Disable deinterlacing?

[InTheFlow]

Originally Posted by kenb

i looked at the vids on another machine where they combed badly on the crt.
kenb

Would someone be willing to post a pic or a link to a pic of what combing looks like? I'd love to know if that is what I'm seeing on my PC monitor when watching a recorded TV show.

Thanks!

[stanger89]

http://www.hometheaterhifi.com/volum...e-10-2000.html

[nielm]

also, www.100fps.com

[InTheFlow]

Thanks, those are great articles. I'll finish reading them this evening but from what I've seen so far, it looks like I have interlacing issues.

I love learning new stuff!

[brainbone]

After searching the forums and not finding much but this thread on the subject, I thought I'd pop in and share what I've come up with so far for getting around quality degradation of outputting interlaced material to an interlaced display (PC connected to TV via an Svideo cable).

First; Download and install:
1) Windows Decoder Checkup Utility
http://www.microsoft.com/downloads/d...displaylang=en

2) Media Player Classic
http://sourceforge.net/project/showf...ckage_id=84358

3) MPV and MPA video/audio decoders
http://sourceforge.net/project/showf...ease_id=400406
http://sourceforge.net/project/showf...ease_id=400407
install these by unzipping and copying MpaDecFilter.ax and Mpeg2DecFilter.ax to \windows\system32, then start -> run
regsvr32 \windows\system32\Mpeg2DecFilter.ax
and
regsvr32 \windows\system32\MpaDecFilter.ax

The next step is to disable underscanning and turn any "flicker filter" off in your video drivers, then reduce your resolution to 720x480 or 640x480 at 60hz (for NTSC, 50hz for PAL) (on Nvidia cards, use 720x480). The location of these settings vary from driver to driver, but the most recent drivers from both Nvidia and ATI as of this posting date do have these abilities.

Now, run the "Microsoft Windows XP Video Decoder Checkup Utility", select the "MPV Decoder Filter", and click "Select Prefered".

Now, open any Mpeg2 file with media player classic. While the video is playing, in mplayer2 select Play->Filters->Mpeg2 Video Decoder

In the Settings tab, select "Bob" for deinterlacing.
Click "OK". Quit mplayer.

Open SageTV
In, Setup->Detailed Setup->Video/Audio/Mpeg2 Video Decoder Filters, select "Default".

Try playing some interlaced TV.


What's happening?
The "BOB" deinterlaced in MPV doubles the frame rate from 30fps to 60fps, breaking the two interlaced fields in a single frame into two frames. When played back at 60FPS on a 30FPS (60 fields per second) interlaced display like a TV, we get close to the same results as if the video was never de-interlaced in the first place. Pause the video, and you'll see a single field from the interlaced video. Hit play, and you'll see the fields blend together as one, just as they should.

This is the way "BOB" deinterlacing should work in other decoders, but for some reason when output back to an interlaced display with other decoders (Cyberlink, Intervideo, Nvidia Pure Video, what-have-you), it just dosn't work as expected. MPV, however, does seem to give reasonable results.

Downfall:
- CPU use is high.
- MPV doesn’t play well with WMP10.
- I've only just started testing SageTV, so I can't say how stable this solution is.
- This solution seems to work in other applications better than SageTV. SageTV appears to slightly scale a 480i image above or below 480 lines, causing increased flickering in areas where there should be none. The same video played in Media Player classic, for example, appears better… though it could just be that I’ve been staring at the screen too long, looking for de-interlacing artifacts.

If anyone else has a better solution I'm not aware of, please share.