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Video bitrate for push/view links

How to control video bitrates for basic push/view links

The default settings

The default video bitrate for simple push/view links is 2500-kbps.
​https://vdo.ninja/?push=streamid https://vdo.ninja/?view=streamid By default, both outgoing and incoming video bitrates are set at 2500-kbps. This default setting and parameters are different if using Rooms and explained in detail here.
There are five parameters we will take a look at:
  1. 1.
    ​&outboundvideobitrate (&ovb) -> push side
  2. 2.
    ​&maxvideobitrate (&mvb) -> push side
  3. 3.
    ​&limittotalbitrate (&ltb) -> push side
  4. 4.
    ​&videobitrate (&vb) -> view side
  5. 5.
    ​&totalscenebitrate (&tsb) -> view side

On the source side (&push)

​&outboundvideobitrate (&ovb) Sets the target and maximum outgoing video bitrate on the source side.
​https://vdo.ninja/?push=streamid&ovb=4000 https://vdo.ninja/?view=streamid The push link sets the outgoing and incoming video bitrate to 4000-kbps. The view link doesn't need an additional parameter as its bitrate is set at 4000-kbps because the push link is using &ovb.
​&maxvideobitrate (&mvb) &mvb is similar to &ovb but it sets the target and maximum bitrate per stream out.
​https://vdo.ninja/?push=streamid&mvb=1000 https://vdo.ninja/?view=streamid Every view link has a video bitrate of 1000-kbps.
​&limittotalbitrate (&ltb) Limits the total outbound video bitrate to a defined value.
​https://vdo.ninja/?push=streamid&ltb=5000 https://vdo.ninja/?view=streamid The incoming video bitrate will still default to around 2500-kbps but permits the viewer to increase it on their end with &ltb telling the push link to not get higher than 5000-kbps total outgoing bitrate.

On the viewer side (&view)

​&videobitrate (&vb) The view link is setting the target and maximum video bitrate per incoming stream.
​https://vdo.ninja/?push=streamid https://vdo.ninja/?view=streamid&vb=2000 The view link is setting the bitrate per incoming stream (in this case 2000-kbps). So if you have a view link with three incoming video feeds: &view=stream1,stream2,stream3 - every source is pushing 2000-kbps as &vb=2000 and the view link has a combined bitrate of 6000-kbps.
​&totalscenebitrate (&tsb) This is similar to &vb but it sets the target and maximum bitrate for all incoming streams combined.
​https://vdo.ninja/?push=streamid https://vdo.ninja/?view=streamid&tsb=3000 So if you have a view link with three incoming video feeds: &view=stream1,stream2,stream3 - every source is pushing 1000-kbps as &tsb=3000.

Mixing the parameters

As doing some testing there were these results:
All the three push parameters are always limiting the maximum. So if you set one of the three parameters to a value, the outgoing video bitrate will never be higher than you set it.
&tsb also always limits the bitrate on the viewer side, whereas &vb is overwritten by &ovb and &mvb.
  • &ovb is overwriting &vb
  • &mvb is overwriting &vb
  • &tsb is stronger than &ovb
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Last modified 5mo ago