1080i material not deinterlacing under 1.0.1.0 (1 Viewer)

[kiwijunglist]

I think this is definitely relevant to bring this up. Not many users have 1080i H264 TV broadcasts, so I think it's important that the developers know that the new changes have introduced problems for some users. I imagine only a small proportion of developers watch 1080i H264 DVB-T using XP + hardware acceleration. As an end user I am unsure of the changes to the code, but want to make the developers aware just in case the changes have introduced a bug vs increased hardware requirements for more power hungry rendering.

[[*] AMD 780G: with Athlon X2 it manages to do _some_ 1080i content properly - seems to be right on the edge. No problems with any Phenom (HT3 CPU). If there's stuttering, you might be able to workaround it with CoreAVC, another version of PDVD codecs or live with Bob deinterlacing.

I would say that with the improvements MP 1.0.2 + 780G +Athlon X2 + XP + PDVD8 (Hardware Accleration) + 1080i TV + bob deinterlacing is definitely now off the edge. I havn't retried MP1.0.2 since I overlclocked the FSB. However I am not complaining, It is good that the flicker issue for vista has been solved/improved.

780G + Athlon X2 + XP (I can't vouch for vista) unfortunately now fails requirements for 1080i TV

I am happy with MP1.0 Final, and will probably install a new video card along with more HDDs when 1.10 is released.

 

[dale77]

780G + Athlon X2 + XP (I can't vouch for vista) unfortunately now fails requirements for 1080i TV

1080i TV on 780G + X2 + Vista works fine for me, only the very occasional stutter which I put down to signal issues.

This is for TV3 in NZ.

Nice to see you here kiwijunglist....

 

[kkozma]

Another note: Several team members confirmed that a nicely working rig with PDVD codecs might just fail to do proper deinterlacing at some point (not related to a specific time frame). We didn't find out the true cause of it yet but guess it's cyberlink's fault. Rebooting the machine cures that situation.

Thank you for this little bit of info. I did happen to notice that after a fresh reboot it took quite some time for this jitter to come back, but it eventually did. Sometimes it would last 30 minutes before it happened and sometimes it could be as quickly as 5 minutes. I switched my television MPEG-2 codec to the MPC codec and now it works perfectly.

I also went through all of my ATI CCC settings and found a few default settings that could have been attributing to this issue on my machine.

Denoise was enabled
V-sync was disabled
Also, not sure if it did anything , but I enabled tripple buffering in the 3D tab

I'll keep an eye on this to see if it does infact stay fixed and will report back if it does.

 

[Owlsroost]

A couple of thoughts...(partly sparked off by the info in rtv's latest post - thanks for that)

1. Given the importance of video card performance to smooth operation of MP (especially with interlaced HD content), would it be a good idea to start a forum thread to gather video card performance info with MP(and yes, I'm volunteering to start it ) ? Should it go in the 'MediaPortal 1' area or the 'HTPC Hard/Software' area ?

2. Do the various 3D performance/quality settings that both ATi and nVidia control panels have make any difference to performance under MP ? (I've never noticed any difference myself).

Tony

 

[kiwijunglist]

dale77

Press shift+! watch TV3, tell me what the fps rate is, it should stay between 49.5 and 50.5 (ignore avg fps), also tell me what % of total frames are dropped and what the jitter is. PS - I'm not sure if shift+! works in evr or not.

 

[globaldonkey]

Owlsroost That sounds like a great idea. It's quite confusing trying to work out what a good GPU / CPU combination is for doing h.264 1080i, and other "lesser" formats (performance wise). It would be good to match the hardware against what material the config should be able to handle.

It's not just TV you've got to look at with performance. Many of the HD camcorders do h.264 1080i as well.

Here's a link I found a while back. Might be a bit dated now. Could be used as a starting point.

Missing Remote

 

[Andrew H]

WOW -- My hat's off to globaldonkey for pointing to the Missing Remote article! It's quite comprehensive and sheds light on which video chipsets do what and how well. THANKS!

 

[jbf154]

I noticed both with VMR9 and EVR, I am only getting 30 fps with 1080i (h264) content, but with 720p I get 60 fps. I've tried various codecs and deinterlace methods, but can't get it to 60 fps w/ 1080i.

Anyone else have the same problem?

 

[Andrew H]

YES, Yes, yes... that's exactly what we've been diagnosing/discussing. I can't say about the .264 but since 720p content is progressive it doesn't exhibit the dropped frames/judder the 1080i content does... Read the Missing Remote link and tell us what video card you're running. BTW, usually .264 content is at 24p, and your being in the USA I'd say your 1080i should be ATSC 30 frames-interlaced (e.g. CBS, PBS, NBC, & CW).

 

[jbf154]

Hi Andrew. I am running nVidia 7050PV. The reason I bring it up is b/c if I watch the direct source of 1080i content on my TV, it looks smoother (i.e. sports display this the best). On my HTPC, it looks like it is running at a film frame rate (24 fps). Really no jitter, but the same smoothness isn't there. 720p is perfect except it isn't as crisp on the 1080i sources (CBS, NBC, etc.)

I know my integrated graphics isn't the best, but I don't have room to expand with a graphics card. I only have a PCI express v1 slot and some regular PCI slots available (microATX board).

I appreciate everyone's help.