VideoHelp Forum
+ Reply to Thread
Results 1 to 13 of 13
Thread
  1. Short Clip Sample. The interlacing looks really bad near the end of the hold. The clip is from a VHS to DVD conversion I demuxed to an MPEG2. It's 720 x 480.

    As far as I know the only way to remove interlacing artefacts is to convert to progressive. Is that correct? And when you do so you lose detail and you get slowdown so I don't want to do that.

    So I just want to remove the interlacing artefacts but keep the video as interlaced and I don't want to lower the resolution of the video or lower the quality of the video. The video is for viewing on a TV.

    Is there any way to do that?
    Quote Quote  
  2. Banned
    Join Date: Oct 2004
    Location: New York, US
    Search Comp PM
    -30-
    Last edited by sanlyn; 22nd Mar 2014 at 04:27.
    Quote Quote  
  3. OK is this code correct? Should I degrain while in progressive? Also I can still see some interlacing, how could I remove more or all of it?

    Code:
    Mpeg2Source("H:\New\z = Encode\Original few secs.d2v", CPU=6)
    ConvertToYV12(interlaced=true)
    
    AssumeTFF() # or AssumeBFF() depending on the source
    
    # deinterlace
    Load_Stdcall_plugin("C:\Program Files\AviSynth 2.5\plugins\yadif.dll")
    QTGMC(Preset="Ultra Fast") 
    
    DeGrainMedian(limitY=2, limitUV=3, mode=1, interlaced=true)
    
    SeparateFields()
    SelectEvery(4,0,3)
    Weave()
    Quote Quote  
  4. Originally Posted by holygamer View Post
    As far as I know the only way to remove interlacing artefacts is to convert to progressive. Is that correct?
    That's like asking if there's any way to cut your arm off without cutting your arm off. The video is either interlaced (with comb artifacts) or it's progressive (without comb artifacts).


    Originally Posted by holygamer View Post
    And when you do so you lose detail and you get slowdown so I don't want to do that.
    You can make it 30 fps progressive or 60 fps progressive. The former will be a little jerky/flickery because it has only half the temporal resolution. The latter has all the temporal resolution but isn't DVD compatible.
    Quote Quote  
  5. I'm making a Bluray disc. So if I make it 60 fps will that get rid of all the interlacing artefacts or do I also need to use QTGMC? Will the quality still be good or do I lose quality making it progressive?
    Quote Quote  
  6. Originally Posted by holygamer View Post
    I'm making a Bluray disc. So if I make it 60 fps will that get rid of all the interlacing artefacts or do I also need to use QTGMC? Will the quality still be good or do I lose quality making it progressive?
    You can either leave it interlaced and let the TV deinterlace while you watch it, or you can deinterlace it before encoding. Which looks better depends on how good your TVs deinterlacer is, how good you deinterlace, and how well you encode it. The reason it's often recommended to leave interlaced video interlaced is that if you deinterlace it you will be stuck with whatever artifacts your deinterlacing produces. Your deinterlaced video will never get any better. If you leave it interlaced, the video quality will improve with the deinterlacing abilities of future TVs. But it will be a long time before any TV can deinterlace better than QTGMC.

    I don't think 60 fps 720x480 is Blu-ray compatible. Though some players may play it.

    I would use QTGMC() to make it 60p (or 30p, ie, followed by SelectEven() or SelectOdd()). If that's too slow Yadif(mode=1, order=1) might look ok, though it will have problems with thin horizontal lines like the ropes. Even a Simple Bob() will work.
    Last edited by jagabo; 17th Jun 2012 at 09:58.
    Quote Quote  
  7. Banned
    Join Date: Oct 2004
    Location: New York, US
    Search Comp PM
    -30-
    Last edited by sanlyn; 22nd Mar 2014 at 04:28.
    Quote Quote  
  8. Member
    Join Date: Oct 2010
    Location: England
    Search Comp PM
    Originally Posted by sanlyn View Post
    Interlaced video played on a PC will always look interlaced, but not on TV. If you want to play interlaced mpg on a PC, try VLC Player (you have to manually tell VLC to deinterlace. Pain in the neck).
    VLC should automatically deinterlace interlaced video - if it isn't, check the preferences.

    If it's still not working, maybe your video isn't flagged as interlaced (mediainfo?).
    Quote Quote  
  9. Banned
    Join Date: Oct 2004
    Location: New York, US
    Search Comp PM
    -30-
    Last edited by sanlyn; 22nd Mar 2014 at 04:28.
    Quote Quote  
  10. Member themaster1's Avatar
    Join Date: Nov 2006
    Location: France
    Search Comp PM
    @holygamer
    I've tweaked your video today. I've watched old 90's wwf on YT to see how they looked like i think i'm not far off. How is the guy called with the hannibal lecter mask ?

    script
    http://www.mediafire.com/?wpz43y1nud71cfi
    Attached Thumbnails Click image for larger version

Name:	new.jpg
Views:	89
Size:	230.4 KB
ID:	12796  

    Click image for larger version

Name:	original.jpg
Views:	80
Size:	280.3 KB
ID:	12797  

    Quote Quote  
  11. Banned
    Join Date: Oct 2004
    Location: New York, US
    Search Comp PM
    -30-
    Last edited by sanlyn; 22nd Mar 2014 at 04:29.
    Quote Quote  
  12. Member themaster1's Avatar
    Join Date: Nov 2006
    Location: France
    Search Comp PM
    I guess every one is entitled to his opinion for me the spotlights should be yellow , the ground white/light(very light) cyan and the skin have some pink as they're all caucasians.

    In any case this is what i propose now:

    I have used mvtools+sharpened + neat + added some grain. I recognize i have sharpened UV with neat to about 150/250% in the mid-lows (lol) probably way too much. Sony vegas vscope seem to appreciate the refinements and my eyes aswell so i'm offcially done with it.

    http://www.mediafire.com/?3x860p1x9mczldv


    comparison:
    original (mpg)/ sanlyn (mpg)/ themaster1 (mpg)
    Attached Thumbnails Click image for larger version

Name:	comparison.jpg
Views:	127
Size:	685.7 KB
ID:	12839  

    Quote Quote  
  13. Banned
    Join Date: Oct 2004
    Location: New York, US
    Search Comp PM
    -30-
    Last edited by sanlyn; 22nd Mar 2014 at 04:29.
    Quote Quote  



Similar Threads