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• PySceneDetect FFmpeg Not Available

  14 août 2023, par Dmitriy Pushkarev

  I already installed FFmpeg and this is available in terminal I can convert video and etc, but it's completely not available in PySceneDetect.

  


  pip installed FFmpeg-python and FFmpeg library and FFmpeg itself in system.

  


  PySceneDetect returns :

  


  ffmpeg could not be found on the system. Please install ffmpeg to enable video output support.


  


  I think trouble with path, but can't put path in PySceneDetect. I can use path to binary FFmpeg, only in ffmpeg-python library, like this and it's working

  


  This code working fine :

  


  Here i using only FFmpeg-python library

  


  stream = ffmpeg.input('vi0.mp4')
stream = ffmpeg.filter(stream, 'fps', fps=10, round='up')
stream = ffmpeg.output(stream, 'vi1.mp4')
ffmpeg.run(stream,cmd='./ffmpeg')


  


  But can't it to get work with PySceneDetect

  


  print(scenedetect.video_splitter.is_ffmpeg_available())


  


  return False

  


  split_video_ffmpeg(video_path, scene_list, show_progress=False)


  


  returns "ffmpeg could not be found on the system. Please install ffmpeg to enable video output support."

  


• Revision 29746 : Gestion de la file d’attente

  8 juillet 2009, par kent1@… — Log

  Gestion de la file d’attente

• Sending 2 streams to FFmpeg from nodejs

  18 août 2019, par Sylens

  I am trying to send 2 ReadableStreams to FFmpeg from nodejs. I have tried using fluent-ffmpeg library to do this, but it only supports sending one stream for processing. Check here

  My problem is :
  I have 2 incoming mono audio streams, I want to send them to ffmpeg to create a stereo stream, which I will then send to google’s speech to text service, to generate a transcription.

  I am successfully receiving both the mono streams to the nodejs server.
  How to utilize FFmpeg to merge them in realtime is still unclear, I could spawn a FFmpeg child process, but I’m not sure how to give 2 ReadableStreams as inputs and get the output as another stream ? FFmpeg supports multiple input streams.

  I can merge the 2 mono streams if they are in two separate files with this code.

  const { spawn } = childProcess;
  
  const ffmpeg = spawn('ffmpeg', [
  
    '-i', this.phoneAudioFile,
  
    '-i', this.micAudioFile,
  
    '-filter_complex', '[0:a][1:a]amerge=inputs=2[a]',
  
    '-map', '[a]',
  
    this.outputLosslessFile,
  
  ]);

  How can I acheive the same using 2 streams instead of 2 files ?

  EDIT

  • The incoming streams both have PCM audio data.
  • This entire process runs on a linux Ubuntu server.
  • The final output must be a wav file.