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24p motion stutter (only with hardware acceleration!)

Posted: Tue Jul 12, 2011 11:59 am
by hanslennaerts
Since a year I've been an intensive user of Splash. All this time the following problem exists:
- play 24p movie
- use hardware acceleration
- set PC's video output to 24Hz
The above combination will give terrible stutter. This has been tested on several ATI and nVidia cards.

However when you use Mirillis' software decoder, everything plays perfectly smooth!

My current setup is to set the PC's video output to 60Hz. Then the hardware acceleration works. I let my Panasonic TV do the motion interpolation. My CPU can't handle Motion2.

While the 60Hz setup gives acceptable results, you're at the mercy of the motion interpolation (in my case the TV's). To play back a movie as true as possible to the original, sometimes 24p without motion interpolation would be nice.

I'm puzzled why this gets broken by hardware acceleration...

Re: 24p motion stutter (only with hardware acceleration!)

Posted: Wed Jul 13, 2011 7:37 am
by lbamda
I confirm this problem - very unpleasant bug.

Re: 24p motion stutter (only with hardware acceleration!)

Posted: Tue Jul 19, 2011 4:47 pm
by Ghost
Please check the latest 1.10 version as it introduces support for HDTV 24Hz mode.

Re: 24p motion stutter (only with hardware acceleration!)

Posted: Mon Aug 01, 2011 9:42 am
by hanslennaerts
Ghost wrote:Please check the latest 1.10 version as it introduces support for HDTV 24Hz mode.
I'm sorry to say that with this version the stutter remains. And when using the software decoder motion is smooth. I use an nVidia GT440 graphics card.

To test, I've switched off motion compensation on the TV. Then you can see a repeating cycle of a few seconds smooth video followed by a few seconds jerky video.

Re: 24p motion stutter (only with hardware acceleration!)

Posted: Thu Aug 11, 2011 12:11 am
by Ghost
What is your multidisplay setup?
DO you use Tv as extended desktop, clone or do you use only 1 display at a time? Please make also check if this problem occurs with all Picture2 enhancements disabled.

Re: 24p motion stutter (only with hardware acceleration!)

Posted: Mon Sep 12, 2011 9:16 pm
by Knight
I can confirm that even with 1.11 stutter...and even with all the Picture2 settings disabled. :-(

Re: 24p motion stutter (only with hardware acceleration!)

Posted: Thu Sep 15, 2011 8:50 pm
by Ghost
Knight wrote:I can confirm that even with 1.11 stutter...and even with all the Picture2 settings disabled. :-(
What is your setup? graphics card model and do you use multi display setup?

Re: 24p motion stutter (only with hardware acceleration!)

Posted: Fri Sep 16, 2011 3:01 pm
by Knight
Ghost wrote:
Knight wrote:I can confirm that even with 1.11 stutter...and even with all the Picture2 settings disabled. :-(
What is your setup? graphics card model and do you use multi display setup?
Intel i3, ATI 5650, 4GB RAM. No multi display.

Re: 24p motion stutter (only with hardware acceleration!)

Posted: Sat Nov 19, 2011 1:53 am
by dandyqb
speaking of stuttering, am also encountering this on my htpc(laptop) in any level of motion2, btw here's the specs of my laptop, i5-2410M, NVidia GT540M 2gig CUDA, 6gig RAM, Win7 Ultimate 64bit, i dont know if my specs is not quite enough for motion2 or i really need a desktop PC... :)