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• Is there a possibility to automatically render .json data into a video file ? [closed]

  3 septembre 2020, par chipsys

  I have a .json document from a dash cam which includes date, time, velocity, longitude and latitude for each frame.

  


  My goal is just to write the text on the lower third of each frame. Future projects might animate a speedometer and implement open street map.

  


  I have looked at ffmpeg but haven’t found a way to implement it yet.

  


  If you have the slightest idea on how to implement this please leave a response or guide me in the right direction.

  


  Thank you.

  


• Bento4 MP4Dash fails with audio ?

  27 août 2017, par CMOS

  I am running Bento4 Mp4Dash to convert my fragmented video files into MPEG-DASH streaming videos. However I seem to get this error

  ERROR : unsupported input file, more than one "traf" box in fragment

  but only if I have audio enabled. I have found that if I run -an in FFMPEG (to ignore the audio tracks) my MP4Dash command runs just fine, any ideas as to why this would happen ?

• Subprocess call invalid argument or option not found

  14 septembre 2018, par NickB

  I’m trying to call ffmpeg command using subprocess.call() on linux, but I’m unable to get the arguments right. Before hand, I used os.system and it worked, but this method is not recommended.

  Using arguments with a dash such as "-i" gets me this error

  Unrecognized option 'i "rtsp://192.168.0.253:554/user=XXX&password=XXX&channel=0&stream=0.sdp?real_stream"'.
  
  Error splitting the argument list: Option not found

  Using arguments without dash like "i" gets me this error

  [NULL @ 0x7680a8b0] Unable to find a suitable output format for 'i rtsp://192.168.0.253:554/user=admin&password=&channel=0&stream=0.sdp?real_stream'
  
  i rtsp://192.168.0.253:554/user=XXX&password=XXX&channel=0&stream=0.sdp?real_stream: Invalid argument

  Here’s the code

  class IPCamera(Camera):
  
  """
  
      IP Camera implementation
  
  """
  
  def __init__(self,
  
               path='\"rtsp://192.168.0.253:554/'
  
                    'user=XXX&password=XXX&channel=0&stream=0.sdp?real_stream\"'):
  
  
  
      """
  
          Constructor
  
      """
  
      self.path = path
  
  
  
  def __ffmpeg(self, nb_frames=1, filename='capture%003.jpg'):
  
      """
  
      """
  
  
  
      ffm_input = "-i " + self.path
  
      ffm_rate = "-r 5"
  
      ffm_nb_frames = "-vframes " + str(nb_frames)
  
      ffm_filename = filename
  
  
  
      if platform.system() == 'Linux':
  
          ffm_path = 'ffmpeg'
  
          ffm_format = '-f v4l2'
  
  
  
      else:
  
          ffm_path = 'C:/Program Files/iSpy/ffmpeg.exe'
  
          ffm_format = '-f image2'
  
  
  
      command = [ffm_path, ffm_input, ffm_rate, ffm_format, ffm_nb_frames, ffm_filename]
  
      subprocess.call(command)
  
  
  
      print(command)

  BTW, I’m running this command on a MT7688.

  Thanks