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• Video getting ahead of audio during recording HLS

  20 juillet 2015, par user2981810

  I have a problem where I’m using the Kickflip.io (see code base which is in github) base and building off of it, but after about 10+ seconds the video is getting ahead of the audio. I was able to verify that the audio is playing at the correct rate, so its definitely the video.

  I’ve tried adjusting the sample frame rate for the video down to 10 fps, and this does nothing. Based on all the other audio out of sync with video which is out there for FFMpeg, I’m starting to wonder if there’s something in the FFMpeg cocoa pod.

  My guess is that the issue is in :
  https://github.com/Kickflip/kickflip-ios-sdk/blob/master/Kickflip/Outputs/Muxers/HLS/KFHLSWriter.m

• It is possible using ffmpeg to burn in srt and speed up without audio adjustment in one go ?

  25 novembre 2022, par MANICX100

  I have the following functions in my config file (fish shell, but the command would be easily adaptable) to one burn in provided srt subtitles above the file and another to speed up the file video and audio without adjusting the pitch.

  


  function ffmpeg-burnin-srt
    ffmpeg -i $argv[1] -vf subtitles=$argv[2] -preset ultrafast $($now)-output.mkv
end

function speedupvid
      ffmpeg -i $argv[1] -filter_complex "[0:v]setpts=1/$argv[2]*PTS[v];[0:a]rubberband=tempo=$argv[2][a]" -map "[v]" -map "[a]" -preset ultrafast $($now)-output.mkv
end


  


  I would like to and have tried combining the two but that is not allowed as it is a mixture of filters when complex is being used.

  


  I believe I could run the two functions as one, but that would involve encoding twice.

  


  Is it possible to do both steps in one pass and if not what would be the best solution ?

  


• OSError : [errno2] no such file or directory and OSError : [Errno 12] Cannot allocate memory

  30 octobre 2018, par elena

  I am trying to convert video with Apache Kafka and FFmpeg. I have run my program on my system, but it fails when it runs on the server. I run code I got this error :

  Traceback (most recent call last):
  
    File "/home/fu/kafka/kafkaVideo/ffmpeg-python-master/ffmpeg/send.py", line 30, in <module>
  
      subprocess.call([sys.executable, start])
  
    File "/usr/lib/python2.7/subprocess.py", line 523, in call
  
      return Popen(*popenargs, **kwargs).wait()
  
    File "/usr/lib/python2.7/subprocess.py", line 711, in __init__
  
      errread, errwrite)
  
    File "/usr/lib/python2.7/subprocess.py", line 1235, in _execute_child
  
      self.pid = os.fork()
  
  OSError: [Errno 12] Cannot allocate memory
  
  frame send
  
  frame send
  
  frame send
  
  frame send
  
  ...
  
  raceback (most recent call last):
  
    File "/home/fu/kafka/kafkaVideo/ffmpeg-python-master/ffmpeg/send.py", line 30, in <module>
  
      subprocess.call([sys.executable, start])
  
    File "/usr/lib/python2.7/subprocess.py", line 523, in call
  
      return Popen(*popenargs, **kwargs).wait()
  
    File "/usr/lib/python2.7/subprocess.py", line 711, in __init__
  
      errread, errwrite)
  
    File "/usr/lib/python2.7/subprocess.py", line 1235, in _execute_child
  
      self.pid = os.fork()
  
  OSError: [Errno 12] Cannot allocate memory
  
  frame send
  
  frame send
  
  ...
  
  Traceback (most recent call last):
  
    File "send.py", line 107, in <module>
  
      publish_video(video_path)
  
    File "send.py", line 48, in publish_video
  
      subprocess.call([sys.executable, start])
  
    File "/usr/lib/python2.7/subprocess.py", line 523, in call
  
      return Popen(*popenargs, **kwargs).wait()
  
    File "/usr/lib/python2.7/subprocess.py", line 1392, in wait
  
      pid, sts = _eintr_retry_call(os.waitpid, self.pid, 0)
  
    File "/usr/lib/python2.7/subprocess.py", line 476, in _eintr_retry_call
  
      return func(*args)``
  
  OSError: [Errno 2] No such or directory
  
  </module></module></module>

  but The third part of the error is different in different debug