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• avformat/hlsenc: fix handling of delete_segments when %v is present

  11 April 2018, by Bela Bodecs

  avformat/hlsenc: fix handling of delete_segments when %v is present
  When var_stream_map option is used, %v must appear either in segment
  
  name template or in the directory path. This latter case currently is
  
  not handled and delete_segments flag of hls_flags is broken now. This
  
  patch fix this. The root cause of the bug was that HLSSegment struct
  
  only stores the final filename part, but not the final directory path.
  
  Most of the cases, final path info is unneded, It only necessary when
  
  you want to delete old segments (e.g in case of live streaming).
  
  Without variant streams it was unnecessary to store the final directory
  
  path, because all segment were stored into the same directory. But
  
  introducing %v in directory names either require to store the final
  
  directory path into HLSSegment or associate segments with their variant
  
  streams to be able deleting them later. I have choosen the second
  
  solution and introduced a variant index data member into the segment
  
  struct.
  Signed-off-by: Bela Bodecs <bodecsb@vivanet.hu>
  
  Signed-off-by: Steven Liu <lq@onvideo.cn>
  

  • [DH] libavformat/hlsenc.c

• Concatenating image with video for Freeze frame effect

  12 May 2015, by Code_Ed_Student

  I am currently trying to achieve with ffmepg a freeze frame effect. This is something easy to do with adobe after effects shown here. However I would like to achieve a freeze frame effect(of 5 seconds duration) followed by the 15 second video for the final output video. This should amount to a final duration of 20 seconds. However with the settings below, I am getting a still image with the video following but it does not show a "freeze frame effect". How can I achieve a "freeze frame effect" in ffmpeg?

  //create image

  ffmpeg -i "/media/test/test.mp4" -ss 00:00:00.023222 -vframes 1 "/media/test/test.png"

  //create freeze image effect

  ffmpeg -i "/media/test/test.mp4" -loop 1 -i "/media/test/test.jpg" -an \
  
  -filter_complex "[1:v]trim=start=0:end=5[ol];[0:v]setpts=[nv];[nv][ol]overlay=eof_action=pass[final]" \
  
  -map '[final]' -c:a aac -strict experimental -c:v libx264 -q 1 "/media/test/test_effect.mp4"

• Flutter ffmpeg : Video merger not working

  17 September 2021, by Madhusri J

  I have been trying to merge two videofiles using ffmpeg in flutter but a single videofile is merging two times and the sound of video is not working

  


  This is my code

  


   final appDir = await getExternalStorageDirectory();
 String rawDocumentPath = appDir!.path;
 final outputPath = '$rawDocumentPath/videomerge.mp4';

 final FlutterFFmpeg _flutterFFmpeg = new FlutterFFmpeg();

 String commandToExecute = '-y -i ${VideoFiles[0].path} -i ${VideoFiles[1].path} 
  -filter_complex \'[0:v][0:v]concat=n=2:v=1:a=0[out]\' -map \'[out]\' $outputPath';

 _flutterFFmpeg.execute(commandToExecute).then((rc) => print("FFmpeg process exited with 
 rc $rc"));


  


  Any help would be greatly appreciated :)