Question / Help Switched to OBS Studio, now stream is choppy

K

Kadi

New Member
Hi!

I've been using OBS classic for some time now and recently switched to OBS studio to implement something on my stream that I was unable to with OBS classic (a short video animation). I am using the same settings as I did with OBS classic but I've noticed that my live stream is very choppy whereas before with classic, it was fine. The recorded videos are fine as well (no choppiness evident). I have tinkered with various setting changes and the result is always the same. I am not showing any dropped frames and have done various internet speed tests with no issues found. I am attaching some logs from today showing the various setting changes I've tried. My specs are shown below.

Computer:
  • Corsair Carbide Series Air 240 High Airflow MicroATX and Mini-ITX PC Case - Black
  • Corsair Hydro Series H100i GTX High Performance Liquid CPU Cooler
  • ASUS uATX X99-M WS dual PCI-E 3.0 x16 DDR4 USB 3.1 with Bluetooth /audio /802.11ac Wi-FI onboard
  • G.SKILL 32GB (4 x 8GB) TridentZ Series DDR4 PC4-28800 3600MHZ For Intel Z170 Platform 288-Pin Desktop Memory
  • Intel Core i7-5930K Haswell-E 6-Core 3.5GHz LGA 2011-v3 140W Desktop Processor
  • Nvidia GEFORCE GTX 1070 Video Card
  • Samsung 950 PRO Series - 512GB PCIe NVMe - M.2 Internal SSD (MZ-V5P512BW)
  • 1TB Samsung SSD
Internet: On average 90-100 mbps up/down

Stream info: twitch.tv/kady26

Thank you for any help you can provide!
 

Attachments

  • 2017-01-08 16-21-48.txt
    10.5 KB · Views: 6
K

Kadi

New Member
Here are the additional logs as I am not sure they uploaded.
 

Attachments

  • 2017-01-08 17-36-17.txt
    18.8 KB · Views: 4
  • 2017-01-08 23-13-50.txt
    14.8 KB · Views: 5
EBrito

EBrito

Active Member
23:14:09.264: [x264 encoder: 'streaming_h264'] preset: ultrafast
....
23:19:35.976: Output 'adv_file_output': Number of lagged frames due to rendering lag/stalls: 25 (0.3%)
other log:
20:10:17.284: Output 'adv_stream': Number of lagged frames due to rendering lag/stalls: 13081 (5.6%)​
....
23:19:45.098: obs_video_thread(33.3333 ms): min=0.27 ms, median=2.159 ms, max=374.14 ms, 99th percentile=46.464 ms, 97.3963% below 33.333 ms
...
23:19:45.098: ┃ ┣download_frame: min=0 ms, median=0.002 ms, max=76.528 ms, 99th percentile=43.642 ms

Two monitors with very high resolution
17:36:17.280: output 1: pos={0, 0}, size={3840, 2160}, attached=true ------ 4K
17:36:17.280: output 2: pos={-2560, 0}, size={2560, 1080}, attached=true -------- ultrawide


You are maxing your GPU
Change downscaling filter to Bicubic

X264 CPU preset: ultrafast gets choppy image.
Try default veryfast, or superfast.
 
K

Kadi

New Member
Thanks for your response! I guess my questions would be - why would it suddenly become an issue with OBS Studio vs. Classic? I am using the same equipment and same settings. For the record, I've also tried streaming using my CPU vs GPU and the quality of the live stream actually improves slightly, although it's still has the choppy issue with Studio. I will give the change of downscaling filter a shot too. Thanks.
 
K

Kadi

New Member
After more tinkering, I tried changing my in game resolution to 1920x1080 and then the same settings in OBS studio and it looks fine. My in game quality is far less but at least my stream is not choppy. Not sure why it is different in this as I was playing in 4k before with no issues.
 
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