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• Revision 5eed74e1d3 : Refactor get_tx_type and get_scan This makes it easier to add new transform typ

  19 août 2015, par hui su

  Changed Paths :
   Modify /vp10/common/blockd.h

  
   Modify /vp10/common/scan.h

  
   Modify /vp10/decoder/decodeframe.c

  
   Modify /vp10/encoder/encodemb.c

  
   Modify /vp10/encoder/pickmode.c

  
   Modify /vp10/encoder/rdopt.c

  
   Modify /vp10/encoder/tokenize.c

  
  
  Refactor get_tx_type and get_scan

  This makes it easier to add new transform types and scan orders
  to VP10 in the future.

  Change-Id : I94874ddc9b19928d7820d57e94e2af04adf51efe

• How to convert orginal video into multiple quality like youtube by using ffmpeg ? [closed]

  21 avril 2021, par rahulchanchardbabaji

  I am creating a streaming app like youtube while I am creating it I am facing many challenges related to different quality video converting.

  


  


  1. Should I convert orginal video file into multiple video file (like 240p, 480p and 720p) and storage them ? Or there is anyway where I can create a single video file can the same.

     


  


  2. Which video format should I use MP4, HLS or DASH for fast streaming, support for every devices, take minimum space and support subtitles.

     


  


  


• Python, Youtube-video-downloader-merger Can i inproove this script run faster ?

  31 janvier 2020, par robotiaga

  I created script which one downloading video and sound from Youtube, and after that merging sound and video with ffmpeg, i wondering is another way to make same result but in faster way ? Because this script takes about 7 min depends on Video quality and duration. My code bellow :

  from pytube import YouTube
  
  import sys
  
  import ffmpeg
  
  import os
  
  
  
  
  
  class Downloader(YouTube):
  
  
  
      def __init__(self, link):
  
          self.link = YouTube(link)
  
          self.hq = []
  
          self.best_video = []
  
          self.best_sound = []
  
  
  
  
  
      def stream_objects(self):
  
          q = [self.hq.append(x) for x in self.link.streams.all()]
  
          self.best_video.append(str(self.hq[1]).split()[1].split('\"')[1])
  
          self.best_sound.append(str(self.hq[-1]).split()[1].split('\"')[1])
  
          return self.best_video, self.best_sound
  
  
  
      def downloady(self):
  
          vid = self.link.streams.get_by_itag(str(self.best_video).strip("['']"))
  
          audio = self.link.streams.get_by_itag(str(self.best_sound).strip("['']"))
  
          self.vid_title = (f"{vid.title}"+".mp4")
  
  
  
          vid.download(filename='video')
  
          audio.download(filename='audio')
  
          print('Downloaded, Now Starting Merge \n\n\n\n\n')
  
          print(f'{self.vid_title}'+'\n')
  
  
  
      def merge(self):
  
          ffmpeg.output(ffmpeg.input('video.mp4'), ffmpeg.input('audio.webm'), self.vid_title).run()
  
          os.remove('video.mp4')
  
          os.remove('audio.webm')
  
  
  
  
  
  
  
  if __name__=='__main__':
  
      a = Downloader(link = sys.argv[1])
  
      a.stream_objects()
  
      a.downloady()
  
      a.merge()

  OKE UPDATE :
  Now code looks like that..Second problem is slow downloading mp4 files from YouTube server, i have 10Gb/s internet. Good connection with YT servers, but why so poor downloading ? ? ? :)

  from pytube import YouTube
  
  import sys
  
  import ffmpeg
  
  import os 
  
  import subprocess
  
  
  
  class Downloader(YouTube):
  
  
  
      def __init__(self, link):
  
          self.link = YouTube(link)
  
          self.hq = []
  
  
  
  
  
      def stream_objects(self):
  
          self.best = self.link.streams.filter(file_extension='mp4')
  
          q = [self.hq.append(x) for x in self.best.all()]
  
          self.best_vid_itag = str(self.best.all()[1]).split()[1].split('\"')[1]
  
          self.best_audio_itag = str(self.best.all()[-1]).split()[1].split('\"')[1]
  
  
  
      def downloader(self):
  
          vid = self.link.streams.get_by_itag(self.best_vid_itag)
  
          aud = self.link.streams.get_by_itag(self.best_audio_itag)
  
          print('Donwloading Video file...\n')
  
          vid.download(filename='video')
  
          print('Video file downloaded... Now Trying download Audio file..\n')
  
          aud.download(filename='audio')
  
          print('Audio file downloaded... Now Trying to merge audio and video files...\n')
  
  
  
      def merger(self):
  
          lin = str(self.link.title).rstrip()
  
          lin2 = (lin+'.mp4')
  
          subprocess.run(f'ffmpeg -i video.mp4 -i audio.mp4 -c copy "{lin2}"', shell=True)
  
          os.remove('video.mp4')
  
          os.remove('audio.mp4')
  
          print('Done....\n')
  
  
  
  if __name__=='__main__':
  
      a = Downloader(link = sys.argv[1])
  
      a.stream_objects()
  
      a.downloader()
  
      a.merger()