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• Kodi : playback several video files from the internet as single movie with single timeline

  30 mai 2018, par HarryFox

  I’m writing an add-on for Kodi in Python, for a site with movie collection, which can be able to playback online video from the site. But problem is that many of them splitted apart on pieces of different length. And its not mpeg dash nor m3u playlists, its just individual pieces of single movie or an episode.

  My target is able to play those splitted videos as single movie with single timeline and playback will no require download all pieces of a movie. It’s important because many of Movies\episodes provides with subtitle file, that why single timeline is important. Also general idea for plugin which I’m writing is comfort to use, so online playback is very important too.

  I did some research but it almost no result. On official Kodi forum advise to create Input Stream add-on like Input Stream Adaptive, but it was written on c++ and it’s unattainable for me (for now at least). There is no tools for python to create such kind of add-ons.

  Another idea is to create middle server which on fly will somehow (with ffmpeg) combine those pieces, but it seems that the process will too resource-intensive especially for TV-boxes.
  In this case also raise many question about which way is better, and i have no enough experience and knowledge to solve the problems by myself even with google.

  So i need an advice how can i solve the problem, just to know right direction.
  Thank you for your time.
  Sorry for my English.

• Python : mp3 to wave.open(f,'r') through ffmpeg pipe

  7 avril 2015, par user2754098

  I’m trying to decode mp3 to wav using ffmpeg :

  import alsaaudio
  
  import wave
  
  from subprocess import Popen, PIPE
  
  
  
  with open('filename.mp3', 'rb') as infile:
  
      p=Popen(['ffmpeg', '-i', '-', '-f', 'wav', '-'], stdin=infile, stdout=PIPE)
  
      ...

  Next i want redirect data from p.stdout.read() to wave.open(file, r) to use readframes(n) and other methods. But i cannot because ’file’ in wave.open(file,’r’) can be only name of file or an open file pointer.

      ...
  
      file = wave.open(p.stdout.read(),'r')
  
      card='default'
  
      device=alsaaudio.PCM(card=card)
  
      device.setchannels(file.getnchannels())
  
      device.setrate(file.getframerate())
  
      device.setformat(alsaaudio.PCM_FORMAT_S16_LE)
  
      device.setsetperiodsize(320)
  
      data = file.readframes(320)
  
      while data:
  
          device.write(data)
  
          data = file.readframes(320)

  I got :

  TypeError: file() argument 1 must be encoded string without NULL bytes, not str

  So is it possible to handle data from p.stdout.read() by wave.open() ?
  Making temporary .wav file isn’t solution.

  Sorry for my english.
  Thanks.

• ffmpeg how to convert pgs subtitles to srt

  20 mai 2015, par 8ofspades

  I’m having an issue with extracting subtitles from ffmpeg 2.6.2. I have an mkv file with 6 subtitle streams, and I would like to generate srt files for all of them. My ffprobe output for the streams is below.

      Stream #0:0(eng): Video: h264 (High), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 29.97 fps, 29.97 tbr, 1k tbn, 59.94 tbc (default)
  
  Stream #0:1(ita): Audio: ac3, 48000 Hz, stereo, fltp, 448 kb/s (default)
  
  Stream #0:2(ita): Audio: dts (DTS), 48000 Hz, 5.0(side), fltp, 1536 kb/s
  
  Metadata:
  
    title           : Italian
  
  Stream #0:3(rus): Subtitle: subrip (default)
  
  Metadata:
  
    title           : Russian
  
  Stream #0:4(ita): Subtitle: hdmv_pgs_subtitle
  
  Metadata:
  
    title           : Italian
  
  Stream #0:5(eng): Subtitle: hdmv_pgs_subtitle
  
  Metadata:
  
    title           : English
  
  Stream #0:6(fre): Subtitle: hdmv_pgs_subtitle
  
  Metadata:
  
    title           : French
  
  Stream #0:7(ger): Subtitle: hdmv_pgs_subtitle
  
  Metadata:
  
    title           : German
  
  Stream #0:8(spa): Subtitle: hdmv_pgs_subtitle
  
  Metadata:
  
    title           : Spanish

  The russian (subrip) subtitles work fine with

  ffmpeg -i input.mkv -c:s:0 copy sub_ru.srt

  however when I try and select and of the other (pgs) subtitle streams, it ignores the stream I selected and outputs the russian (stream 0:3) subtitles.

  I’m not sure if this an issue with my ffmpeg command or the fact that the other streams are pgs.

  Thanks