1080p films only smooth @ 24hz but this breaks live TV

juno_first

juno_first

juno_first

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Ive finally got a 1080p TV to use with a HTPC using Windows Media Center.
Although the only absolute way to play 1080p films smooth is to set the TV refresh rate at 24hz. I presume because films are usually 23.98fps.

At 24hz the TV's 100hz local rate is not supported.
Ive tried the other 50/60hz rates combined with the TV's 100hz local capability & 1080p video always stutters, either a constant stutter or smooth video then a major stutter every few seconds.
One combination of refresh rates even caused an ever increasing lip-sync fail, increasing by about 1 second per minute :eek:
Ive tried all the HD inputs on the TV too.
I thought a TV firmware update fixed this problem but no joy.

Ok, so I can live with 24hz, although I also use the HTPC for viewing FreesatHD which is broadcast or received as PAL 25fps.
At 24hz the FreesatHD has developed a major stutter, I presume because its not at 24fps?

Does anyone else use a HTPC for 1080p films + TV ?
If so, how did you fix the refresh rate problems associated with 1080p.
thanks

Rig as in sig is also used for gaming/internet on a 2nd 32" 720p TV.
TV= Sharp Aquos LC46LE700E.
Tried codecs: ffdshow, mpc, divx, dxva, core-avc with haali splitter for mkv.
Settled with Core-AVC with AC3 filter 1.63b with Windows 7 64bit.
 
There is no solution as far as I know. You'll just have to try and get PAL MKV's.

There was some plugin I tried once (that I couldnt get to work) that detects the fps of a video and sets a custom refresh rate via a script.

Another option is to have full screen mce at 1080p50 and your desktop at 1080p60, so TV looks fine, but I can view switch to a big windowed mode to watch NTSC stuff
 
thanks
Ah, so this is a problem & Im not missing something rather simple lol.
Just checked my mkv material & its all 23.98fps.
I thought NTSC was from the olden days of DVD's & 525lines vs 600lines.

The TV has a 'film' mode, i'll try a few refresh rate combinations with that before resorting the TV's freeviewTV & loose the 2 HD channels on FreesatHD + live TV recording.

Darn the yanks and 23.98fps. lol
 
Its not really NTSC, but its the same principle and the same problem. Your live TV is 25fps and you cant change that in anyway, but 90% of avi's and MKVs are 24 or 30fps, so you need a refresh rate of 24 or 60 to get rid of stuttering. A 100hz might work for all formats, but try and find a TV that does 1080p100 via HDMI...
 
You want a setup you can quickly change between refresh rates with, shortcut keys for example. Or a system which detects frame rate and adjusts automatically, XBMC does this but doesn't support live tv.

Lanz said:
Its not really NTSC, but its the same principle and the same problem. Your live TV is 25fps and you cant change that in anyway, but 90% of avi's and MKVs are 24 or 30fps, so you need a refresh rate of 24 or 60 to get rid of stuttering. A 100hz might work for all formats, but try and find a TV that does 1080p100 via HDMI...
Click to expand...

PAL/NTSC doesn't really exist anymore (well not in this context). Films whether they be on bluray/ripped/whatever are 24fps, end of. Some old PAL DVD's would speed them up slightly to 25fps to help, some players used 3:2 pulldown to help. Now we've got 24fps support through the whole chain we don't need any of this bs, and you can enjoy films as they should be.
 
or this

http://damienbt.free.fr/index.php#download

Last version of Media Control : version 6.0.6

New feature : dynamic refresh rate change.
Sometimes the videos refresh rate (NTSC versus Pal) does not always match the refresh rate of your monitor. This features brings the possibility to change dynamically change the refresh rate of your screen when a video is launched to match its refresh rate.
 
Lanz said:
or this

http://damienbt.free.fr/index.php#download

Last version of Media Control : version 6.0.6

New feature : dynamic refresh rate change.
Sometimes the videos refresh rate (NTSC versus Pal) does not always match the refresh rate of your monitor. This features brings the possibility to change dynamically change the refresh rate of your screen when a video is launched to match its refresh rate.
Click to expand...

Tried 64bit version of this but like rrc it has no effect.
Im thinking the drivers or something is stopping the refresh rate changing?
 
Native 24p is just as bad as the effects of 3:2 pulldown imo. I spent aaaaages trying to get rid of the judder in my bluray playback, but only succeeded in finding that native 24fps is just as stuttery as 60Hz with 3:2 pulldown artifacts. In short, until they introduce 48p recordings (supposedly in the pipeline, I read somewhere) we're stuck. I do feel your pain bro.
 
Using a DVI to HDMI 5m cable.

HURRAY, fixed it.
Using a custom resolution of 23.976hz which the PC thinks is 23hz & the TV thinks is 24hz.
There is now absolutely NO stutter & its amazing to watch smooth video for the first time ever.
Using core-AVC cuda which recognizes 64bit with AC3 filter 1.63b (64bit).
Theres only 1 film that dont play right because it uses DTS-HDMA, which FFDshow audio can handle but ffdshow cant handle surround sound on all the vids.

Figured out the refresh rate changer in wmc by only using a single display & not dual monitor, I just select 24hz for films/videos or 50hz for PAL 25fps tv which now plays smoother than before, which can clearly be seen with the scrolling text on the news channels.

Below is a quote from a review for my TV, so looks like I was lucky after all...

Putting its faults aside, Sharp has improved their new range in number of areas, not least its 1080p/24 handling. Out of all the HDTVs I have tested thus far, the Sharp LC46LE700E clearly has the edge in 24p processing: the motion was stupendously fluid and on par with analogue-film-based projectors. 100Hz MCFI was disabled throughout the testing process so that wasn’t the explanation, but if I had to guess, I would say some sort of video-smoothing technology was deployed to induce the appearance of free-flowing motion without destroying the “film look”. I for one would love to see such processing adopted by other manufacturers.
 
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