Sometimes OBS and livestream gets laggy

[Ivo Indice]

Hello,

I'm new to the forum:
I just bought a new laptop, with very good specs to make live streams.
On my first live stream with the new computer, everything was going well, but at middle of live obs started to become laggy, choppy for about 4/5 minutes, and then everything went ok again. And in the end, after about one and a half hours of stream it made the same thing again, for 3/4 min.
I don't know whats the problem and need help trying to figure it out.
I played safe with the streaming specs, it was 1080p 25f quality at p4, 2500kb.... My internet was by cable 300mb/s. I had 3 cams in 1080p 20mb/s record 25fp conected to a feelworld L4, everything recording on the cams, i had the sound going to a zoom L8 and connected the output to the feelworld, and the feelworld was connect to the pc by usb 3.0 cable. I had a external output monitor just to check colors and there everything went smooth, never shutters...
I read first the FAQ's on this forum, and everything was made accorddenly. Just OBS open, and google chrome with facebook live.
OBS registered 0.1% or 0.2% CPU of usage. So i don't really know why it sometimes shutter...
Should i next time record on 50fps and send in 50fps, so in the case it gets laggy, it doesnt show up on the live stream?

Here is the log file from OBS: https://obsproject.com/logs/cmwCAqzOxdmZtx8W

Thanks in advance, i hope someone can help me.

PS: i bought this computer, because on my last livestream my old laptop was supper choopy, like all times 90% CPU usage, and the live stream after 20 min became really really choopy, barely usable for viewers.

 

[Lawrence_SoCal]

Hello,

I'm new to the forum:
I just bought a new laptop, with very good specs to make live streams.

Even the best computer (way more powerful than what you just got) can be crippled by a demanding workload

On my first live stream with the new computer, everything was going well, but at middle of live obs started to become laggy, choppy for about 4/5 minutes, and then everything went ok again. And in the end, after about one and a half hours of stream it made the same thing again, for 3/4 min.
I don't know whats the problem and need help trying to figure it out.

Looks like something is wrong at Operating System level ... this shouldn't be in the log
Did you reboot PC within a few hours before starting using OBS Studio? IF PC locked/put to sleep regularly, and NOT rebooted often (I stick with a daily reboot, out of habit. I never ever go more than a day or two without a full reboot.)

16:46:44.014: ==== Streaming Start ===============================================
16:47:09.352: Max audio buffering reached!
16:47:09.352: adding 960 milliseconds of audio buffering, total audio buffering is now 960 milliseconds (source: Áudio do ambiente de trabalho)
16:47:09.374: Source Áudio do ambiente de trabalho audio is lagging (over by 172294.19 ms) at max audio buffering. Restarting source audio.

The above means somethign is wrong... and needs to be fixed.

I played safe with the streaming specs, it was 1080p 25f quality at p4, 2500kb.... My internet was by cable 300mb/s.

Download bandwidth relatively irrelevant. Is that Synchronous upload and download speed (nice, if yes)? And lots of upload bandwidth doesn't help if other device(s) using that bandwidth. But presuming computer itself (not live /Live/Preview window) was lagging, then bandwidth not likely issue. On Sunday, FB Live Preview didn't even work for us at all (black screen) ... FB changed something... but livestream was fine...

I had 3 cams in 1080p 20mb/s record 25fp conected to a feelworld L4, everything recording on the cams, i had the sound going to a zoom L8 and connected the output to the feelworld, and the feelworld was connect to the pc by usb 3.0 cable. I had a external output monitor just to check colors and there everything went smooth, never shutters...
I read first the FAQ's on this forum, and everything was made accorddenly. Just OBS open, and google chrome with facebook live.
OBS registered 0.1% or 0.2% CPU of usage. So i don't really know why it sometimes shutter...

Problem is ... that OBS Stat CPU monitor is really a worthless stat to monitor (in my opinion) ... what you ACTUALLY need to know is overall CPU utilization (at Operating System level)... as well as RAM, Disk I/O, etc
While at it, (OS included native tools, Task Mgr or Resource Monitor, there are other options)

Is PC seeing all 3 cameras, or are you video switching on the Feelworld (HDMI switcher?), and only a single video feed going to OBS Studio PC?
That many cameras could be causing a USB Root Hub contention issue, if all cameras video feeds going to OBS Studio.. depending on details

Beware background processes/tasks on OBS Studio PC that could be causing an issue (like a data backup file sync, ex.. locally recorded video output from OBS Studio...)

Made worse, possibly by other activity/devices connected to computer (won't show up in OBS Studio log) .. but only a guess

Should i next time record on 50fps and send in 50fps, so in the case it gets laggy, it doesnt show up on the live stream?

Presuming issue is System overload, that would only make matters worse, most likely

though unlikely to be issue, your screen is 60Hz, so an even multiple would be 30fps instead. might be worth testing, after checking some of the above

 

[Ivo Indice]

Hello,
Thanks for your answer!

Did you reboot PC within a few hours before starting using OBS Studio?

Yes, like one our before stream.

Is PC seeing all 3 cameras, or are you video switching on the Feelworld (HDMI switcher?), and only a single video feed going to OBS Studio PC?

Only single video going to OBS, the final image from feelworld.

though unlikely to be issue, your screen is 60Hz, so an even multiple would be 30fps instead. might be worth testing, after checking some of the above

The option i have in the computer are 165Hz or 60Hz, but i don't think this is the problem.

16:46:44.014: ==== Streaming Start ===============================================
16:47:09.352: Max audio buffering reached!
16:47:09.352: adding 960 milliseconds of audio buffering, total audio buffering is now 960 milliseconds (source: Áudio do ambiente de trabalho)
16:47:09.374: Source Áudio do ambiente de trabalho audio is lagging (over by 172294.19 ms) at max audio buffering. Restarting source audio.

The above means somethign is wrong... and needs to be fixed.

I will try to figure this out.

Thanks