Micro stutters - What's the cause? Logfile attached.

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PaulHeyhoe1987

New Member

Hi all,

I'm new to the forum but have done a fair few streams in the last few years. I have a small issue which is rather frustrating when broadcasting to an audience.

Stream is here:

www.twitch.tv

Twitch

Twitch is the world's leading video platform and community for gamers.
www.twitch.tv www.twitch.tv

I'm only streaming 720p @60fps, in order to try and achieve a smooth, fluid stream which most people view on mobile devices.

I have a reasonable single PC setup but I do use a fair amount of resources as I have the following running:
  • OBS
    Assetto Corsa Competizione (running at 1440p native)
  • Discord
  • Chrome with maybe 2 or three tabs on each (Twitch channel, simracing.gp - for stats and driver info, and a general browser tab)
  • Pitlink (a timing server program which connects to the ACC game and pulls data which is then uploaded and displayed via an independant service to viewers through a browser)
  • PitWall - a browser based client which displays the race/timing data to me on one of mymonitors.
  • Broadcast tool - Connects to ACC server and allows switching of cameras, drivers and also displays timig data.
I have 4 monitors setup, 1 x Dell Ultrsharp 34" 1440p UW & 3 x Samsung 27" G7 1440p.

Game is running on single 27" 1440p monitor in native res.

OBS Canvas set to 1440p.

I downscale to 720p using the "Video" tab and use Lanczos scaling method.

The game is set to run at a fixed 60fps. Gsync disabled.

The problem you will see with the stream is the micro stutters. This seems to happen regardless of in game settings and does not show up on the OBS preview so I feel like the problem is the actual encoding/streaming process.

I'm running an RTX 3090 and a R7 5800X at stock speeds.

I realise there is a bit of junk in the log file as there are some sources which need to be removed from old streams, I would have removed these but I didn't realise things like that were logged (it's my first time viewing a log file).

Anyway, if anyone can see what is causing these micro stutters it would help greatly!

Thanks,

Paul.
 
koala

koala

Active Member
According to your log, everything is fine. No issues with OBS. Game running with fixed 60 fps and disabled gsync is fine as well. Did you also enable vsync? Only with vsync enabled, the frame pacing is constant and synced to the output to avoid micro stutter.
Your video is unavailable.
 
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PaulHeyhoe1987

New Member
Hi, thanks for the reply.

I hadn't enabled vsync as I assumed locking the game to 60 would achive the desired sync between the game output and the stream. Ah damn, I forgot Twitch would delete the stream. I'll give it a go with enabling vsync and see if that makes a difference.

Thanks, Paul.
 
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