1080i material not deinterlacing under 1.0.1.0 (1 Viewer)

[kkozma]

What kind of scaling issues?

 

[globaldonkey]

Well, I had a Samsung 42" that I was trying to hook it up to via HDMI. It's native resolution was 1024 x 768 which is 4:3 AR and just looked ridiculous on a screen that really has 16:9 dimensions. Don't know why you would offer that sort of native resolution (as the only option) on a widescreen display..... beats me, probably has something to do with the price tag. The playback was fine at this resolution (no jitter / drop, smooth image across all formats), but nice and squished, as you could imagine. So I tried using 1280 x 720 which fixed the AR but resulted in overscan that needed scaling. As soon as I did this, the jitter was terrible, indicating some sort of performance problem. And it was across all formats - 720p, 1080p, 576i, 1080i. Tried enabling and disabling GPU scaling in Catalyst, but no difference, and GPU utilisation remained the same at around 20% in both cases (which is why I think its a driver / config problem). It looked to me like scaling on the GPU wasn't working at all, and it was probably the CPU trying to do the scaling. Was running CCC 9.5. I resolved it by getting the TV to do the scaling.

 

[pilehave]

Well, I had a Samsung 42" that I was trying to hook it up to via HDMI. It's native resolution was 1024 x 768 which is 4:3 AR and just looked ridiculous on a screen that really has 16:9 dimensions. Don't know why you would offer that sort of native resolution (as the only option) on a widescreen display..... beats me, probably has something to do with the price tag. The playback was fine at this resolution (no jitter / drop, smooth image across all formats), but nice and squished, as you could imagine. So I tried using 1280 x 720 which fixed the AR but resulted in overscan that needed scaling. As soon as I did this, the jitter was terrible, indicating some sort of performance problem. And it was across all formats - 720p, 1080p, 576i, 1080i. Tried enabling and disabling GPU scaling in Catalyst, but no difference, and GPU utilisation remained the same at around 20% in both cases (which is why I think its a driver / config problem). It looked to me like scaling on the GPU wasn't working at all, and it was probably the CPU trying to do the scaling. Was running CCC 9.5. I resolved it by getting the TV to do the scaling.

I would put my output back to 1024x768 and use the built-in scaling option in MP to rescale the image to fit. You'll find it in the GUI calibration (within MediaPortal).

I do this on my 42" LG plasma (also 1024x768 / 16:9). Almost every 42" plasma (that is not FullHD) is built with rectangular pixel to allow 1024x768 to fit. I get really nice 1:1 pixelmapping and good scaling with these settings. 1280x720 gives overscan, ugly textures etc.

 

[globaldonkey]

Thanks for the tip pilehave. Will give that a go. I can live with the desktop looking squished, so long as MP and movies are correct AR.

 

[weissollo]

@ ANDREW H

If it were me I'd replace the entire system.

for your answer, I will cope with 1.0.0 as long as possible and maybe buy a new HTPC later.

 

[RCW]

I've read this entire thread and done some testing and MP must have an issue with interlaced content.
Hardware:
Intel E8500
9300 GPU on board

In Australia most of our free to air HD TV is a simucast of SD. Did a test on live TV.
Same channel content (SBS) HD-720p ~50fps, SD-576i~25fps.
720p looks great, 576i looks crap.

How can inadequate hardware make HD look better than SD?
It cant.
Its not a hardware issue as tourettes post #54 (https://forum.team-mediaportal.com/...-under-1-0-1-0-a-58486/index6.html#post422879) in this thread states.

I've checked CPU & GPU usage - they are idling....

There is a bigger issue here than 1080i, its all interlaced content.

 

[globaldonkey]

Define "looks crap". Stutters? Jaggies? Hardware can definitely play a big part in the quality and performance of de-interlacing.

 

[RCW]

The picture quality is far inferior to that of the same 576i channel provided by my pay TV provider direct from providers box to TV.
I fail to see how my hardware could not produce a decent 576i output.

 

[Owlsroost]

I've read this entire thread and done some testing and MP must have an issue with interlaced content.
Hardware:
Intel E8500
9300 GPU on board

In Australia most of our free to air HD TV is a simucast of SD. Did a test on live TV.
Same channel content (SBS) HD-720p ~50fps, SD-576i~25fps.
720p looks great, 576i looks crap.

How can inadequate hardware make HD look better than SD?
It cant.
Its not a hardware issue as tourettes post #54 (https://forum.team-mediaportal.com/...-under-1-0-1-0-a-58486/index6.html#post422879) in this thread states.

I've checked CPU & GPU usage - they are idling....

There is a bigger issue here than 1080i, its all interlaced content.

According to your system specs, you have FFDshow selected as the MPEG2 decoder - MP blocks this for live TV, so it may be using the MPC-MPV codec for SD TV which doesn't support hardware de-interlacing (use Graphstudio to check when playing live TV). Use a codec which supports HW de-interlacing e.g. PowerDVD and it should look a whole lot better.

(I'm assuming here that SD TV in Australia is MPEG2)

Tony

 

[Andrew H]

The picture quality is far inferior to that of the same 576i channel provided by my pay TV provider direct from providers box to TV.
I fail to see how my hardware could not produce a decent 576i output.

So you're comparing the picture quality of your TV provider's box to that of your HVR-2200 via MediaPortal, right? My first question would be WHY would you care when you can receive the same broadcast in 720p which you said: looks great. Keep in mind, cable-TV doesn't limit themselves to broadcast standards... your HVR-2200 does.

IF, on the other hand, your issue is related to image smoothness (using the <Shift><1> to obtain your framerate) on your SD broadcast we understand: it's not a function of overall resolution, instead it's because MP is now writing video via TEXTURES (which is GPU intensive) and YES, you may be 100% correct that this issue isn't relative only to 1080i, but any interlaced video.

As the last poster indicated, not being from Austrailia we are not familiar with your broadcast standards. Can you educate us and say whether the 576i you're referring to is an analog or digital signal? In the US (after years of transition) we just switched (June 2009) from analog (NTSC ~480i) to digital (ATSC 720p or 1080i)... only those tuning analog from a cable providers cable (or 'low-power' OTA broadcasters) still have any use for an analog tuner.

Seeing you have the Hauppauge HVR-2200 card... I must direct you to another thread where we're trying to assist with separating the display judder you're seeing on interlaced material from reception issues and possibly encoding issues associated with the HVR-2200 you're using, and/or whether MP has degraded something with their 1.0.0.0 release (as it applies to Hauppauge on-board hardware encoded MPEG-2 analog video broadcasts).

I do question your using the HVR-2200 under WinXP when the literature states: "The HVR2200 comes complete with Windows XP MCE and Windows Vista Home Premium and Ultimate (32 and 64Bit) WHQL drivers..." Although I did locate this driver Version: 7.6.1.27086 for WinXP. I also stumbled across this article addressing the HVR-2200's analog tuner under MP which may be totally related to Hauppauge's driver.

The thread you're reading is focusing on INTERLACED display issues.