Twitch issues when transcoding 2160p60

Ilya 2022-05-06 06:53:33 UTC in Nimble Streamer


I did 12 youtube repudblishing rules 2160p60 and all is ok. However when I am trying to transcoder 2160p60 to 1080p60 (audio passthrough) - twitch is lagging. For Twitch I am using recommended settings
Resolution: 1920x1080
Bitrate: 6000 kbps
Rate Control: CBR
Framerate: 60 fps
Preset: medium
Profile: Main

Any ideas,

Alexander 2022-05-06 07:16:35 UTC 

Hello Ilya,
- Take a look at nimble.log for any related messages first, regarding transcoding or stream transmission;
- Check the playback from your server locally;
- Perhaps, the interleaving compensation might help:
More details are needed regarding your stream, you can file a new ticket in our helpdesk, or follow the #36073 one.

Ilya 2022-05-06 09:38:06 UTC 

From log I have:

[video_decoder] E: failed to decode video in appropriate rate from [live/smpracing] - what is mean?

also sometimes:
[encoder] E: failed to read audio in appropriate rate [live/smpracing]

Ilya 2022-05-06 09:44:37 UTC 

Also open input stream by VLC after transcoding and it is choppy

Ilya 2022-05-06 09:45:16 UTC 

Look like problem with transcoding as stream is input

Alexander 2022-05-06 13:56:55 UTC 

Ilya, these reports are related to the performance of your machine, it's likely that the CPU is not fast enough to process that particular input.

Ilya 2022-05-06 15:11:21 UTC 

HP Z820 - 2 CPU XEON E5-2690
12 republish rules + 1 transcoding + control + ...

CPU Load 29%
Memory 23
ssd 0

Ethernet s: 363 r: 60

Ilya 2022-05-06 15:15:23 UTC 

Is it any chance to understand and get help with transcoding to twitch - email is

Alexander 2022-05-06 15:21:09 UTC 

Ilya, the Single thread performance is an important thing for Transcoding as well, not only the number of cores matter in this case.
E5-2690 (and which version is it?) doesn't look like a winner here:
That CPU looks fine for a heavy loaded WEB server, or for the Transmuxing task with Nimble, but not for a heavy input (2160p60) Transcoding.
You're running Transcoder under Windows OS, there is no handy way (as under Linux) of getting the per-thread load to check my assumption.

Ilya 2022-05-06 15:29:00 UTC 

Intel(R) Xeon(R) CPU E5-2690 0 @ 2.90GHz 2.90 GHz (2 processors)

Ilya 2022-05-06 15:29:40 UTC 

I think 30 percents is not very heavy load

Ilya 2022-05-06 15:31:57 UTC 

(2160p60) Transcoding = CPU Load ? GPU Load?
As I am only change frame size do not understand where is load:((

Ilya 2022-05-06 15:35:04 UTC 

Also it is my home computer - at work I have more powerful - but Twitch lagging is the same !!!!
AMD Ryzen Threadripper 3970X 32-Core Processor 3.69 GHz 64,0 ГБ (доступно: 63,9 ГБ)

Alexander 2022-05-06 15:39:25 UTC 


E.g i have a E3-1230 v6 as a test machine nearby and it hardly processes a single 2160p60fps input with an affordable quality.

All the E5-2690 (x) samples look even less productive in single thread in comparison to my available E3-1230 v6:

If you have an NVENC compatible GPU in your server, you can try it instead:

Ilya 2022-05-06 15:50:31 UTC 

How I can try it? I am using Nvidia Quadro M4000 and can change to Geforce GTX 1080ti

Ilya 2022-05-06 15:51:48 UTC 

My GPU load is 0

Ilya 2022-05-06 15:52:48 UTC 

for video encode/decode

Ilya 2022-05-06 15:53:32 UTC 

From log [2022-05-06 17:50:37 P16732-T5748] [tranmain] I: Quadro M4000 nvenc device 0 found

Alexander 2022-05-06 15:55:10 UTC 


> I think 30 percents is not very heavy load
I've described the importance of a 'Single thread performance' already, please read it carefully

For a deeper analysis, instead of bombing the short messages here at forum like in a chat, file a ticket here please and provide more details regarding your other available CPUs and so on:

Alexander 2022-05-06 16:02:06 UTC 

> [tranmain] I: Quadro M4000 nvenc device 0 found
Good, NVENC should be avaialble.
Choose Decoder: NVENC and Encoder: NVENC in your transcoder pipeline.
More setup details;

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