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• Failing to upload an mp4 to youtube

  28 juillet 2018, par Joseph Berry

  I’m trying to convert an WMA file into mp4 in order to upload the file to youtube.
  VN550672.wma.zip
  Although the conversion is successful (see below) i’m not able to upload the file to youtube. I’m getting the following error

  The video has failed to process. Please make sure you are uploading a supported file type.

  VN550672.mp4.zip

  Any suggestions ?

  System configuration :
  Python version : 3.6.3
  Pydub version : 0.22.1
  ffmpeg or avlib ? : ffmpeg
  ffmpeg/avlib version : 2.8.4

• avcodec/ttmlenc : Deduplicate ttml_default_namespacing string

  29 juillet 2022, par Andreas Rheinhardt

  avcodec/ttmlenc : Deduplicate ttml_default_namespacing string
  String literals are allowed to be deduplicated (and toolchains
  
  are already capable of doing so), yet the same is not allowed
  
  for named arrays (even when they contain strings). Therefore
  
  use a const char *const pointing to an unnamed string literal
  
  for ttml_default_namespacing.
  Reviewed-by : Jan Ekström <jeebjp@gmail.com>
  
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
  

  • [DH] libavcodec/ttmlenc.h

• Python complex string interpolation on shell command

  2 mai 2018, par Rex Low

  I have a shell command that I would like to execute, with a python script. It’s a combination of ffmpeg, grep, gawk and several other ffmpeg options.

  The command

  ffmpeg -i http://0.0.0.0:8080/stream/video.mjpeg -vcodec copy -map 0 -f segment -segment_time 2 -loglevel 40 -segment_format mp4 capture-%05d.mp4 2>&1 | grep --line-buffered -Eo "segment:.+ended" | gawk -F "'" '{print $2; system("")}'

  If you run this command on terminal, it should return a string

  capture-00001.mp4

  Now, my objective is to run this with subprocess on Python3. Since the command is rather complex with mixed single and double quotes, it needs to be treated correctly otherwise it will complain EOL while scanning string literal, invalid syntax, etc, etc.

  I have tried several string formating methods but none work. Below is one of the ways I’ve tried.

  Script

  import os
  
  import datetime
  
  import subprocess
  
  
  
  first = "segment:.+ended"
  
  second = "'"
  
  third = '{print $2; system("")}'
  
  
  
  if __name__ == "__main__":
  
      fScript = "ffmpeg -i http://0.0.0.0:8080/stream/video.mjpeg -vcodec copy -map 0 -f segment -segment_time 2 -loglevel 40 -segment_format mp4 capture-%05d.mp4 2>&1 | grep --line-buffered -Eo {} | gawk -F {} {}".format(first, second, third)
  
      try:
  
          result = subprocess.check_output(fScript, shell=True).decode('utf-8')
  
          print(result)
  
      except subprocess.CalledProcessError as e:
  
          print(e.output)