Recherche avancée

Sur d’autres sites (6081)

• Python - ffmpeg-like media seeking with requests

  8 janvier 2017, par Will

  Using ffmpeg, times in HTTP media resources, such as videos, can be seeked to very quickly with a command like ffmpeg -ss 00:01:00 -i https://example.com/video.mp4, presumably by downloading the video headers to look for the right byte offset. This means that it is very fast to run operations on a section of video, even if it is hours in.

  What I want to be able to do is to do the same thing but piping into ffmpeg with the requests module with something like (in partial pseudo-code) :

  stream = requests.get(url, stream=True)
  
  start_byte = get_byte_offset(stream, time=60)
  
  stream.seek_to(start_byte)
  
  
  
  process = subprocess.Popen(["ffmpeg", "-i" "pipe:" "out.mp4"], stdin=subprocess.PIPE)
  
  
  
  for chunk in stream.iter_content(chunk_size=64 * 2 ** 10):
  
      process.stdin.write(chunk)
  
  process.stdin.close()

  This would allow me to implement extra checks into the stream that I would normally need to parse ffmpeg for, such as if the stream returns a bad status code such as 404 or 403.

  How might I be able to implement this using the requests, and presumably other, modules ? I suppose the first part is using a tool to parse the video headers.

• FFMPEG and HTTPS

  14 juin 2012, par Joel

  ffmpeg lists http as a protocol when I ask : ffmpeg -protocols

  Does this also mean support for a https url ? Do I need to encode this url somehow for the command line. I get "No such file or directory", but with http urls (at least some) it does work.

  A url (created for a Amazon S3 bucket) similar to this one does not seem to work :
  https://mycompany-video-test.s3.amazonaws.com/client/btr/video/xyz0011-x403-snap-n-go-ex/1/video/baby-laugh-ripping-paper.mp4?AWSAccessKeyId=AVIAZL9J6SIRPAA&Expires=1323709667&Signature=pTvS9F2do2t8%3D

  I suspect the format of the url is problematic, I've also tried enclosing in quotes... Yes, this URL does not currently work as it has expired, but even while its valid, its a problem.

  In short :
  1) Should https work ?
  2) Do I need to format the url somehow ?

• ffmpeg not working with filenames that have whitespace

  1er avril 2017, par cmw

  I’m using FFMPEG to measure the duration of videos stored in an Amazon S3 Bucket.

  I’ve read the FFMPEG docs, and they explicitly state that all whitespace and special characters need to be escaped, in order for FFMPEG to handle them properly :

  See docs 2.1 and 2.1.1 : https://ffmpeg.org/ffmpeg-utils.html

  However, when dealing with files whose filenames contain whitespace, ffmpeg fails to render a result.

  I’ve tried the following, with no success

  ffmpeg -i "http://s3.mybucketname.com/videos/my\ video\ file.mov" 2>&1 | grep Duration | awk '{print $2}' | tr -d
  
  ffmpeg -i "http://s3.mybucketname.com/videos/my video file.mov" 2>&1 | grep Duration | awk '{print $2}' | tr -d
  
  ffmpeg -i "http://s3.mybucketname.com/videos/my'\' video'\' file.mov" 2>&1 | grep Duration | awk '{print $2}' | tr -d
  
  ffmpeg -i "http://s3.mybucketname.com/videos/my\ video\ file.mov" 2>&1 | grep Duration | awk '{print $2}' | tr -d

  However, if I strip out the whitespace in the filename – all is well, and the duration of the video is returned.

  Any help is appreciated !