Question / Help Bit Rate Tanks Intermittently

[Veriitas]

Been having issues for nearly 6 months now - gone through a number of ethernet cables, two different PCs, 3 separate routers/modems, one ISP but recently changed from consumer internet to business internet and still no fix.

ISP: Comcast Business - 1gb down/35mb up

During my streams my bitrate will be constant, I've tried 4000-8000 as my bitrate between being affiliate and partnered over the last few months. It'll be stable for hours at a time and then randomly it'll tank from 6k to 1k to 0, the after a few seconds back up to 6k, then it'll continue this pattern every few minutes over and over again. This obviously causes the stream to lag and sometimes go down completely. There have been times where I've been hosted for thousands of viewers only to have the stream die shortly after for long enough where their auto-host takes over and all the viewers get transferred over to another channel. I've tried everything I could possibly think of over the last few months and dealing with Comcast is literal hell. Nothing is wrong on their end, they've come maybe a dozen different times and checked everything - no issues. I've tried everything I can think of and did my best to peruse the forum/stickies. This is starting to become extremely expensive for me and is hurting the growth of my stream big time.

Been using glasswire to see if there's anything I can gather, but so far I just see huge dips in the upload from OBS that correspond with the outages but no idea why...

Log: https://pastebin.com/qRwvnRnf

 

[Fenrir]

I understand that these kinds of issues can be frustrating, but there is very little we can do to help. Connection issues are always between you and the service you're streaming to. Everything we can suggest is in our connection issues guide (and read the detailed technical explanation from Jim himself here). Especially make sure you're using the latest drivers for your network card, as the ones that ship with Windows can sometimes be very old and unstable.

 

[Veriitas]

What do the logs tell you - am I losing connection to the internet, to Twitch, or what?

Regarding questions in the network post:

1. I've tried auto server selection, the best server for me based on the tool, and the next best two servers as well. Same issue.
2. Lower bitrate - tried, didn't fix random drops to 0.
3. Hardwired Ethernet
4. No issues with other services AFAIK.
5. I've checked the firewall settings but admittedly am not an expert on this so not 100% sure.
6. Speed test - 920Mbps down / 40Mbps up whenever I check it.
7. Latest drivers AFAIK.
8. Gone through 3 different sets of hardware.

 

[Fenrir]

Most of the network process takes place outside of OBS. We request that the OS send data, and then the OS is responsible for sending it to where it needs to go. Since this isn't happening inside OBS, we have no visibility in to where the issue actually is. I don't really have any further suggestions, if you've already tried replacing all your hardware (both PC and networking) than the issue is likely on Comcast's side, and yes, they are a nightmare to deal with. Make sure you are being as clear as you can with them on explaining what the issue is (that you're streaming, to twitch). I had similar issues a few years ago with them, and it took nearly two months of constant callbacks before they finally diagnosed and corrected the issue on their end after insisting it was not them.