Recherche avancée

Sur d’autres sites (15200)

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

  11 avril 2018, par 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

• Flutter ffmpeg : Video merger not working

  17 septembre 2021, par 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 :)

  


• Got two working ffmpeg commands, help me transform them

  7 mars 2019, par lukistar

  here are two different commands.

  ffmpeg -i input.mp3 -i second.mp3 -filter_complex "[0:a]atrim=end=10,asetpts=N/SR/TB[begin];[0:a]atrim=start=10,asetpts=N/SR/TB[end];[begin][1:a][end]concat=n=3:v=0:a=1[a]" -map "[a]" output

  This command inserts second.mp3 into input.mp3. It seems to always keep the parameters of input.mp3. It inserts it in exact 10 seconds of input.mp3.

  Here is the second command :

  ffmpeg -i input.mp3 -i second.mp3 -filter_complex "[1:a]adelay=10000|10000[1a];[0:a][1a]amix=duration:first" output

  This command is closer to my final goal. It plays input.mp3 and in exact 10 seconds it plays along second.mp3 without stopping input.mp3’s sound.

  My final goal is to create final.mp3.

  Its duration must always equal input.mp3 duration. It must keep the samplerate, the count of channels, etc of input.mp3

  When playing final.mp3, it must play the whole input.mp3.
  But each 10-15 seconds, it must play second.mp3 without stopping input.mp3.
  It could be said that I must use "Second command" but in a loop.
  It would be great if there is one-line command for that in ffmpeg.
  I am working with flac, mp3 and wav and both of the commands, I got, work great for what they are doing.

  For example :

  input.mp3 could be 40 seconds long.

  second.mp3 could be 2 seconds long.

  When I play final.mp3 it will be 40 seconds long, but each 10-15 seconds(on random) it will play second.mp3 at the same time as input.mp3.

  Sadly I have no experience with ffmpeg, both of the commands I got are answers to questions here in stackoverflow. Hope somebody can help me. Thank you !