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• save sequence of frame as BMP not PNG

  27 décembre 2013, par user2922938

  I extract 100 frames from video file and i save each frame as (.bmp) but i found that each frame format is PNG not BMP , how can I save sequence of frame (format as BMP not PNG as show in picture)in C# ?

  string name;            
  
  for ( int i = 0; i < 100; i++ )
  
  {
  
      Bitmap videoFrame = video.ReadVideoFrame( );  
  
      name = (i).ToString().PadLeft(5, '0');
  
      videoFrame.Save(@"D:\frames\" + name  + ".bmp");
  
      videoFrame.Dispose( );
  
  }
  
  
  
  video.Close( );
  
  MessageBox.Show(" Complete Convert video to sequence of image","Convert");

  

• Fluent ffmpeg how to user save callback

  7 août 2018, par Desert P

  I am using fluent-ffmpeg
  GIT
  I want to further process the saved file. But save do not have any callback. how can I use the saved file with promise.
  My code is

  ffmpeg(filename)
  
      .toFormat('mp3')
  
      .on('error', (err) => {
  
         console.log('An error occurred: ' + err.message);
  
      })
  
      .on('progress', (progress) => {
  
          console.log('Processing: ' + progress.targetSize + ' KB converted');
  
  })
  
  .on('end', () => {
  
          console.log('Processing finished !');
  
  })
  
  .save(`./${newname}.mp3`)

  My problem is "save" function do not have a callback. so how could I save the output on S3 again ?

• avformat/matroskaenc : Don't ignore tags of chapters written late

  29 avril 2020, par Andreas Rheinhardt

  avformat/matroskaenc : Don't ignore tags of chapters written late
  The Matroska muxer writes the Chapters early when chapters were already
  
  available when writing the header ; in this case any tags pertaining to
  
  these chapters get written, too.
  Yet if no chapters had been supplied before writing the header, Chapters
  
  can also be written when writing the trailer if any are supplied. Tags
  
  belonging to these chapters were up until now completely ignored.
  This commit changes this : Writing the tags belonging to chapters has
  
  been moved to mkv_write_chapters(). If mkv_write_tags() has not been
  
  called yet (i.e. when chapters are written when writing the header),
  
  the AVIOContext for writing the ordinary Tags element is used, but not
  
  output, as this is left to mkv_write_tags() in order to only write one
  
  Tags element. Yet if mkv_write_tags() has already been called,
  
  mkv_write_chapters() will output a Tags element of its own which only
  
  contains the tags for chapters.
  When chapters are available initially, the corresponding tags will now
  
  be the first tags in the Tags element ; but the ordering of tags in Tags
  
  is irrelevant anyway.
  This commit also makes chapter_id_offset local to mkv_write_chapters()
  
  as it is used only there and not reused at all.
  Potentially writing a second Tags element means that the maximum number
  
  of SeekHead entries had to be incremented. All the changes to FATE
  
  result from the ensuing increase in the amount of space reserved for the
  
  SeekHead (21 bytes more).
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
  

  • [DH] libavformat/matroskaenc.c
  • [DH] tests/fate/matroska.mak
  • [DH] tests/fate/wavpack.mak
  • [DH] tests/ref/fate/aac-autobsf-adtstoasc
  • [DH] tests/ref/fate/binsub-mksenc
  • [DH] tests/ref/fate/matroska-flac-extradata-update
  • [DH] tests/ref/fate/rgb24-mkv
  • [DH] tests/ref/fate/webm-dash-chapters
  • [DH] tests/ref/lavf-fate/av1.mkv
  • [DH] tests/ref/lavf/mka
  • [DH] tests/ref/lavf/mkv
  • [DH] tests/ref/lavf/mkv_attachment
  • [DH] tests/ref/seek/lavf-mkv