Hi

I am trying to use desktop capture on the local machine to capture video of a PC game.

The problem is that the capture rate is very low. Even when setting the framerate to 30, it appears I am only recieving the default 5 fps.

My CPU is not overloaded so I am not sure what the issue is.

How can I improve the FPS of the desktop capture?

Kind regards,
Doble

Hi,

The Desktop Capture program is limited by the performance of the graphics card.
So when you are using a game that uses 100% of the graphics card, the capture program won't have much performance left to work with.

There are programs out there that capture gameplay use a variety of techniques to try and improve this but they have issues as well.

Flawless game capture involves using the HDMI output of the computer set to a HD resolution such as 1080i 60hz and then capturing that
using an Intensity Pro card in the vMix computer.

Regards,

Martin
vMix

While continuing to work on this, I ended up finding the VH Screen Capture Driver - it creates a virtual webcam and captures video from the screen to it. This way I can add it to vMix as a 'capture' source. Info here - http://www.splitmedialab...eo-sdk/vh-screen-capture

Unfortunately, I am having another problem with this -

When I add the capture source, the preview either shows a black screen, or shows 1 frame of the video, inverted and upside-down, no further frames are shown.

I have tested the capture source in other programs like Skype and it works perfectly.

I have also found that when I go to the 'advanced' tab of the input for the camera, and select the driver and choose 'properties' the driver configuration window appears, but vmix crashes.

If we can get desktop capture working as intended then I won't have to go down this route, but really the VH Screen Capture driver should work as well!

I have a quick test version of the Desktop Capture program available that should be a lot faster.
It uses JPEG compression instead of PNG as well as a couple of other optimisations.

Email me at info@vmix.com.au and I will email you a copy to try out.

Regards,

Martin
vMix

Hi Martin

Thanks for that - the test version is definitely better, I'm getting around 12-15FPS now, but I still need a higher framerate, at least 25FPS.

Is there anything else that can be done to the capture server? or alternatively, is it possible to use the VH Screen Capture driver instead?

Thanks for your help with this!

Hi,

Further optimisations have been made that should make the capture even faster but they require vMix changes so they won't be available until
the next version of vMix due in a couple of weeks time.

Regards,

Martin
vMix