Question / Help Bitrate randomly dropped to ~500 kbps, and won't go back up

[Forstride]

I have no idea what's going on. My bitrate randomly dropped to ~500 kbps in the middle of a stream, and even after closing OBS, restarting the stream, changing servers, etc., nothing helped.

I stream at 2000 kbps normally, and my connection is perfectly fine (This speedtest was done while the stream was dropped to 500 kbps):

I'm using OBS Studio 0.13.2. Here's a log from when it happened: https://gist.github.com/anonymous/0c27f9c99a7baa2a03d6

This is around where it happened in the stream: http://www.twitch.tv/forstride/v/51093615?t=01h28m36s

The audio starts stuttering, and then just cuts out completely.

 

[Harold]

Twitchtest results screenshot please.

 

[Forstride]

Twitchtest results screenshot please.

Which one? The executable here, or this site: https://r-1.ch/analyzer/

They're both by the same guy, but IDK if they function the same.

EDIT: Results using the site: https://r-1.ch/analyzer/results/forstride.92f906

 

[Harold]

the executable, not the site. They do NOT function the same by any stretch of the imagination.

 

[Forstride]

Results using the executable:

I normally stream to the Ashburn, VA server

 

[Harold]

The MediaFoundation encoders (NVENC, QSV, VCE) do NOT support CBR.
You can't use them for streaming.

 

[Forstride]

Ah, okay. Thanks for the help.