[x265] Dynamic rate control

[Ralf Globisch]

Mario, thanks for the reply.

> So you are using a client-to-server feedback control, trying to control  
> the video bitrate based on the download speed, in a real-time encode  
> scenario?

Yes, exactly.
> The usual approach I knew so far was providing several video streams with  
> different setups and switching between them (like in MPEG DASH, as used by  
> YouTube for HD video features).

I am familiar with the bitstream switching approach, but am looking at rate control 
in e.g. video conferencing/WebRTC scenarios where this is not really an option. 
Perhaps the scalable extension is a better fit for such use cases. 
Are there any plans for implementing SHVC in x265?

> I don't know the interna, but I could imagine that reconfiguring the  
> bitrate control will have a quite slow effect, probably only from the next  
> GOP on, when it comes to effect at all. I wonder if you may have to force  
> a kind of encoder reset after reconfiguring... Just a thought.

Ok, thanks, I was hoping there might be another way as resetting an encoder 
when adjusting to network congestion will likely have an adverse effect.



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