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• get video resolution from ffpmeg [duplicate]

  22 mai 2018, par MertTheGreat

  This question already has an answer here:

  • TypeError: can't use a string pattern on a bytes-like object in re.findall() 2 answers
  • How can I get the resolution (width and height) for a video file from a linux command line? 9 answers

  I try to get resolution of a video file, and hope this code would help thanks to arionik from GitHub

  from subprocess import Popen, PIPE
  
  def getWH(pathvideofile):
  in_pipe = Popen(["ffmpeg", "-i", "\"%s\"" % (pathvideofile)], stderr=PIPE)
  lines = in_pipe.stderr.readlines()
  for line in lines:
      rx = re.compile('.+Video.+, (\d{2,4})x(\d{2,4}).+')
      m = rx.match(line)
      if m is not None:
          w = int(m.group(1))
          h = int(m.group(2))
  return w, h
  

  But get this error code:

  m = rx.match(line)
  TypeError: cannot use a string pattern on a bytes-like object
  

  What it could be?

  Thank you,

• ffmpeg drawtext filter with zoom in effect

  21 mai 2018, par testaccount wizorbit

  I am using draw text filter to display text on video.i need to add zoom in and zoom out filter on text. is there any command for zoom in and zoom out the text on video.

• How do you use ffmpeg to change video saturation over time ?

  21 mai 2018, par Di Xiao

  ffmpeg -i out.mp4 -vf eq=brightness=0.1:saturation=0.5*t:1:0.5*t -c:a copy output.mp4
  

  Use the parameter t, but it doesn't work.

• Using ffmpeg to transcode/transmux HLS to RTMP for nginx simulcast not working

  21 mai 2018, par Zach

  I want to take an HLS stream and transcode it to RTMP and simulcast it with the nginx RTMP module.

  It's not working, however (I have it placed in the application section of the RTMP module).

  exec ffmpeg -i -re http://.m3u8 -acodec aac -vcodec libx264 -f flv rtmp://localhost/live/test;
  

  When I try to view my RTMP stream in VLC, it is not loading. I have tried several variations of that ffmpeg directive, none have worked. Any advice? If you need to see more of my config file, I can provide that, but this server has been working previously perfectly when sending video over via a Teradek encoder. This new wrinkle is just not working.

  EDIT: Just had a thought. It’d probably help to have the codec information of the incoming HLS stream. Here it is:

  • Video Codec: H264 - MPEG-4 AVC
  • Resolution: 640x360
  • Frame rate: 24
  • Decoded format: Planar 4:2:0 YUV
  • Audio Codec: MPEG AAC Audio (mp4a)
  • Channels: Stereo
  • Sample rate:48000Hz

• Converting an HLS (m3u8) to MP4 [on hold]

  21 mai 2018, par orcaman

  Can anyone advise on how to construct an MP4 file from an HLS stream (the reverse of what you usually want)? Say I have the m3u8 - is there a straightforward way of getting a single MP4 using FFMPEG or some other tool?