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• Python threading - multiple ffmpeg percentage

  2 février 2015, par speedyrazor

  I am running 2 ffmpeg jobs simultaneously and trying to read the log files to print out the running percentage completed. This works perfectly when just running one instance, but if I try to start a second then I get this error :

    File "/Users/kev/Desktop/Python/Standards_Converter_Server_V1.0.py", line 2569, in getProgress
  
      self.infile.flush()
  
  AttributeError: 'str' object has no attribute 'flush'

  Here is the crux of my code, not sure why it’s not working :

  if jobID == 1:
  
      self.logFilePath = "//LinkToSomeFile.log"
  
  elif jobID == 2:
  
      self.logFilePath = "//LinkToSomeOtherFile.log"
  
  
  
  threading.Thread(target=self.getProgress, args=(the_running_pane, jobID, slotNumber, self.logFilePath, self.duration, self.countNumber, self.countFile)).start()
  
  
  
  def getProgress(self, the_running_pane, jobID, slotNumber, logFilePath, duration, countNumber, countFile):
  
      self.logFilePath = logFilePath
  
      if os.path.isfile(self.logFilePath):
  
          self.logPath = self.logFilePath
  
          self.infile = codecs.open(self.logPath, encoding='utf8')
  
      else:
  
          raise ValueError("%s isn't a file!" % file_path)
  
      a = str(countNumber)
  
      b = str(countFile)
  
      lastSize = 0
  
      lastLineIndex = 0
  
      while not self.completed:
  
          fileSize = os.path.getsize(self.logPath)
  
          if fileSize > lastSize:
  
              lines2 = self.infile.readlines()
  
              newLines = 0
  
              for line222 in lines2[lastLineIndex:]:
  
                  newLines += 1
  
                  if "No more output streams to write to, finishing." in line222:
  
                      return
  
                  if ("size=" and "time=" and "bitrate=" in line222):
  
                      findMe = re.findall('time=[0-9][0-9]:[0-9][0-9]:[0-9][0-9].[0-9[0-9].', line222)
  
                      findMe = findMe[0]
  
                      runningTime = findMe[5:]
  
                      processRunning = a + " of " + b + "-"
  
                      currentStatus = (processRunning + "%s" % self.percentage(runningTime, self.secondsDuration) + "%" + " - %s" % duration)
  
                      if slotNumber == 1:
  
                          self.params["process1Percentage"] = currentStatus
  
                      elif slotNumber == 2:
  
                          self.params["process2Percentage"] = currentStatus
  
                      lastLineIndex += newLines
  
          lastSize = fileSize
  
          self.infile.flush()
  
          self.infile.seek(0)
  
  
  
  def percentage(self, part, secondsDuration):
  
      self.ftr1 = [3600,60,1]
  
      part = part.replace('.', ':')
  
      secondsPart = sum([a*b for a,b in zip(self.ftr1, map(int,part.split(':')))])
  
      percentage = str(100 * float(secondsPart)/float(secondsDuration))
  
      percentage = percentage.split('.')[0]
  
      if int(percentage) < 10:
  
          percentage = " " + percentage
  
      else:
  
          percentage = " " + percentage
  
      return percentage

  I am trying to get the currentStatus value into self.params["process1Percentage"] and self.params["process2Percentage"]

• FFMPEG eats all the memory

  19 mai 2021, par Abhinandan Chakraborty

  Probably one of the most cliche question but here is the problem : So I have a Ubuntu Server running as an isolated machine only to handle FFMPEG jobs. It has 4 vCPU, 4GB RAM, 80GB storage. I am currently using this script to convert a video into HLS playlist : https://gist.github.com/maitrungduc1410/9c640c61a7871390843af00ae1d8758e This works fine for all video including 4K recorded from iPhone. However, I am trying to add watermark so I changed the line 106 of this script

  


  from :

  


  cmd+=" ${static_params} -vf scale=w=${widthParam}:h=${heightParam}"


  


  to :

  


  cmd+=" ${static_params} -filter_complex [1]colorchannelmixer=aa=0.5,scale=iw*0.1:-1[wm];[0][wm]overlay=W-w-5:H-h-5[out];[out]scale=w=${widthParam}:h=${heightParam}[final] -map [final]"


  


  Now this works flawlessly in videos from Youtube or other sources but as soon as I am trying to use 4K videos from iPhone, the RAM usage grows from 250MB to 3.8GB in less than minute and crashes the entire process. So I looked out for some similar question :

  


  

  1. FFmpeg Concat Filter High Memory Usage

  


  2. https://github.com/jitsi/jibri/issues/269

  


  3. https://superuser.com/questions/1509906/reduce-ffmpeg-memory-usage-when-joining-videos

  


  4. ffmpeg amerge Error while filtering : Cannot allocate memory

  


  


  I understand that FFMPEG requires high amount of memory consumption but I am unsure what's the exact way to process video without holding the stream in the memory but instead release any memory allocation in real-time. Even if we decide to work without watermark, It still hangs around 1.8GB RAM for processing 5 seconds 4K video and this create a risk of what if our user upload rather longer video than it will eventually crash down the server. I have thought about ulimit but this does seem like restricting FFMPEG instead of writing an improved command. Let me know how I can tackle this problem. Thanks

  


• When rTorrent finishes, run FFmpeg and convert audio track in mkv to ac-3 5.1

  11 septembre 2021, par miniHessel

  What is the best approach for this ? I saw the following answer, is that still a valid approach ? If so, how do you execute that when a torrent finishes ? I mostly want to convert dts-hd either 5.1 or 7.1. Sometimes also Atmos.