Increase screen capture frame rate?

[cdpearce]

Is it possible to release a version of the UScreenCapture DirectShow filter that allows the frames per second rate to be set to 60? The current limit is 30, but I would like to be able to create a 720p HD stream that would require capturing the screen 60 times per second.

[admin]

Not sure why this requires 60 fps...For screen capture it's a totall CPU kill - even 30 fps is a kill.
In general, there is no much sense to capture screen at rates more than 15 fps.

[cdpearce]

It's streaming just fine for me at 30fps. CPU utilization is around 14% with an i5-2400 processor. What makes no sense is arbitrarily saying that I am forbidden to run at 60fps if my application would benefit from it. Everyone who has an inadequate CPU or no need for 60fps is welcome to continue capturing at 15! But, why set an arbitrary limit in the software? It doesn't hurt anyone else for me to go higher.

If you really want to discourage people from using it, how about a Boolean in the configuration that is "no-paramter-validation-check" or something like that? Tell people never to set it unless they want unpredictable and unsupported results. But, if you set it, the software will not validate any of the parameters and you can try something as "crazy" as 60fps capture if you want to.

Call it "software over-clocking" if you like!

[cdpearce]

So, is that a "no" on increasing the frame rate?

[admin]

When we have time.....sorry

[rogerdpack]

In a desire to be "as cool" as the unreal directshow desktop capture, which is apparently setting the timestamps "right" but my own filter not, how do you guys set the timestamps on each dshow sample?

it is something like the equivalent to
frame_length = 1/30.0;
CSourceStream::m_pFilter->StreamTime(now);
SetTime(&now, &now+(frame_length)); ?

Thanks!
-roger-

[admin]

- Is there anything on the Earth that really matters,
such a thing that could change the way events happen not only on Earth but even in other worlds? - asked I of my teacher...
- Yes there is - answered he
- What is it?
- It is.... - began my teacher but has suddenly stopped...
I was standing and tensely waiting for his answer...He, however, was silent
And I was standing and I was silent
And he was silent too
And I was standing and waiting and kept the silence
And he kept the silence too
Both of us are standing in silence
Ho-la-la!
Both of us are silent!
He-le-le!
Yes, we both are standing and keeping the silence!

Daniil Kharms, 16-17 of July 1937