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Video bitrates 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 There will be a outgoing video bitrate of 2500-kbps on the source side and 2500-kbps incoming video bitrate on the viewer side.
There are five parameters we will take a look at:
  1. 2.
    &maxvideobitrate (&mvb) -> push side
  2. 3.
  3. 4.
    &videobitrate (&vb) -> view side
  4. 5.

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 video bitrate to 4000-kbps. The view link sees the video with a video bitrate of 4000-kbps.
&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 video bitrate will be around 2500-kbps (default value), because &ltb only tells the push link to not get higher than 5000-kbps.

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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Outline
The default settings
On the source side (&push)
The push link sets the target and maximum outgoing video bitrate
The push link sets the video bitrate per stream out
The push link limits the video bitrate to a maximum defined value
On the viewer side (&view)
The view link sets the video bitrate per stream in
The view link sets the total video bitrate for all incoming streams combined
Mixing the parameters