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Can't get completely smooth 1080p playback

post #1 of 4
Thread Starter 
No matter which software I try, it's almost impossible to get smooth playback of 1080p files (BluRay rips on MKV most of the time, but the source seems irrelevant; it happens with any 1080p material).

I'd say Total Theater 5 gives me the best results, but it force-switches my plasma to 60p, when it's capable of playing 24p material just fine. I can see the pulldown and don't like it

I can get perfect playback with a cheap bluray player. Why can't I get that with a powerful PC?

I'm using an Nvidia GT 430 with a Core 2 Duo E4600 (2,4 GHz) on Windows 7 32bit. I think this should be more than enough to play back any 1080p stream, but I still don't get completely smooth playback, no matter the source, at 24, 25, or 30 fps. CPU load when playing 1080p material is around 60-70%, with VLC, Windows Media Player, Windows Media Center, MPC-HT, anything.

I know I'm nitpicking. My wife will spot the flaws only if I tell her to look for them, but I can perfectly see dropped frames on slow camera movements that aren't there when played by the cheap bluray player. Is that to be expected? I was under the impression that Nvidia cards could decode and play 1080p better than standalone players. Am I wrong?

Will it make a difference if I try Linux and its players?

I'll appreciate all opinions.
post #2 of 4
Quote:
Originally Posted by comomolo View Post

No matter which software I try, it's almost impossible to get smooth playback of 1080p files (BluRay rips on MKV most of the time, but the source seems irrelevant; it happens with any 1080p material).

I'd say Total Theater 5 gives me the best results, but it force-switches my plasma to 60p, when it's capable of playing 24p material just fine. I can see the pulldown and don't like it

I can get perfect playback with a cheap bluray player. Why can't I get that with a powerful PC?

I'm using an Nvidia GT 430 with a Core 2 Duo E4600 (2,4 GHz) on Windows 7 32bit. I think this should be more than enough to play back any 1080p stream, but I still don't get completely smooth playback, no matter the source, at 24, 25, or 30 fps. CPU load when playing 1080p material is around 60-70%, with VLC, Windows Media Player, Windows Media Center, MPC-HT, anything.

I know I'm nitpicking. My wife will spot the flaws only if I tell her to look for them, but I can perfectly see dropped frames on slow camera movements that aren't there when played by the cheap bluray player. Is that to be expected? I was under the impression that Nvidia cards could decode and play 1080p better than standalone players. Am I wrong?

Will it make a difference if I try Linux and its players?

I'll appreciate all opinions.

I have the same card and a core 2 quad processor and finally gave up on trying to get 24p playback. I had the same issues you are having. I find it particularly odd that switching to 24p 3d causes no such problems. I don't know why that is. I use power dvd 12 btw. I really don't notice a huge difference between 24p when sent from my blu ray player to my panny plasma vs 60hz from my pc, (I am usually picky about all things home theatre) so I gave up trying different resolution combinations and now just sit back and don't worry about it. The home theatre ocd in me would love to hear if anyone has solved the issue or if nvidia does it on their end, but I am not holding my breath.
post #3 of 4
My AMD systems and AMD HD4550 work just fine playing 1080p .mkv files! I have a quad-core that uses 3~4% cpu and an old BE-2350 dual-core that runs around 14% cpu playing these directly with mpc-hc. As far as utilizing 24p I run MediaPortal and it has a refresh-rate changer utility that will switch my video once it reads mediainfo. BTW, I use the MPC-HC SAF inside MP to play my .264-based files.
post #4 of 4
This should be offloaded to your gpu if you set it up correctly and you should see very low cpu utilization(60% is high). Make sure dxva/hardware acceleration is enabled in whatever codec pack you are using for WMC/WMP. I believe vlc and mpc-hc have dxva/hardware acceleration options somewhere. XBMC has a dxva option you have to check.

Without using hardware acceleration I wouldn't expect a core 2 duo to playback bluray smoothly.

Changing from 60hz to 24hz always results in a worse experience for me so I stay at 60hz and can not see the pulldown.

Please report back on your success/failure when using hardware acceleration.
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