[Galene] Re: Future plans: Pion v4 and TWCC

[Tim Panton <tim@pi.pe>]

I was talking to a friend about starlink and bwe. He claims the variation is predictable.
If true it might be fun to do an estimator that -knew- about starlink and scheduled a full frame immediately after the handover glitch. (For example)

T.

Sent from my iPad

> On 2 Jan 2025, at 18:57, Dave Taht <dave.taht@gmail.com> wrote:
> 
> On Wed, Jan 1, 2025 at 5:16 PM Sean DuBois <sean@pion.ly> wrote:
>> 
>> It does [0]
>> 
>> It can use improvements though. I have been distracted by broadcasting/robotics recently, but I would
>> love to come back to this.
> 
> yay!
> 
>> 
>> [0] https://github.com/pion/interceptor/blob/master/pkg/gcc/delay_based_bwe.go#L50
> 
> sigh. this reacts so slowly.... rc := newRateCalculator(500 * time.Millisecond)
> 
> Starlink would be interesting.
>> 
>> 
>> On Jan 1, 2025, at 5:27 PM, Dave Taht <dave.taht@gmail.com> wrote:
>> 
>> On Wed, Jan 1, 2025 at 12:45 PM Juliusz Chroboczek <jch@irif.fr> wrote:
>> 
>> 
>> Hi,
>> 
>> The reason I've released 0.96 is that it looks like a rock solid version,
>> and I'm planning to break things.  More specifically, I've just finished
>> doing a straightforward port to Pion WebRTC v4, and I'm planning to make
>> the following changes to Galene's protocol:
>> 
>> - use a separate RTX track for retransmissions;
>> - use TWCC instead of REMB for GCC congestion control.
>> 
>> The RTX track will allow browsers to do more precise accounting of packet
>> loss, which should improve behaviour under packet loss.  Replacing our
>> home-grown implementation of REMB with Pion's implementation of TWCC will
>> hopefully improve behaviour on congested links (it will no longer be
>> necessary to manually switch to "Send: low" when on a slow link), but more
>> experimentation is needed.
>> 
>> This work is going on in the "pion-v4" branch, which I'll merge into master
>> when I'm satisfied it doesn't break anything.
>> 
>> 
>> Did delay and not just loss make it into pion?
>> 
>> -- Juliusz
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>> 
>> 
>> 
>> --
>> Dave Täht CSO, LibreQos
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>> 
> 
> 
> -- 
> Dave Täht CSO, LibreQos
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