Question / Help Frames dropping for Twitch viewers

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nebbishd

New Member
Hi,

Have been streaming Starcraft 2 to twitch over the past couple of months using Open OBS. Over the time my audience has consistantly complained that the FPS drops dramatically during periods of high-action. Everything is silky-smooth on my end while I'm playing. I've gone through this guide:

http://help.twitch.tv/customer/portal/a ... r-software

And tweaked some settings, but it's only helped marginally. I've got a decent PC and a 50/25 FIOS internet connection, so I don't think it's a hardware issue.

My latest log file is attached...thanks in advance for any help!

Nick
 

Attachments

  • 2013-08-19-2010-28.log
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FerretBomb

FerretBomb

Active Member
Go to http://testmy.net/upload and run a 6MB test. You are dropping a LOT of frames, which means that there is a network problem between you and your selected Twitch server. Most likely you do not actually have 2000kbps available, plus overhead for the network overhead for SC2 multiplayer.

Ignore speedtest.net, it doesn't return usable values for livestreaming (doesn't test for constant throughput). Testmy does.

Also, go here and run ShaperProbe to test if your ISP is shaping your upstream traffic: http://www.cc.gatech.edu/~partha/diffpr ... probe.html
 
N

nebbishd

New Member
Thanks FerretBomb. DiffProbe says there is no shaping going on, and I have an estimated upstream capacity of 16190 Kbps. Testmy.net (pasted below) implies I've got less but should still be enough for a 3000 kbps max bitrate, no matter how you cut it.

So, unless I'm misunderstanding these results, it shouldn't be an upload capacity problem.

:::.. Upload Speed Test Result Details ..:::
Upload Connection Speed:: 6321 Kbps or 6.3 Mbps
Upload Speed Test Size:: 6 MB or 6144 kB or 6291456 bytes
Upload Binary File Transfer Speed:: 790 kB/s
Tested At:: http://TestMy.net Version 13
Validation:: http://testmy.net/db/L8poIuF
More Stats:: http://testmy.net/compID/1593467921048
Test Time:: 2013-08-19 23:38:03 Local Time
Location:: Newtonville, MA US >> Destination:: Dallas, TX US
1MB Upload in 1.3 Seconds - 1GB Upload in ~22 Minutes - 113X faster than 56K
This test of exactly 6144 kB took 7.963 seconds to complete
Running at 100% of hosts average (Verizon FiOS http://testmy.net/hoststats/verizon_fios)
User Agent:: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:23.0) Gecko/20100101 Firefox/23.0 [!]
 
N

nebbishd

New Member
I recently switched it to NYC (I'm in Boston), which did seem to help a little, but ultimately didn't affect the core issue. I'll try Ashburn secondary and see if it's any better.
 
N

nebbishd

New Member
Seemed to work a lot better for one or two streaming sessions, but it's terrible again. Back to the drawing board...I'm guessing it's a Verizon/upload bandwidth issue, but it's pulling teeth to get them to agree that there is a problem (at least one on their end).
 
N

nebbishd

New Member
So, after much much messing around, I found that turning OFF "Use CFR" in the advanced settings reduces my lost frames from 50% ish percent to 0%. I reduced the resolution and bitrate a little too, but since raising them somewhat I still haven't had any problems, so the "use CFR" is the real culprit.
 
K

Kharay

Member
Not in the latest test build. Have a look at the test builds section on the forum. Should fix the CFR issue that existed.
 
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