FIXED: High GPU usage with VIdeo Device In set to Directshow mode and laptop webcam

Bugs
1

:partying_face: I have found the cause of this problem (the one that I have described in edit part of previous post), and it isn’t related to Engine as I was previously thinking (sorry for that). I was just tricked into thinking there might be something going on with Engine, but it was all related just to placing Video Device In TOP in project…

If I add Video Device In TOP to a project with higher GPU utilization, it somehow tanks whole GPU (making it run at 100% load). Deleting the TOP won’t help - the only way to get rid of this side effect is to restart the project. I feel like it is related to DirectShow (the default library choice when adding Video Device In TOP). I am super happy to find this, as now I can sleep well (knowing that my project won’t start lagging in production) :slight_smile:

Nevertheless, I thought you might be interested in this behavior, so I have recorded a demo video which you can download here:

EDIT, Michel: The original issue was discussed in the following thread and had to do with some mouse lag that seems unrelated to this secondary issue.

2

And @monty_python

Thanks for the report and sharing files.

I will be looking into it and try to reproduce.

Best,
Michel

3

Hey @monty_python

Great video, thanks. Sadly I cannot quite reproduce here.

  • Were you able to reproduce the same issue on another machine ?

  • If you open the project with the Video Device In already set, what happens ?

  • If you change the direct show device to be another device than your integrated webcam, what happens ?

Thank you for your time,

Best,
Michel

4

@JetXS thanks for looking at the files.

I will test these scenarios, but it will take me a bit more time. If it wouldn’t be a problem for you, I would postpone this until get past the deadline I am approaching right now (I have a show coming up this month, but once it is done, I will get back to this). Would that be ok? Thanks.

5

Yes, if you don’t have use of this on your show no worries then.

Just note that, to me, the Lister COMP / perform mode mouse lag doesn’t seem to have anything to do with this Video Device high resource usages.

They are likely 2 different issues.

Best,
Michel

6

I am using Video Device In, but with blackmagic library, which is working nicely (no problem there). :slight_smile:

Yes, absolutely, I just mixed up them in this thread (sorry for that).

1 Like
7

I’ll split the threads for clarity.

1 Like
8

Hello @JetXS,

I am sorry about the delay - it took me a while to get back to this.
However, I have just realized that delay was actually a good thing as I have tested this now and the problem is gone. :smile:

I recall I gave it a quick look back when 2022.31030 came out and the problem was there, but now it works like a charm. Since I haven’t done any modifications to my system except some Windows updates, I am guessing there really was something bad happening on Directshow side and the updates fixed it. :man_shrugging:

This was sort of like a forgotten Christmas gift. I am marking this fixed. :smile:

1 Like