[BUG] Bandwidth goes up slowly on every new sesssion

[WaltzBinaire]

Describe the bug
When starting the demo you will see the image quality ramping up slowly everytime you create a new connection.

It seems almost animated as if a control value was not initialized and interpolates up over time.

To Reproduce
Only on 2.1.0
Start demo - local or on server.
Bad quality on startup slowly progressing to full quality over 15-30 seconds

Expected behavior
A quick recovery of the image quality matching the actual bandwidth

Screenshots

Environment (please complete the following information):

• Windows 64
• Chrome
• Unity Version 2019.4.9f1
• 2.1.0-preview.4

Additional context
Bug was introduced in 2.1.0 - we couldnt find this particular behavior before.

[WaltzBinaire]

hey @karasusan - let us know if there is any way you need helpt testing

[karasusan]

@WaltzBinaire

To fix this issue, I erased the operation of using customized SDP.
Please check it.

[WaltzBinaire]

hey @karasusan ,

thank you! Unfortunatly we cant verify it gettign better. Let us know if we can help testing.

[karasusan]

This issue is caused by the customized SDP.
Could you check your Unity project and web application whether they customize SDPs?
Unity-Technologies/UnityRenderStreaming#331

[WaltzBinaire]

Hey yes please ignore my previous post. I just checked it and it works! The bandwidth rises quickly.
BUT it brings back the previous issue #164 . It seems when you solved issue #164 you introduced the slow bandwith in the beginning that wasnt there before - now that the slow bandwidth in the beginning is solved - we can see the #164 again.

[karasusan]

@WaltzBinaire
I am glad to help you.
Can I reopen the issue #164? I guess it might be better to create a new one.

I expect the input system is the cause of it, but there is no proof of that yet.
Do you have any other clues?

[WaltzBinaire]

Hey @karasusan - yes i think we should reopen the issue. The challenge here is that multiple issues seem to be connected to the same procedure - and that makes it important to tackle the moment they start to appear. From our side:

1. there were two issues : dropping bitrate/artefacts and input lack
2. around 2.1.0 : both problems solved - but slow ramp on bandwidth in the beginning
3. you reverted changes : bitrate/artefacts look ok - slow ramp bandwidth solved - but input lack comes back

I believe all those issues spin around the lines that control sdp - and i think this is the most important issue of the repo - since control and quality determine the overall quality.

However im als not able to tackle the issue - really sorry!

[WaltzBinaire]

@karasusan Are you able to recreate the input lack? #164

[karasusan]

@WaltzBinaire
OK, I reopened the issue #164, we will be able to discuss in it instead of here.
I close this issue, thanks.