Recherche avancée

Sur d’autres sites (11355)

• Show progress bar of a ffmpeg video convertion

  13 juin 2022, par stackexchange.com-upvm25mz

  I'm trying to print a progress bar while executing ffmpeg but I'm having trouble getting the total number of frames and the current frame being processed. The error I get is AttributeError: 'NoneType' object has no attribute 'groups'. I've copied the function from this program and for some reason it works there but not here, even though I haven't changed that part.

  


  main.py

  


  pattern_duration = re.compile(
    'duration[ \t\r]?:[ \t\r]?(.+?),[ \t\r]?start', re.IGNORECASE)
pattern_progress = re.compile('time=(.+?)[ \t\r]?bitrate', re.IGNORECASE)

def execute_ffmpeg(self, manager, cmd):
    proc = expect.spawn(cmd, encoding='utf-8')
    self.update_progress_bar(proc, manager)
    self.raise_ffmpeg_error(proc)

def update_progress_bar(self, proc, manager):
    total = self.get_total_frames(proc)
    cont = 0
    pbar = self.initialize_progress_bar(manager)
    try:
        proc.expect(pattern_duration)
        while True:
            progress = self.get_current_frame(proc)
            percent = progress / total * 100
            pbar.update(percent - cont)
            cont = percent
    except expect.EOF:
        pass
    finally:
        if pbar is not None:
            pbar.close()

def raise_ffmpeg_error(self, proc):
    proc.expect(expect.EOF)
    res = proc.before
    res += proc.read()
    exitstatus = proc.wait()
    if exitstatus:
        raise ffmpeg.Error('ffmpeg', '', res)

def initialize_progress_bar(self, manager):
    pbar = None
    pbar = manager.counter(
        total=100,
        desc=self.path.rsplit(os.path.sep, 1)[-1],
        unit='%',
        bar_format=BAR_FMT,
        counter_format=COUNTER_FMT,
        leave=False
    )
    return pbar

def get_total_frames(self, proc):
    return sum(map(lambda x: float(
        x[1])*60**x[0], enumerate(reversed(proc.match.groups()[0].strip().split(':')))))

def get_current_frame(self, proc):
    proc.expect(pattern_progress)
    return sum(map(lambda x: float(
                x[1])*60**x[0], enumerate(reversed(proc.match.groups()[0].strip().split(':')))))


  


• Modify video with FFMPEG before uploading to S3

  12 juillet 2017, par user774615

  When a user uploads a video, I want to remove its audio. So in my Laravel code, I have something like this :

  // The video from the HTML form
  
  $video = $request->file('video');
  
  
  
  // Strip the audio
  
  exec('ffmpeg -y -i ' . <path to="to" file="file"> . ' -an -c copy ' . <new file="file" path="path">);
  
  </new></path>

  The problem is, I want to upload the final video (without audio) to Amazon’s S3 without saving any part of the video on my local server.

  Is there a way to use $video as the input for the ffmpeg command and then output the result directly to S3 ? How ?

• Using subprocess on Popen option

  26 septembre 2015, par yumyumyum

  I use python 2.7 and ffmpeg on Mac OS 10.10.
  When use some command from python, coded like below

  p = subprocess.Popen(cmd.strip().split(" "))

  This goes well all the time, but not in ffmpeg filter_complex case.
  Below code can run on the terminal with directly input.

  ffmpeg -i input1.mp4 -i input2.mp4 -filter_complex " nullsrc=size=1920x1440 [base]; [0:v] setpts=PTS-STARTPTS, scale=1920x1440 [frame0];[1:v] setpts=PTS-STARTPTS, scale=640x480 [frame1]; [base] [frame0] overlay=shortest=1:x=1920:y=1440 [tmp1]; [tmp1] [frame1] overlay=shortest=1:x=640:y=480  output.mp4

  But cannot run with python Popen script like below.

  cmd = "ffmpeg -i input1.mp4 -i input2.mp4 -filter_complex " nullsrc=size=1920x1440 [base]; [0:v] setpts=PTS-STARTPTS, scale=1920x1440 [frame0];[1:v] setpts=PTS-STARTPTS, scale=640x480 [frame1]; [base] [frame0] overlay=shortest=1:x=1920:y=1440 [tmp1]; [tmp1] [frame1] overlay=shortest=1:x=640:y=480  output.mp4"
  
  p = subprocess.Popen(cmd.strip().split(" "))

  This has problem at split(" ") works unexpected subdivision.
  So I prepare the split command directly like

  split_cmd = [ffmpeg_exe,'-i','input1.mp4','-i','input2.mp4','-filter_complex','\" nullsrc=size=1920x1440 [base]; [0:v] setpts=PTS-STARTPTS, scale=1920x1440 [frame0];[1:v] setpts=PTS-STARTPTS, scale=640x480 [frame1]; [base] [frame0] overlay=shortest=1:x=1920:y=1440 [tmp1]; [tmp1] [frame1] overlay=shortest=1:x=640:y=480\"','output.mp4'];
  
  p = subprocess.Popen(split_cmd)

  Even in this case, system return

  [AVFilterGraph @ 0x7fb1c9f000c0] No such filter: '" nullsrc' 
  
  Error configuring filters.

  this could be system confused the -filter_complex option as ffmpeg option.
  Anyone can help this, please.