "$OUT_HEIGHT/$H_TILES")
  
  
  
  ffmpeg -i "${FILE}" -vf "hflip,transpose=cclock,scale=${H_SHRUNK}:${W_SHRUNK},tile=${H_TILES}x${W_TILES},transpose=clock,hflip,scale=${OUT_WIDTH}x${OUT_HEIGHT}" -an -sn -vsync 0 "${OUT}"
  
  
  
  
  
  done

  I expected the code to produce an image of every frame of the film. But instead I got a massive error message.

  The action “Run Shell Script” encountered an error: “-: line 5: /Users/jeffreymoser/21 A New Dawn.mp4: Permission denied
  
  -: line 14: ffprobe: command not found
  
  -: line 18: ffprobe: command not found
  
  (standard_in) 1: parse error
  
  (standard_in) 1: parse error
  
  (standard_in) 1: parse error
  
  (standard_in) 2: parse error
  
  (standard_in) 2: parse error
  
  -: line 29: ffmpeg: command not found
  
  -: line 5: /Users/jeffreymoser/22 Battle Hymn.mp4: Permission denied
  
  -: line 14: ffprobe: command not found
  
  -: line 18: ffprobe: command not found
  
  (standard_in) 1: parse error
  
  (standard_in) 1: parse error
  
  (standard_in) 1: parse error
  
  (standard_in) 2: parse error
  
  (standard_in) 2: parse error
  
  -: line 29: ffmpeg: command not found
  
  -: line 5: /Users/jeffreymoser/23 Reckless.mp4: Permission denied
  
  -: line 14: ffprobe: command not found
  
  -: line 18: ffprobe: command not found
  
  (standard_in) 1: parse error
  
  (standard_in) 1: parse error
  
  (standard_in) 1: parse error
  
  (standard_in) 2: parse error
  
  (standard_in) 2: parse error
  
  -: line 29: ffmpeg: command not found
  
  -: line 5: /Users/jeffreymoser/24 Showdown.mp4: Permission denied
  
  -: line 14: ffprobe: command not found
  
  -: line 18: ffprobe: command not found
  
  (standard_in) 1: parse error
  
  (standard_in) 1: parse error
  
  (standard_in) 1: parse error
  
  (standard_in) 2: parse error
  
  (standard_in) 2: parse error
  
  -: line 29: ffmpeg: command not found
  
  -: line 5: /Users/jeffreymoser/25 Wedding Bells.mp4: Permission denied
  
  -: line 14: ffprobe: command not found
  
  -: line 18: ffprobe: command not found
  
  (standard_in) 1: parse error
  
  (standard_in) 1: parse error
  
  (standard_in) 1: parse error
  
  (standard_in) 2: parse error
  
  (standard_in) 2: parse error
  
  -: line 29: ffmpeg: command not found

• RGB to x264 : Strange color render

  16 janvier 2014, par Maypeur

  i’m trying to make a video from an OpenGl context.

  I’m Using glReadPixel, to be sure RGB buffer data is Ok i save it into a bmp file, wich i can read correctly.

  My .h264 video is encoded but there are some artefact and i don’t understand why.
  I tried a lot of different parameters for the x264_param_t but anything better !

  Bitmap saved (OpenGL real data) : Bitmap from OpenGl (1mo)

  Raw h264 with error : Raw h264 video (1mo)

  OpenGl ReadPixel :

  int nSize = ClientHeight * ClientWidth * 3;
  
  GLubyte *inBuff = new GLubyte[nSize];
  
  glReadBuffer(GL_FRONT);
  
  glReadPixels(0, 0, ldwidth, ldheight, GL_BGR, GL_UNSIGNED_BYTE, inBuff);

  The params define :

  x264_param_default(&mX264_param_t);
  
  x264_param_default_preset(&mX264_param_t, "placebo", "film");
  
  
  
  mX264_param_t.i_csp = X264_CSP_BGR;
  
  mX264_param_t.i_threads = 6;
  
  mX264_param_t.i_width = mWidth;
  
  mX264_param_t.i_height = mHeight;
  
  
  
  mX264_param_t.i_fps_num = mFps;
  
  mX264_param_t.i_fps_den = 1;
  
  
  
  // Intra refres:
  
  mX264_param_t.i_keyint_max = mFps;
  
  mX264_param_t.b_intra_refresh = 1;
  
  
  
  //Rate control:
  
  mX264_param_t.rc.i_rc_method = X264_RC_CRF;
  
  mX264_param_t.rc.f_rf_constant = 25;
  
  mX264_param_t.rc.f_rf_constant_max = 35;
  
  
  
  int bps = 5000;
  
  mX264_param_t.rc.i_bitrate = bps;
  
  mX264_param_t.rc.i_vbv_max_bitrate = bps;
  
  mX264_param_t.i_bframe = 2;
  
  mX264_param_t.i_keyint_min = mFps / 4;
  
  //For streaming:
  
  mX264_param_t.b_repeat_headers = 1;
  
  mX264_param_t.b_annexb = 1;
  
  mX264_param_t.i_log_level = X264_LOG_DEBUG;
  
  x264_param_apply_profile(&mX264_param_t, "baseline");
  
  
  
  mpEncoder = x264_encoder_open(&mX264_param_t);
  
  x264_encoder_parameters(mpEncoder, &mX264_param_t);
  
  
  
  
  
  
  
  mpPictureOut = new x264_picture_t();
  
  mpPictureIn = new x264_picture_t();
  
  
  
  x264_picture_alloc(mpPictureIn, X264_CSP_BGR | X264_CSP_VFLIP, mWidth, mHeight);

  Then the encoding loop :

  mpPictureIn->img.i_csp = X264_CSP_BGR;
  
  
  
  mpPictureIn->img.i_plane = 1;
  
  mpPictureIn->img.i_stride[0] = 3 * mWidth;
  
  mpPictureIn->img.plane[0] = rgbframe;
  
  
  
  mpPictureIn->i_pts = mFrameCount;
  
  mpPictureIn->i_type = X264_TYPE_AUTO;
  
  
  
  mpPictureOut->i_pts = mFrameCount;
  
  
  
  int i_nals;
  
  x264_nal_t* nals;
  
  int frame_size = x264_encoder_encode(mpEncoder, &nals, &i_nals, mpPictureIn, mpPictureOut);
  
  
  
  if(frame_size > 0)
  
  {
  
  mpFileOut->write_frame(nals[0].p_payload, frame_size, mpPictureOut);
  
  mFrameCount++;
  
  }

  The write frame :

  int TVideoFileWriter::write_frame(uint8_t *p_nalu, int i_size, x264_picture_t *p_picture)
  
  {
  
  if(fwrite(p_nalu, i_size, 1, mFileHandle))
  
      return i_size;
  
  return -1;
  
  }

• JPEG 2000 decoder for DCinema

  22 avril 2013, par Nicolas Bertrand

  JPEG 2000 decoder for DCinema