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• i have this code. It is supposed to classify the segment files with the ratings in sys.argv[5].But it keeps having error

  3 août 2014, par Darkace435

  I have the following code tha uses FFmpeg . It has 5 argv and it takes in filename,video,segment size, start time, end time, ratings. thats supposed to let me classify segments many times with my ratings "PG G M18..." but there’s this error,

  "File "C:\c.py",line 92, in <module> os.rename<filename filename="filename" the="the" system="system" cannot="cannot" find="find" the="the" file="file"></filename>code></module>

  Ive tried to edit many times but this error still persists. Anyone have any idea what could this error mean and anyway to solve it ?

  import sys
  
  import subprocess
  
  import os
  
  
  
  #change hh:mm:ss to seconds:
  
  def getSeconds(sec):
  
      l = sec.split(':')
  
      return int(l[0])* 3600 + int(l[1])* 60 + float(l[2])
  
  
  
  def get_total_time(filename):
  
  
  
      proc = subprocess.Popen(["ffmpeg", "-i", filename], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
  
      lines = proc.communicate()[1]
  
      target = [line for line in lines.split('\n') if 'Duration:' in line][0]
  
      time = target.split('Duration: ')[-1].split(',', 1)[0]
  
      return time
  
  
  
  
  
  #check command line arguments
  
  if len(sys.argv) < 5:
  
      print "Error: not enough arguments"
  
      sys.exit()
  
  
  
  #save filename to file_name
  
  file_name = sys.argv[1]
  
  if not file_name.endswith('mpg'):
  
      print 'Error! File extension not supported'
  
      sys.exit()
  
  # save a size of chunk in chunk
  
  segsize = int(sys.argv[2])
  
  chunk = (segsize * 1024)
  
  
  
  # get time of starting censorship in seconds
  
  start_censorship = getSeconds(sys.argv[3])
  
  
  
  # get time of ending censorship in seconds
  
  end_censorship   = getSeconds(sys.argv[4])
  
  
  
  classification = sys.argv[5]
  
  if classification not in ['P','PG','G','NC16','M18','R21']:
  
      print "Error: invalid classification"
  
      sys.exit()
  
  
  
  #initialize variable for extension 
  
  file_ext = ''
  
  
  
  
  
  # if extension exists then save it into file_ext
  
  if '.' in file_name:
  
      # split file_name on two parts from right
  
      file_ext = sys.argv[1].split('.')[-1]
  
  
  
  
  
  # file_name without extension    
  
  filename = '.'.join(file_name.split('.')[:-1])
  
  
  
  # total_time of file in seconds
  
  total_time = getSeconds(get_total_time(file_name))
  
  
  
  print total_time
  
  
  
  
  
  
  
  #open file    
  
  in_file = open(file_name,'rb')
  
  
  
  
  
  #read first chunks
  
  s = in_file.read(chunk)
  
  
  
  in_file.seek(0, 2)
  
  file_size = in_file.tell()
  
  chunks = (file_size / chunk) + 1
  
  
  
  chunk_time = total_time/ file_size * chunk
  
  
  
  #close input file    
  
  in_file.close()
  
  
  
  #loop for each chunk
  
  for x in range(0, chunks):
  
      # starting time of current chunk
  
      t1 = chunk_time*x
  
      # ending time of current chunk    
  
      t2 = chunk_time*(x+1)
  
  
  
      if t2 < start_censorship or t1 > end_censorship:
  
          pass
  
      else:
  
          if os.path.exists(filename + str(x) + 'x'):
  
              os.rename(filename + str(x) + 'x', filename + str(x))
  
          os.rename(filename + str(x), filename + str(x) + classification)
  
  
  
      #read next bytes

• mpegts : Return proper error code on invalid input data

  9 août 2014, par Nidhi Makhijani

  mpegts : Return proper error code on invalid input data
  Signed-off-by : Diego Biurrun <diego@biurrun.de>
  

  • [DBH] libavformat/mpegtsenc.c

• avformat_write_header return error code when trying to write PCMU encoded frame into avi/mov file

  9 août 2015, par Kaidul Islam

  I am trying to write PCMU G.711 enocded data into avi multimedia container using below program which yields Error occurred when opening output file: Operation not permitted and when using mov container, it yields Error occurred when opening output file: Invalid argument. I set AV_CODEC_ID_PCM_U16LE as audio codec of output format and AV_SAMPLE_FMT_S16 as sample format.

  What’s the problem here ? Thanks in advance !