How to get best picture quality

rene.z · 2007-03-20, 07:31

MediaPortal Version: TVE 3
MediaPortal Skin:
Windows Version: XP SP 2
CPU Type: T7200
HDD:
Memory: 1 GB
Motherboard: abit iL-90MV
Motherboard Chipset: Intel 945GT
Motherboard Bios:
Video Card: Intel GMA 950
Video Card Driver:
Sound Card: Intel 945GT
Sound Card AC3:
Sound Card Driver:
1. TV Card: FloppyDTV (on Server!)
1. TV Card Type:
1. TV Card Driver:
2. TV Card: KNC 1 (on Server!)
2. TV Card Type:
2. TV Card Driver:
3. TV Card:
3. TV Card Type:
3. TV Card Driver:
4. TV Card:
4. TV Card Type:
4. TV Card Driver:
MPEG2 Video Codec: PureVideo
MPEG2 Audio Codec:
Satelite/CableTV Provider:
HTPC Case:
Cooling:
Power Supply:
Remote:
TV: HD LCD TV 1080p
TV - HTPC Connection: VGA (without overscan)

Hi guys!

Since my network setup started to stabilize I was "playing" around with optimizing picture quality in MyTV on the last weekend and have to admit that I am sort of "stuck" at the moment.

There are basically two sets of questions that arose during the weekend:

1.) When using "only" a decoder (say PureVideo or MPV) I do get around 50 FPS (as shown by Shift-1). The picture quality is OK as long as there is no quick movements within the picture. However, as soon as there is ANY faster movement I do get A LOT of block artifacts and something that looks like tearing to me.

It looks to me as if the CPU would not be fast enough to decode and scale the content properly (which I don’t think is true because the CPU load is around 10-15%)

Anybody any idea what's happening here?

2.) As soon as I add ffdshow as a postprocessor to the graph the frame rate (as shown by Shift-1) drops to 25 FPS... WHY? (CPU at around 40-50%)

I would love to optimize my picture quality... so any help/hints on the above two topics is highly appreciated!

CommGuru · 2007-03-20, 22:48

I would question the umpf of your video card before anything else. No matter how beefy your cpu is, if your vid card can't keep up you will get those type of artifacts. I 1st noticed this on a machine I built that used the same video card although a different chipset. (965G) After upgrading the video card and enabling hardware accelleration with PureVideo, I never get the slow down and sub-par video quality.

CG

2007-03-20, 07:31	#1 (permalink)
rene.z Portal Member Join Date: Jan 2007 Posts: 6 Thanks: 0 Thanked 0 Times in 0 Posts Country:	How to get best picture quality MediaPortal Version: TVE 3 MediaPortal Skin: Windows Version: XP SP 2 CPU Type: T7200 HDD: Memory: 1 GB Motherboard: abit iL-90MV Motherboard Chipset: Intel 945GT Motherboard Bios: Video Card: Intel GMA 950 Video Card Driver: Sound Card: Intel 945GT Sound Card AC3: Sound Card Driver: 1. TV Card: FloppyDTV (on Server!) 1. TV Card Type: 1. TV Card Driver: 2. TV Card: KNC 1 (on Server!) 2. TV Card Type: 2. TV Card Driver: 3. TV Card: 3. TV Card Type: 3. TV Card Driver: 4. TV Card: 4. TV Card Type: 4. TV Card Driver: MPEG2 Video Codec: PureVideo MPEG2 Audio Codec: Satelite/CableTV Provider: HTPC Case: Cooling: Power Supply: Remote: TV: HD LCD TV 1080p TV - HTPC Connection: VGA (without overscan) Hi guys! Since my network setup started to stabilize I was "playing" around with optimizing picture quality in MyTV on the last weekend and have to admit that I am sort of "stuck" at the moment. There are basically two sets of questions that arose during the weekend: 1.) When using "only" a decoder (say PureVideo or MPV) I do get around 50 FPS (as shown by Shift-1). The picture quality is OK as long as there is no quick movements within the picture. However, as soon as there is ANY faster movement I do get A LOT of block artifacts and something that looks like tearing to me. It looks to me as if the CPU would not be fast enough to decode and scale the content properly (which I don’t think is true because the CPU load is around 10-15%) Anybody any idea what's happening here? 2.) As soon as I add ffdshow as a postprocessor to the graph the frame rate (as shown by Shift-1) drops to 25 FPS... WHY? (CPU at around 40-50%) I would love to optimize my picture quality... so any help/hints on the above two topics is highly appreciated!

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2007-03-20, 22:48	#2 (permalink)
CommGuru Portal Member Join Date: Oct 2006 Age: 31 Posts: 51 Thanks: 1 Thanked 0 Times in 0 Posts	I would question the umpf of your video card before anything else. No matter how beefy your cpu is, if your vid card can't keep up you will get those type of artifacts. I 1st noticed this on a machine I built that used the same video card although a different chipset. (965G) After upgrading the video card and enabling hardware accelleration with PureVideo, I never get the slow down and sub-par video quality. CG