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• TypeError : 'function' object is not subscriptable Python with ffmpeg

  25 novembre 2019, par S1mple

  clips = []
  
  
  
  def clipFinder(CurrentDir, fileType):
  
      clips.clear()
  
      for r,d,f in os.walk(CurrentDir):
  
          for file in f:
  
              if fileType in file:
  
                  clips.append(r+file)
  
      random.shuffle(clips)
  
  
  
  def removeVods(r):
  
      for f in clips:
  
          if 'vod' in clips:
  
              os.remove(r+f)
  
  
  
  def clipString():
  
      string = 'intermediate'
  
      clipList = []
  
      clipNum = 1
  
      for f in clips:
  
          clipList.append(string+str(clipNum)+'.ts'+'|')
  
          clipNum+=1
  
      string1 = ''.join(clipList)
  
      string2 = string1[0:len(string1)-1]
  
      return string2
  
  
  
  def concatFiles():
  
      clipFinder('***', '.mp4')
  
      removeVods('***')
  
      i = 0
  
      intermediates = []
  
      for f in clips:
  
          subprocess.call(['***', '-i', clips[i], '-c', 'copy', '-bsf:v', 'h264_mp4toannexb', '-f', 'mpegts', 'intermediate'+ str(i+1) +'.ts'])
  
          i += 1 
  
      clipsLength = len(clips)
  
      subprocess.call['***', '-i', '"concat:' + clipString() + '"', '-c', 'copy', '-bsf:a 
  
      aac_adtstoasc', 'output.mp4']

  I am trying to make a clip concatenator, but the last subprocess call won’t run and gives me the error shown in the question.

  Problematic code :

  subprocess.call(['***', '-i', '"concat:' + clipString() + '"', '-c', 'copy', '-bsf:a aac_adtstoasc', 'output.mp4'])

  all places with * were paths such as :
  /davidscomputer/bin/ffmpeg/

• Merge video clips together with FFMPEG's concat, where some clips have no audio

  23 février 2023, par Patrick Vellia

  I have a grouping of files in a videos.txt file :

  


  file 'title.mp4'
file 'welcome.mp4'
file 'introductions_slide.mp4'
file 'introductions.mp4'
file 'presentation_part_1_slide.mp4'
file 'presentation_part_1.mp4'
file 'presentation_part_2_slide.mp4'
file 'presentation_part_2a.mp4'
file 'presentation_part_2b.mp4'
file 'questions_and_answers_slide.mp4'
file 'questions_and_answers.mp4'


  


  Some of these files (title.mp4, introductions_slide.mp4, presentation_part_1_slide.mp4, presentation_part_2_slide.mp4 and questions_and_answers_slide.mp4) are generated from PowerPoint's export to MP4 files and do not contain an audio stream.

  


  I tried to follow this thread to add an audio stream to title.mp4, but when I then run the concat command, it's full of errors in the input stream. The resulting file is a silent one with no audio stream.

  


  I know it's possible to merge a mixed silent-noise audio video files together because I was able ot achieve it in QuickTime. However, I am trying to figure out how to do it using ffmpeg.

  


  Here's my current concat command :

  


  ffmpeg -f concat -i videos.txt -c:v copy -c:a copy output.mp4


  


  How can I run concat so that it will include the audio where audio is present, but maintain silence where it isn't ?

  


• FFmpeg video from image plus audio length issue

  1er juin, par blackbrayn

  I'm having issues regarding the output video length when using the following code which seems to work for everybody else.

  


  On a input mp3 of 04:56 I get a 05:09, the last part is only the image, no sound, for a longer mp3 input file I get more silent video at the end.

  


  I'm using the "-shortest" option just before the output file as an argument , as suggested in other threads around stackoverflow/superuser.

  


     ffmpeg -loop 1 -i image.jpg -i audio.mp3 -c:v libx264 -tune stillimage -c:a aac -strict experimental -b:a 192k -shortest out.mp4


  


  I already changed the input file type - wav , and the image - png, jpg, same silent "overhead" at the end of the video.