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• Getting an error from pyffmpeg when running as a submodule

  3 décembre 2023, par Devin Gardner

  I'm working on building an API using pyffmpeg and pytube to download YouTube videos and convert them to .wav files, synced up with some LED animations. I'm importing pyffmpeg in a submodule, which is then imported by yet another submodule. I'm getting the following error when I run the script (both from my entire package, and in the Python shell directly, and on two different devices with two different OSes) :

  


  This is the error I get from the shell on my MacBook :

  


  Traceback (most recent call last):&#xA;  File "<stdin>", line 1, in <module>&#xA;  File "/path/to/venv/lib/python3.11/site-packages/pyffmpeg/__init__.py", line 163, in convert&#xA;    raise Exception(self.error)&#xA;Exception&#xA;</module></stdin>

  


  And this is the error I get on my Raspberry Pi when I run the full program :

  


    File "/path/to/venv/lib/python3.11/site-packages/pyffmpeg/__init__.py", line 154, in convert
    if 'Output #0' not in stderr:
                          ^^^^^^
UnboundLocalError: cannot access local variable 'stderr' where it is not associated with a value


  


  I've tracked down the relevant code in the __init__.py file of pyffmpeg, but I'm not sure how to fix the problem.

  


          if 'Output #0' not in stderr:
            lines = stderr.splitlines()
            if len(lines) > 0:
                self.error = lines[-1]
            else:
                self.error = ""

            if self.enable_log:
                self.logger.error(self.error)
            raise Exception(self.error)
        else:
            self.error = ''
            if self.enable_log:
                self.logger.info('Conversion Done')
        return out


  


  Anyone have any ideas ?

  


• Python ffmpeg kill a fprobe process

  13 novembre 2017, par emanaltal

  I’m using ffmpeg with python & ubuntu, im going over a loop of url stream files & im sending fprobe command first to read , if works fine i open another subprocess to take snapshot of stream.

  The issue is now the system hang because so many processes. I tried to kill the process using process.kill() and by specifying process PID but still not working

  My code is :

  command = 'ffprobe -v error -show_entries stream=width,height %s'%(url)
  
  process = subprocess.Popen(shlex.split(command),shell=False,stdout=subprocess.PIPE, stderr=subprocess.PIPE)
  
  print process.pid
  
  output = process.communicate()
  
  for i in output:
  
      if i !='':
  
          if '403 Forbidden' in i:
  
          #### update database
  
          elif  '401 Unauthorized' in i: 
  
              #### update database
  
          else:
  
              screenshot = screenshots_path+  str(time.strftime("%Y%m%d%H%M%S",time.localtime()))
  
              play_command = """ffmpeg -i """+m3u_url+""" -vframes 1 -q:v 1  -vf drawtext="fontfile=/usr/share/fonts/truetype/freefont/FreeSerif.ttf:x=(w-text_w)/2:y=(h-text_h-line_h): fontsize=24 :fontcolor=white@1.0 : text= \\'"""+str(m3u_url)+"""'"  %s.jpg -hide_banner"""%(screenshot)
  
              process = subprocess.Popen(shlex.split(play_command),shell=False,stdout=subprocess.PIPE, stderr=subprocess.PIPE)
  
              process.kill()

• Python ffmpeg kill a ffprobe process

  14 novembre 2017, par emanaltal

  I’m using ffmpeg with python & ubuntu, im going over a loop of url stream files & I’m sending ffprobe command first to read , if works fine, I will open another subprocess to take snapshot of stream.

  The issue is now the system hang because so many processes. I tried to kill the process using process.kill() and by specifying process PID but still not working

  My code is :

  command = 'ffprobe -v error -show_entries stream=width,height %s'%(url)
  
  process = subprocess.Popen(shlex.split(command),shell=False,stdout=subprocess.PIPE, stderr=subprocess.PIPE)
  
  print process.pid
  
  output = process.communicate()
  
  for i in output:
  
      if i !='':
  
          if '403 Forbidden' in i:
  
          #### update database
  
          elif  '401 Unauthorized' in i: 
  
              #### update database
  
          else:
  
              screenshot = screenshots_path+  str(time.strftime("%Y%m%d%H%M%S",time.localtime()))
  
              play_command = """ffmpeg -i """+m3u_url+""" -vframes 1 -q:v 1  -vf drawtext="fontfile=/usr/share/fonts/truetype/freefont/FreeSerif.ttf:x=(w-text_w)/2:y=(h-text_h-line_h): fontsize=24 :fontcolor=white@1.0 : text= \\'"""+str(m3u_url)+"""'"  %s.jpg -hide_banner"""%(screenshot)
  
              process = subprocess.Popen(shlex.split(play_command),shell=False,stdout=subprocess.PIPE, stderr=subprocess.PIPE)
  
              process.kill()