Stutter after refresh rate change (1 Viewer)

[Scythe42]

So how do we continue here? I'm out of ideas...

Is there a way to simulate the alt-tab effect after a refresh rate change? I mean repainting the whole window like it was moved (need to work for fullscreen as well)? That might be an acceptable solution. Any idea how to do it?

Turning off Aero is a bad idea. But if this is the only possible solution we have to time the vsync by ourselves to avoid tearing if Aero is turned off. I only want to go this route if there is really no other option.

 

[Scythe42]

Out of desperation as I am not willing to give up yet:

Let's see if sending a WM_PAINT message after the RR change to the handle of GetForegroundWindow() will do the same as Alt-Tab. Or better an InvalidateRect() followed by an UpdateWindow() as WM_PAINT shouldn't be sent by an application (I don't care if it works...).

Maybe this does the trick, but I doubt it. Any other suggestions how to simulate what Alt-Tab does?

 

[tourettes]

can you un focus an application? At least you can do it the other way around. If that is not possible we could create an invisible window that gets focused, then focus MP after that and delete the invisible window

 

[nyt]

can you un focus an application? At least you can do it the other way around. If that is not possible we could create an invisible window that gets focused, then focus MP after that and delete the invisible window

It's not just unfocus. If you hit alt-tab real quick before aero "hides" mediaportal, the stutter will not go away.

If you move the window, or do windows-tab (fancy 3d alt-tab) it fixes it right away.

Is the SVN source available anywhere? If so I'll play around in my spare time and see if I can get anything working if this hits a wall.

What about toggling v-sync after playback starts?

 

[Scythe42]

Is the SVN source available anywhere? If so I'll play around in my spare time and see if I can get anything working if this hits a wall.

MediaPortalDevelopment/MediaPortalSVN - MediaPortal Manual Documentation

 

[nyt]

Is the SVN source available anywhere? If so I'll play around in my spare time and see if I can get anything working if this hits a wall.

MediaPortalDevelopment/MediaPortalSVN - MediaPortal Manual Documentation

Nice. I'll take a stab at setting up an environment to get this running after work. Please keep us posted if you make any progress =]

 

[onyx666]

So how do we continue here? I'm out of ideas...

Is there a way to simulate the alt-tab effect after a refresh rate change? I mean repainting the whole window like it was moved (need to work for fullscreen as well)? That might be an acceptable solution. Any idea how to do it?

Turning off Aero is a bad idea. But if this is the only possible solution we have to time the vsync by ourselves to avoid tearing if Aero is turned off. I only want to go this route if there is really no other option.

did you already find time to check how xbmc solved this problem as posted a few pages back ?

 

[nyt]

So how do we continue here? I'm out of ideas...

Is there a way to simulate the alt-tab effect after a refresh rate change? I mean repainting the whole window like it was moved (need to work for fullscreen as well)? That might be an acceptable solution. Any idea how to do it?

Turning off Aero is a bad idea. But if this is the only possible solution we have to time the vsync by ourselves to avoid tearing if Aero is turned off. I only want to go this route if there is really no other option.

did you already find time to check how xbmc solved this problem as posted a few pages back ?

xbmc doesnt use evr

 

[nyt]

Doing some debugging, I've found this.

Video starts with stutter:

2010-01-16 00:16:53.313500 [Debug][MPMain]: CycleRefreshRate: successfully changed refresh rate to 23.97Hz (23Hz requested)
2010-01-16 00:16:53.313500 [Debug][MPMain]: currentfps: 59


(window is moved here, playback smooths out)

Change back to 60fps for desktop:

2010-01-16 00:17:14.220500 [Debug][MPMain]: CycleRefreshRate: successfully changed refresh rate to 60Hz (60Hz requested)
2010-01-16 00:17:14.220500 [Debug][MPMain]: currentfps: 0

Video starts without stutter:

2010-01-16 00:17:23.301500 [Debug][MPMain]: CycleRefreshRate: successfully changed refresh rate to 23.97Hz (23Hz requested)
2010-01-16 00:17:23.302500 [Debug][MPMain]: currentfps: 24


I added Log.Debug("currentfps: {0}", GUIGraphicsContext.CurrentFPS); to CycleRefreshRate after the Log.debug on successful change.

Also something else I see...
W7RefreshRateHelper.SetDisplayConfig(...): SDC_VALIDATE of 24000/1000 failed
W7RefreshRateHelper.SetDisplayConfig(...): SDC_VALIDATE of 24000/1001 failed

depending on whether you set to 23.976 or 24, it always fails.

I added a case for 23970 and it sets the display properly, but no change with stutter issues.

2010-01-16 01:32:37.038200 [Debug][MPMain]: W7RefreshRateHelper.SetDisplayConfig(...): SDC_VALIDATE of 23970/1000 succesful
2010-01-16 01:32:37.687200 [Debug][MPMain]: W7RefreshRateHelper.GetRefreshRate: QueryDisplayConfig returned 23970/1000
2010-01-16 01:32:37.688200 [Debug][MPMain]: CycleRefreshRate: successfully changed refresh rate to 23.97Hz (23.97Hz requested)
2010-01-16 01:32:37.688200 [Debug][MPMain]: currentfps: 60

2010-01-16 01:37:11.569200 [Debug][MPMain]: W7RefreshRateHelper.SetDisplayConfig(...): SDC_VALIDATE of 23970/1000 succesful
2010-01-16 01:37:12.216200 [Debug][MPMain]: W7RefreshRateHelper.GetRefreshRate: QueryDisplayConfig returned 23970/1000
2010-01-16 01:37:12.216200 [Debug][MPMain]: CycleRefreshRate: successfully changed refresh rate to 23.97Hz (23.97Hz requested)
2010-01-16 01:37:12.217200 [Debug][MPMain]: currentfps: 59

 

[tourettes]

I added a case for 23970 and it sets the display properly, but no change with stutter issues.

Sounds like adriver bug if such is required.