Recherche avancée

Sur d’autres sites (12243)

• Split large amount of wav files to small parts

  3 juillet 2017, par Tadeáš Pešek

  I have large amount of wav files (over 50 000) and I need to split every wav file to 10 second long parts. It’s nearly impossible to do it one by one, so my question is : is there any way to do it in ffmpeg or for example in sox ? I’m an amateur, so I need exact instructions. Please, if you can, write it like you would for a dummy :)... (I’m a Windows 7 user)

  Here is my try with sox

  Thank you !

• How can I split an mp4 video with ffmpeg every time the volume is zero ?

  14 mars 2019, par Juan Pablo Fernandez

  I need to split a video into many smaller videos.
  I have tried PySceneDetect and its 2 scene detection methods don’t fit my need.

  The idea is to trigger a scene cut/break every time the volume is very low, every time audio level is less than a given parameter. I think overall RMS dB volume level is what I mean.

  The purpose is to split an mp4 video into many short videos, each smaller video with short dialog phrases.

  So far I have a command to get the overall RMS audio volume level.

  ffprobe -f lavfi -i amovie=01x01TheStrongestMan.mp4,astats=metadata=1:reset=1 -show_entries frame=pkt_pts_time:frame_tags=lavfi.astats.Overall.RMS_level,lavfi.astats.1.RMS_level,lavfi.astats.2.RMS_level -of csv=p=0

  How can I get only the minimum values for RMS level and its corresponding frame or time ?

  And then how can I use ffmpeg to split the video in many videos on every frame that corresponds to a minimum RMS ?

  Thanks.

• Ffmpeg- Split the video into 30 seconds chunks in android [duplicate]

  23 novembre 2019, par Corgi Mogi

  This question is an exact duplicate of :

  • Ffmpeg- Split video into 30 seconds parts in android

  I am trying to split a video file into 30 second blocks.
  I do not need to specify where the 30 seconds start or finish.
  EXAMPLE- A single 45 second video will be split into VID1_part1 (30 seconds), VID1_part2 (15 seconds).

  Right now I am using the Ffmpeg command where I need to specify the starting and ending point.

  String[] complexCommand = {"-ss", "" + startMs / 1000, "-y", "-i", yourRealPath, "-t", "" + (endMs - startMs) / 1000,"-vcodec", "mpeg4", "-b:v", "2097152", "-b:a", "48000", "-ac", "2", "-ar", "22050", filePath};

  I also tried to add a for loop in order to repeat the process

   int start, end;
  
          for (int i = 0; i <= duration; i = i + 30) {
  
              start = i;
  
              end = start + 30;
  
  
  
              String[] complexCommand = {"-ss", "" + start, "-y", "-i", yourRealPath, "-t", "" + end,"-vcodec", "mpeg4", "-b:v", "2097152", "-b:a", "48000", "-ac", "2", "-ar", "22050", filePath};
  
              execFFmpegBinary(complexCommand);
  
          }

  But didn’t workout

  This works fine.
  But I want the command through I can split a single video into 30 second chunks.
  And should I use a single command for this purpose or a series of commands ?
  Help is much appreciated