14 replies to this topic

[mawhite]

Have been happily running MP (current version 1.2.3) for a while now and works fine. My gripe is generally when watching the 1080i channels like 7mate, GEM and One. Will often see interlacing being quite obvious. I run MP with MS codec for TV via an Acer nettop dual core Atom ION. Runs fine. All fed via a Samsung LCD via HDMI. Output in nVidia control panel is either 1080p or 720p.

I have managed to get rid of the interlacing effect by installing and running LAV filters and forcing deinterlacing. This fixed the problem bu then the smoothness of the video (mainly for fast panning) is not as great as the MS codec. The option in LAV is for 25/30p or 50/60p but if I choose 50p I get very strong stutter.

I can clearly get rid of the interlacing by forcing de-interlace and using Bob or Weave (not adaptive) but am restricted to 25p output. Not sure why I see this interlacing using MS codec......ffdshow is too hard to get working as well. Why do SD FTA stations broadcasting in 576i not see this effect?

Will have to play around some more but anyone got any thoughts on why I am seeing this interlacing effect and how to resolve. If you need more info will post that up too.

thanks

Edited by mawhite, 29 July 2012 - 09:54 PM.

[logifuse]

Deinterlacing is fine on my IONs. The MS Decoder does hardware deinterlacing (i.e. GPU), so it should be down to the graphics drivers.

Have you set something in Fallback de-interlace mode in the MP settings? I've read stories where changing that from none causes problems, but then I've read that it fixes things for others.

IONs aren't really powerful enough for any software deinterlacing, so don't enable YADIF in LAV. I find that IONs are borderline for LAVs CUDA option, so I use DXVA(Native).

Oh, & you should never enable inverse telecine in the Nvidia CP for Aussie use (unless you have NTSC DVDs).

Justin

[mawhite]

Deinterlacing is fine on my IONs. The MS Decoder does hardware deinterlacing (i.e. GPU), so it should be down to the graphics drivers.

Have you set something in Fallback de-interlace mode in the MP settings? I've read stories where changing that from none causes problems, but then I've read that it fixes things for others.

IONs aren't really powerful enough for any software deinterlacing, so don't enable YADIF in LAV. I find that IONs are borderline for LAVs CUDA option, so I use DXVA(Native).

Oh, & you should never enable inverse telecine in the Nvidia CP for Aussie use (unless you have NTSC DVDs).

Justin

Thanks will have a play later. I am pretty sure I tried all possible combo's in LAV and the current config was the only one that worked.

[mawhite]

Ok spent about 3 hours on this last night. The only way to eliminate the interlacing artifacts in is running LAV and specifying CUVID and 25/30p output. As mentioned however this gives 25p to all the TV broadcast which for fast moving stuff is not ideal.

I know for a fact that deinterlacing is working with MS and LAV when I just leave things along as:

1)With MS and LAV I get no issues with 576i stations
2)I only get on HD channels on occasions (like watching GEM and the Olypmics broadcasts)
3) If I disable deinterlacing in LAV (there's an option in there for that) I see the interlacing lines noticeably on 576i channels and even alot worse on GEM for instance

I think that the ION's deinterlacer is not the best as in my outcome it must struggle on some HD materials.

Thoughts- I have my nVidia control panel outputting a progressive signal to the panel. I read in some places that if I change to output an interlaced signal the panel's deinterlacer will take over. If this is the case this poses additional problems being: All the interlaced outputs only offer me a 25/30Hz refresh rate. As I run the MP auto-refresh changer for varied video framerate content this doesn't then work as the necessary Hz is not available and I get framerate stutter in anything other than 50/60hz content.

I am planning on updating the panel at some stage as it's only a HD panel and is 4 years old to a full HD one - perhaps this then will permit additional refresh rates....

Edited by mawhite, 30 July 2012 - 05:43 PM.

[logifuse]

Yeah, the deinterlacing of the ION isn't the best, but it should be OK on a 720p panel (that's what my bedroom TV is). Have you tried WMC on the same machine? Same results?

What Nvidia drivers are you using? I think I'm running reasonably old drivers on mine (to fix a specific 59/60Hz issue). Might even be 257/258 or so.

Edit: Sorry, forgot to discuss the progressive vs interlaced output - it's not the fix you assume it might be because the input video isn't untouched. For interlaced output, it's deinterlaced, OSD graphics are added (when called on), resized, & then the overall output is interlaced.

Justin

[logifuse]

Also, you need to edit the refreshrate changer options to suit the outputs you can handle. For example, you may normally output 50Hz 1280x720 with resize, make sure you also set up 59Hz (59.94) with the same settings in Nvidia CP (with identical resize). Then go & edit the refresh rate settings in MP so that 23.976/29.97 switches to 59.

Justin

[mawhite]

Yeah, the deinterlacing of the ION isn't the best, but it should be OK on a 720p panel (that's what my bedroom TV is). Have you tried WMC on the same machine? Same results?

What Nvidia drivers are you using? I think I'm running reasonably old drivers on mine (to fix a specific 59/60Hz issue). Might even be 257/258 or so.

Edit: Sorry, forgot to discuss the progressive vs interlaced output - it's not the fix you assume it might be because the input video isn't untouched. For interlaced output, it's deinterlaced, OSD graphics are added (when called on), resized, & then the overall output is interlaced.

Justin

I don't recall seeing on WMC before moving over but it may have been there to be honest. You may recall my experience with WMC was plagued by a periodic stutter issue that resolved on move to MP. I was using 280 but updated last night too 300+ (whatever it is).

Do you wanna have a close look at GEM tonite and see if you see interlace line on fast moving stuff. My wife wouldn't know any better so it's just me.

[logifuse]

Might be able to check it out this arvo (London Gold show) - home with a sick little miss.

Justin

[mawhite]

Also, you need to edit the refreshrate changer options to suit the outputs you can handle. For example, you may normally output 50Hz 1280x720 with resize, make sure you also set up 59Hz (59.94) with the same settings in Nvidia CP (with identical resize). Then go & edit the refresh rate settings in MP so that 23.976/29.97 switches to 59.

Justin

All this currently works fine. The problem was going to be selecting an interlaced output and only have 25 or 30hz to play with. Wouldn't work.

[mawhite]

Might be able to check it out this arvo (London Gold show) - home with a sick little miss.

Justin

Thanks. I might record some snippets and post up to a site somewhere so you can get a sense of what I am talking about.

[logifuse]

OK, just tuned in to the Mark "smashing baby" Nicholas show & watched some equestrian. I was sitting on the end of the bed about 4-5 feet away & couldn't see any interlace lines or any signs it wasn't being deinterlaced properly. Was quite a nice picture actually (I've been watching the olympics on Foxtel).

I'll have to dig out a KB & mouse to check my settings in NCP & MP config. Not sure which decoder I'm using. Guessing LAV from the PQ.

Justin

[mawhite]

OK, just tuned in to the Mark "smashing baby" Nicholas show & watched some equestrian. I was sitting on the end of the bed about 4-5 feet away & couldn't see any interlace lines or any signs it wasn't being deinterlaced properly. Was quite a nice picture actually (I've been watching the olympics on Foxtel).

I'll have to dig out a KB & mouse to check my settings in NCP & MP config. Not sure which decoder I'm using. Guessing LAV from the PQ.

Justin

Ok will post some clips if the recording also shows this. If it doesn't it's clearly a panel issue.

[logifuse]

Nvidia version 261.28. My other settings:

 NCP video settings.JPG   93.89K   9 downloads
 MPC Codecs.JPG   77.21K   9 downloads
 MPC TV.JPG   60.75K   9 downloads
 LAV.JPG   75.69K   6 downloads

Fair to say it's not as good as my main system's HD6570, but it's pretty good.

Justin

[mawhite]

OK, just tuned in to the Mark "smashing baby" Nicholas show & watched some equestrian. I was sitting on the end of the bed about 4-5 feet away & couldn't see any interlace lines or any signs it wasn't being deinterlaced properly. Was quite a nice picture actually (I've been watching the olympics on Foxtel).

I'll have to dig out a KB & mouse to check my settings in NCP & MP config. Not sure which decoder I'm using. Guessing LAV from the PQ.

Justin

Ok this is the latest. I recorded some GEM footage in MP. Dropped to the desktop and watched it via WMP - same result. I then copied over the network to the desktop which has a nVidia 8600GT (same driver version and same settings) and it looks clean.

So thoughts then are:

- ION not that crash-hot (despite yours looking ok)
- Panel related

From a distance of say 3.5 to 4m you can't see it it's only when up say .5m to the set. I know you mentioned you sat prob a couple of metres away - any change if you site closer?

I did also find that the MPC-MPEG2 decoder almost eliminates this issue but again adds a slightly unusual 'film like' effect i.e. not as smooth as MS and LAV. With all the playing around with codecs etc I no longer seem to have the MPC-MPEG2 decoder and wouldn't mind getting it back do you know how?

cheers
Michael

[logifuse]

While I watching 1-1.5m away (I shouldn't have used feet earlier), I was doing plenty of leaning in closer - it didn't make any difference.

Might be worth seeing how XBMC runs (as it has its own codecs): http://www.scintilla...c/prebuild.html when you start viewing, you need to right click & set the deinterlacing & DXVA settings & scroll down to save them.

Not sure how to get the MPC-MPEG2 decoder back - you should be able to fix the .ax file & re-register it.

Justin