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• How to generate valid live DASH for YouTube ?

  24 septembre 2019, par Matt Hensley

  I am attempting to implement YouTube live video ingestion via DASH as documented at :
  https://developers.google.com/youtube/v3/live/guides/encoding-with-dash

  To start, I am exercising the YouTube API manually and running ffmpeg to verify required video parameters before implementing in my app.

  Created a new livestream with liveStreams.insert and these values for the cdn field :

  "cdn": {
  
      "frameRate": "variable",
  
      "ingestionType": "dash",
  
      "resolution": "variable"
  
  }

  Created a broadcast via liveBroadcasts.insert, then used liveBroadcasts.bind to bind the stream to the broadcast.

  Then I grabbed the ingestionInfo from the stream and ran this ffmpeg command, copying in the ingestionAddress with the streamName :

  ffmpeg -stream_loop -1 -re -i mov_bbb.mp4 \
  
      -loglevel warning \
  
      -r 30 \
  
      -g 60 \
  
      -keyint_min 60 \
  
      -force_key_frames "expr:eq(mod(n,60),0)" \
  
      -quality realtime \
  
      -map v:0 \
  
      -c:v libx264 \
  
      -b:v:0 800k \
  
      -map a:0 \
  
      -c:a aac \
  
      -b:a 128k \
  
      -strict -2 \
  
      -f dash \
  
      -streaming 1 \
  
      -seg_duration 2 \
  
      -use_timeline 0 \
  
      -use_template 1 \
  
      -window_size 5 \
  
      -extra_window_size 10 \
  
      -index_correction 1 \
  
      -adaptation_sets "id=0,streams=v id=1,streams=a" \
  
      -dash_segment_type mp4 \
  
      -method PUT \
  
      -http_persistent 1 \
  
      -init_seg_name "dash_upload?cid=${streamName}&copy=0&file=init$RepresentationID$.mp4" \
  
      -media_seg_name "dash_upload?cid=${streamName}&copy=0&file=media$RepresentationID$$Number$.mp4" \
  
      'https://a.upload.youtube.com/dash_upload?cid=${streamName}&copy=0&file=dash.mpd'

  It appears all the playlist updates and video segments upload fine to YouTube - ffmpeg does not report any errors. However the liveStream status always shows noData, and the YouTube Live Control Room doesn’t show the stream as receiving data.

  The DASH output, when written to files play backs fine in this test player. The playlist output doesn’t match exactly the samples, but does have the required tags per the "MPD Contents" section in the documentation.

  Are my ffmpeg arguments incorrect, or does YouTube have additional playlist format requirements that are not documented ?

• Youtube live stream with dynamic content

  6 octobre 2019, par Arturek

  I’m trying to create a live stream with changing data in real-time on youtube.

  Let’s say I want to show the current Bitcoin price in real-time. For instance, using python and sending requests to some public APIs, I can very easily get current prices of Bitcoin. But I have no idea how to create such a live stream, which will be automatically updated with fresh data.

  I know that I can use ffmpeg to stream on youtube, but how would I change the content of my stream ?

  # To make sure you know what I mean, I created a basic sample.
  
  
  
  import requests
  
  import json
  
  import time
  
  
  
  createYtLiveStream()
  
  
  
  while(True):
  
    response = requests.get('https://api.coindesk.com/v1/bpi/currentprice.json').json()
  
    price = response['bpi']['USD']['rate']
  
  
  
    updateYtLiveStream(price)
  
  
  
    time.sleep(20)

  I want to do it on Ubuntu. Can you tell me how can I do it, please ?
  Thanks.

• Streaming 4K video file to YouTube on a Raspberry Pi 4 using FFMPEG

  25 mai 2021, par martijn

  I'm trying to stream a 4K video file to YouTube on a raspberry pi4 using FFMPEG (version : Linux raspberrypi 5.10.17-v7l+ #1414 SMP Fri Apr 30 13:20:47 BST 2021 armv7l GNU/Linux, 8gb).
I know you cannot do that with older Pi-versions.
I didn't find the proper ffmpeg commands yet, so I cannot test it right now. But before I give it a try, is it basically possible to stream 4K in this way with this version of the Pi ?