Only getting 37.5fps on 720p channels

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Wiseacre

44 posts

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#25298 18-Aug-2008 10:11

Howdy folks,

I'm only getting 37.5fps on TV1 and TV2 (720p DVB-T), same as reported here - Frame rates - what are people getting with DVB-T
This seems to be an XP/vmr9 issue - has anybody found a fix for it? Does anybody know why it does this? Does anybody get 50fps on the 720p channels? If so, what video card do you use, nVidia or ATI? I started up a thread in the MediaPortal forums, but no-one seems interested - Only 37.5fps on Progressive channels.
For most people the fix seems to be to upgrade to Vista; tried that, and get absolutely awful video quality - frames dropping left, right, and centre for 720p and 1080i; jerky, stuttery, fast/slow/fast playback of dvd's - totally unwatchable, so reverted back to XP. I started a thread at MediaPortal forums on this too - Vista Hardware Acceleration not working?
I'm using an 8600gt for hardware acceleration.
Any thoughts and ideas on this issue would be most appreciated.

Cheers,
Wiseacre

Jarno

270 posts

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#158138 19-Aug-2008 21:03

I can't really help, other than saying "me too". And it's not due to a lack of horsepower. The CPU is ticking over at barely 10% and I have a 8800GT.

I'm wondering if the FPS display in MediaPortal is actually correct on this. The fact that 37.5 is exactly 3/4 of 50 sounds suspicious. Like it's intentionally skipping every 4th frame.

---JvdL---

richms

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#158145 19-Aug-2008 21:17

How does the motion look tho? That constant judder should stand way out.

Richard rich.ms

Wiseacre

44 posts

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#158210 20-Aug-2008 06:54

Definate judder there - not so noticable on 'still' shots, but really apparent on fast panning shots (olympics) & when credits roll. It runs at a smooth 50fps in Vista (when it works ;-), the difference is remarkable - and when you know somethings not working quite right, it becomes that much more apparent & grating on the eyes!

sbiddle

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#158215 20-Aug-2008 07:52

What renderer were you using under Vista? EVR is the best renderer option available and the only way to get hardware acceleration under Vista - you cannot use a VMR renderer under Vista and get H.264 hardware acceleration.

Wiseacre

44 posts

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#158224 20-Aug-2008 08:56

Yip, using EVR - that was the whole reason I decided to finally go for Vista! I've got DVB-T working in Vista (mostly); still dropping frames, only about 1-2 per minute (unlike the 10-20 per minute previously) so it's not terribly noticeable, but still a concern - definate improvement over the 37.5fps on 720p channels in XP though. DVD playback under Vista is still sub-par with the jerky, stuttery, fast/slow/fast playback - I don't understand it, DVD playback should not be a problem these days.
Using MediaPortal, Cyberlink decoders, EVR in Vista, VMR9 in XP.

sbiddle

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#158227 20-Aug-2008 09:03

Wiseacre: Yip, using EVR - that was the whole reason I decided to finally go for Vista! I've got DVB-T working in Vista (mostly); still dropping frames, only about 1-2 per minute (unlike the 10-20 per minute previously) so it's not terribly noticeable, but still a concern - definate improvement over the 37.5fps on 720p channels in XP though. DVD playback under Vista is still sub-par with the jerky, stuttery, fast/slow/fast playback - I don't understand it, DVD playback should not be a problem these days.
Using MediaPortal, Cyberlink decoders, EVR in Vista, VMR9 in XP.

Try the Arcsoft Totalmedia Theatre H.264 codec. After using this for several weeks I'd never go back to PowerDVD, it is superior in every aspect.

Wiseacre

44 posts

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#158314 20-Aug-2008 12:35

Cheers for the recommendation - seems to work well for h.264 material (still get the occasional dropped frame; not excessive) but dvd's don't play at all now, with any codec; uninstalled & went back to Cyberlink decoders.

Quidam

291 posts

Ultimate Geek

#158338 20-Aug-2008 13:53

sbiddle: Try the Arcsoft Totalmedia Theatre H.264 codec. After using this for several weeks I'd never go back to PowerDVD, it is superior in every aspect.

I agree. I'm using this for bluray playback. Combined with anydvdHD this is an unbeatable tag-team of great software that does the job without getting in the way.

"There is no way to Peace -Peace is the Way" (A. J. Muste)

geekiegeek

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#158552 21-Aug-2008 09:14

I changed to Arcsoft codec last night - no more dropped frames and no more stutter on 720p (TV1).

The ticker on Breakfast this morning was nice and smooth.

And to think I was about to get up on the roof this weekend with my laptop and a signal checking software!

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