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• variable length of segments in HLS

  12 août 2019, par shubham vashisht

  I am using FFmpeg to create a hls streaming manifest from a audio file.
  So far i can break the audio file into several segments based on the duration. Let’s say 10. But the requirement is to break audio file in such way that first few segments are of lesser size say 4 seconds and following segments of 10 seconds long.
  I am calling ffmpeg from a python script like this

      result = subprocess.Popen(['ffmpeg -y -i {}  -acodec copy -f segment -segment_time {} -segment_list {}.m3u8 {}%03d.ts'.format(pathToDownloadedMediaFile, 10, mediaFileName,mediaFileName)],stdout=subprocess.PIPE,stderr=subprocess.STDOUT, shell=True)

  is there any way to create first few segments of different duration than the rest ?

• Getting "Unrecognized option '1'" when using "-map_metadata -1" to erase metadata with ffmpeg [closed]

  20 novembre 2024, par Nautilus Era

  Edit :
  
As said in the header, this question is not about programing and I will ask it on the appropriate Stack.
  
My confusion came from the fact that I am using Python to make my calls to the shell, however, it has nothing to do with the problem I am trying to solve.
  
Thank you for your time and sorry for the bother.

  


  ---

  


  I was trying to erase metadata from a file using ffmpeg using the
following command :

  


  ffmpeg –i $file_path –map_metadata -1 –c copy $stripped_video_output


  


  Where $file_path and $stripped_video_output are variables containing
their respective path.

  


  ffmpeg gave the answer :

  


  Unrecognized option '1'. 
Error splitting the argument list: Option not found


  


  I am using Debian 12.

  


  I tried with both the repository's version as well as a compiled version
of ffmpeg and I tried on two different computers.

  


  If anyone can help with that, I would appreciate it.

  


  Thank you in advance and have a good one.

  


• How can I run FFPROBE in a Python script without triggering the Windows Command window ?

  1er mars, par fnord12

  I am using ffmeg/ffprobe to get video durations (in an addon for Kodi). The code :

  


  result = subprocess.run(["ffprobe", "-hide_banner", "-v", "quiet", "-show_entries",
                                 "format=duration", "-of",
                                 "default=noprint_wrappers=1:nokey=1", filename], stdout=subprocess.PIPE, stderr=subprocess.STDOUT)


  


  The above code and the file importing that code both have a .pyw extension (after first trying regular .py).

  


  This works fine but in Windows 11 it causes the black Windows Command window to briefly flash for each video, despite the -hide_banner flag and loglevel being set to quiet. In Linux Mint it runs without any such window popping up.

  


  Found the answer : subprocess.run just needed a final shell=True as the last argument.