24p playback on ATI 4850?

I'm using an ATI 4670 and I simply set the refresh rate in the
Catalyst Control Center to "23hz" (which I suppose equates to 23.976) and I have no problems on my Epson 1080UB projector
at 1920x1080 24p.

It "passes through" an Onkyo 876 AV receiver on the way.

I do use the ATI DVI to HDMI adaptor at the video card output.

Uhh the 4850 can eat HD video for lunch. If you're getting performance problems, the issue is with something else:

1. Your CPU.
2. Your memory.
3. Your storage.
4. Any of the two dozen pieces of software involved in playing your 24p source material.

RTFM.... I have had perfect 24 fps on a 4670, 4850, 4870 & 4890 in single and crossfire configurations. Set the refresh rate to 24 HZ. If you can't get it to work you have other bottlenecks in your setup. It would be helpful if you posted what mbo, OS, etc... you don't provide any useful info for diagnostic purposes.

Kurisu2 as a consolation I understand what you are saying. Everytime I select 24p the mouse and everything feels very slow. Image transitions (loging in, firing up vmc) makes my oc'ed quad behave like a pentium 1 and my 8gb of ram like a 8mb stick. Movies plays fine though. It appears as if 24fps is too slow for windows. 50hz flies, 24hz s o o o o s l o w. I tried different systems, oses, graphics cards, memory, cpu, mobos result is exactly the same, pc/gfx power doesn't matter.

You won't get rid of this. Everything in Windows will feel laggy when using 24Hz. The only thing that works in 24Hz are videos that are recorded at 24 Hz. 50Hz and 60Hz material will be horrible at 24Hz - much, much worse than a 24Hz source running at 60Hz.

Basically, you have to turn on 24Hz when wanting to watch a 24Hz source, and leave it on 60Hz when not. This is the challenge people work on - getting their HTPC to automatically change the refresh rate based off the source of the video playing. It's possible with a combination of several programs, but tricky.

I haven't bothered with trying to figure it out myself because I get audio out-of-sync issues like you mentioned and I haven't felt like taking the time to deal with it because I'm not seeing major 3:2 pulldown issues that warrant me to take the time to get 24Hz working.

Hello there, if you don't mind which OS and Catalyst version? Thanks. Are u using a second monitor as well?

I've 4850 -> Xonar HDAV -> 1080i plasma (#1 display) and 1080P PJ (#2 display) using 23Hz/30i in 9.7 CCC for my 1080P PJ/1080i plasma. Playing BD without problem using TMT3.

I hear you guys and yes other than playing BD it is not so smooth and color of the desktop is a bit artificial...

Kurisu2 I always thought desktop/blu-ray = full range and limited for dvd. Do you use limited for blu-ray/desktop as well?

Kurisu2,
I don't recall I did set it to "Limited RGB". Will check and report tonight. thanks for the info.

If you're using EVR and this is Vista, Microsoft made an undocumented change that broke black levels on a few video players. In MPC-HC, you can fix it with a pixel shader option.

Yes, the problem will only show up in MPC-HC and EVR (and related apps like MediaPortal with EVR, although the MediaPortal devs have a fix out now), everything else will be fine. Messing with brightness/contrast in the control panel is the wrong way to fix it. I don't understand why enabling the pixel shader option isn't working, it does for me.

Hi Axell,

I'm using Vista home-basic SP1 and Catalyst 8.12

Yes, I use saved Catalyst profiles switched via hot-keys
and also by remote control (Logitech 890>USB-UIRT>EventGhost) to switch between three displays:

primary monitor=Samsung 305T @2560x1600 60hz

theater projector=Epson 1080UB @1920x1080 "23hz"

small Samsung LCD in theater (for music playlists) @1600x1200 60hz (this one is actually connected to my onkyo 876's HDMI Sub output)

I'm using ZoomPlayer for HD video playback (MKV & FLAC), and the ATI 4670 streams the multichannel FLAC perfectly to the Onkyo 876 over a 25 foot HDMI cable (Monoprice).

I love ZoomPlayer's media library feature that allows me to view/select via remote any movie in my collection instantly from a nice looking/easy to read list.
I made "shortcuts" to all of my MKV files and put them all in a single folder so that they all show up in the list at once, very cool.

laggy mouse is gonna happen at 24hz

not fast enough to make it look smooth

fast movie pans have lots of judder too

Too dark? That fixes the problem of things being too light (which many people had). Too dark, you're on your own.

Thx Robo, good old Catalyst? i'm using XP SP3 with Catalyst 9.7. I can not get 24fps no matter what Catalyst ver. on my 1080p plasma. Regarding the sound via hdmi from my Ati card still no joy to use, i'm using optical from mobo to AVR. Maybe i'll try WIN 7 these days. Cheers

Axell,
What make/model 1080p plasma do you have?
I suggest that you first get everything working correctly with the receiver bypassed to be sure it is not part of the problem.

Hi, what i have is a Panasonic TH42PZ800B and DENON 1909. I have perfect 1080p/24 from my blu-ray player (Panasonic DMP-BD35); but i've tried everything!!! in CCC to get 1080p/24 from my ATI HD 4670 - no succes! Maybe i'm missing something somewhere? Cheers, Axell.

You do know that you can setup reclock to automatically change resolution based on your source material and then change back so you don't get the menu and mouse choppiness. There are several different ways to do this. I would look into it.

Thanks for reply; tried reclock - get 24p but bad stuttering, really bad. Looking forward for some more info. Thanks.

Are you trying to play 50Hz material at 24Hz? Something isn't adding up here. First you where talking about laggy mouse cursor. You are going to get a laggy mouse cursor when your refresh is set to 24Hz. The video should look fine.

Reclock automatically changes my refresh back to 60Hz when I am watching 60Hz content or when 24Hz content is no longer playing. So in windows with no movie playing I get 60Hz and when I am watching a 24p film my refresh is changed to 23.976Hz.

HI NSCJ,

Thanks for the tip regarding Reclock, that may prove to be very useful.

p.s. To whom it may concern, I found that my Epson 1080UB projector doesn't actually display 24fps; it accepts 24p
input and converts it to either 48fps (2:2 pulldown) or
60fps (2:3 pulldown?). That may explain why I don't have the mouse lag.

Axell, I remember having choppy 24p playback when outputting at 1920x1080 24hz in CCC, but switching to
1920x1080 23hz in CCC fixed it for me, the Epson reports
it as 23.90hz which is the same that it reports my Panasonic DMP-BD35 at when outputting 24p.

I'm using VMR9 windowed and no hardware acceleration,
I always get tearing and/or messed up color balance with VMR9 renderless or EVR,
but VMR9 windowed is nearly perfect and really beautiful to watch,
to my eyes it's essentially indistinguishable from the stand-alone BD player.

Playback filters in Zoomplayer=
Haali media splitter (source and splitter filter)
CyberLink H.264/AVC Decoder (PDVD7.x)
or WMVideo Decoder DMO (for VC-1)
or CyberLink Video/SP Decoder (PDVD7) (for MPEG2)
(Dscaler with inverse telecine is good for MPEG2 also)
MadFLAC decoder (multichannel FLAC)
AC3Filter (Dolby Digital/DTS/PCM passthrough)

Also, be sure to set your Realtek HD audio manager so that it doesn't downsample/upsample your HD audio output, i.e. normally set it to 24 bit 48khz

I'm using optical toslink for music output which can be configured separately from the HDMI output to output at CD quality 16bit 44.1khz

Yes, I am still using the old Catalyst 8.12, I figure if it ain't broke don't fix it :-) I watched Bolt last night thru the HTPC at about 7 feet wide 2.00:1 aspect, really beautiful, almost 3D in appearance with the Epson's 2:2 pulldown @48fps and the auto-iris engaged on a Carada BW screen.

I've Panny 3K and that was one of the first thing came to my mind. But for some reasons, after I update to latest W7 CCC, I do not have 23Hz option anymore just 24Hz. 23Hz was there prior my w7 CCC update.