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• How to get the information of bit-rate from YouTube videos ?

  21 février 2017, par Ashutosh Singla

  I was using YouTube videos for my test and I was wondering how can I get the information of bit-rate of the played video ?

  I used 2 methods to know the information about the bit-rate but didn’t get any information.

  1. Right-click on a video and choose "Stats for nerds".
  
  2. ffmpeg -i input_video -f ffmetadata metadata.txt

  I don’t know if by doing the right click on the video and then properties, then details would give me the correct way of showing the bit-rate.

  Any suggestions ?

• Cannot stream properly on YouTube using ffmpeg with Python

  1er mars 2018, par Francesco

  I have a few problems related to sending ffmpeg stream to YouTube.
  1. If I comment out "time.sleep(sleep_time)" the stream goes 3x fast(basing on what ?) ;
  2. If I uncomment the ’-r’ args the stream lags ;
  3. If I don’t add the background music the stream doesn’t start on YouTube, the problem persists if I uncomment the ’-an’ args.
  4. When the background music ends the stream stops working on YouTube.

  frame = cv2.imread('STATIC_IMAGE.jpg')
  
  fps = 25
  
  sleepTime = 1 / fps
  
  
  
  height, width, channels = frame.shape
  
  
  
  command = [
  
      'ffmpeg',
  
  
  
      #OpenCV image.
  
      #'-re',
  
      #'-threads', '0',
  
      '-f', 'rawvideo', #image2pipe
  
      '-vcodec','rawvideo',
  
      '-s', str(width) + 'x' + str(height),
  
      '-pixel_format', 'bgr24',
  
      #'-r', str(fps),
  
      #'-an',
  
      '-i', '-',
  
  
  
      #Background music
  
      #'-stream_loop', '-1',
  
      #'-re',
  
      #'-r', str(fps),
  
      '-i', 'music.mp3',
  
  
  
      #Output (actual stream)
  
      #'-r', str(fps),
  
      #'-crf', '25',
  
      #'-g', '39',
  
      #'-g', '2',
  
      #'-ac', '2',
  
      #'-c:a', 'aac',
  
      #'-b:a', '128k',
  
      #'-ar', '44100',
  
      #'-an',
  
      #'-b:v', '300k',
  
      #'-c:v', 'libx264',
  
      #'-bufsize', '600k',
  
      #'-maxrate', '300k',
  
      #'-qmin', '32',
  
      #'-qmax', '64',
  
      #'-vcodec', 'libx264',
  
      #'-pixel_format', 'yuv420p',
  
      '-vcodec', 'h264',
  
      '-pixel_format', 'h264',
  
      '-f', 'flv',
  
      'rtmp://a.rtmp.youtube.com/live2/STREAM_KEY'
  
  ]
  
  
  
  import subprocess as sp
  
  proc = sp.Popen(command, stdin=sp.PIPE, shell=False)
  
  
  
  while True:
  
      proc.stdin.write(frame.tostring())
  
  
  
      time.sleep(sleepTime)

  Any idea of why these problems happen ?
  May the "while True" be the problem ?

• FFMPEG : 2x2 Grid Cameras stream to Youtube

  8 avril 2021, par Martin

  So this is my "working" ffmpeg command :

  


  ffmpeg -rtsp_transport tcp -i "input1" -rtsp_transport tcp -i "input2" -rtsp_transport tcp -i "input3" -rtsp_transport tcp -i "input4" -filter_complex "[0:v] setpts=PTS-STARTPTS, scale=480x270 [a0];[1:v] setpts=PTS-STARTPTS, scale=480x270 [a1];[2:v] setpts=PTS-STARTPTS, scale=480x270 [a2];[3:v] setpts=PTS-STARTPTS, scale=480x270 [a3];[a0][a1][a2][a3]xstack=inputs=4:layout=0_0|0_h0|w0_0|w0_h0[out]" -map "[out]" -map 3:a -video_size 1920x1080 -tune zerolatency -profile:v baseline -level 3.0 -b:v 5000k -vcodec libx264 -preset medium -q:v 3 -crf 15 -r 15 -c:a aac -ac 2 -f flv rtmp://a.rtmp.youtube.com/live2/...

  


  The problem that i have is that the Youtube recognize this stream as only "360p" and i think that the quality of each stream is way worst than these cameras really are.

  


  Is there something that i'm doing wrong or it should "work" like that because of scalling it to 2x2 grid ?