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Very familiar. This video is discussed several times on Doom9. The banding is more obvious when it's played. Sometimes a still shot doesn't show it so well. I don't know why.
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The IVTC'd video flickers when in motion, which filter should i use to fix this issue?
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should i use psy-trellis for anime?
Last edited by x264; 21st Apr 2013 at 07:10.
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You can do whatever you want . Try encoding a few samples at the same bitrate and vary the settings of psy-trellis
In general I tend to not use it, or very low amounts - it tends to make edges "noisy". But in a grain or dither retaining situation you usually have to make compromises -
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How do i apply a mask to prevent the dark scene's from being oversmoothed? could any of you post the code for this process?
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See my post and poisondeathray's post immediately after:
https://forum.videohelp.com/threads/355377-Interlacing-problem?p=2235689&viewfull=1#post2235689
That allows you to filter differently based on brightness.
Or you can use Trim() or ApplyRange() to apply different filters to different ranges of frames. -
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Could you name some of the best postprocessing filters?(to be used with TIVTC(clip2="postprocessingfilter")?, also should i set PP=0 when using an external PP filter?
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PP=0 turns it off completely = no post processing . It's often used when tweaking the settings with display=true. You need to adjust the combing threshold for clip2
Have a look at the documentation and instructions for examples on how to tweak the settings
For clip2 , QTGMC.SelectEven() usually gives good results (at least better than the default, when combing is detected) -
I found this in the qtgmc thread
Although I know a number of people use it with success, QTGMC is not really designed for anime. QTGMC relies on identifying the motion from frame to frame. With a film source the frame rate is fairly high and movements between frames are usually small; the detail of film means good matches can often be found. Anime will run at a lower rate, may contain duplicate frames, have stylized/artificial movement, and be hard to track if there is a lack of fine detail. So motion matches on anime can be poor, which will lead to ghosting on the temporal steps of the algorithm (and possible blurring / halo strengthening). The same problems can apply to game captures to a lesser extent. --Vit -
This is true, QTGMC isn't recommended for deblending either for the some of the same reasons like temporal ghosting issues - but it's still commonly used .
Nevertheless, it still produces better results than other filters with clip2 I would say most of the time, even on anime
Of course YMMV and it varies by source, so try some others out if it's not giving the results you want -
So when i set clip2=QTGMC(), the function will replace the combed frames with the deinterlaced frames from QTGMC. When using the clip2 parameter should i set PP=1(find/hint combed frames but don't deinterlace)?
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QTGMC will return too many frames, you need selectodd or even
clip2 only works with higher PP modes, I can't remember which ones, it says in the instructions . But it works with default PP value for sure
It will replace only those which are detected as combed according to the threshold settings (this is why you need to tweak the settings using display=true) -
QTGMC will return too many frames, you need selectodd or even
It will replace only those which are detected as combed according to the threshold settings (this is why you need to tweak the settings using display=true)
5 - motion-adaptive blend deinterlacing
6 - motion-adaptive cubic interpolation deinterlacing
7 - motion-adaptive modified-ela deinterlacing -
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I usually leave it at default (PP=6)
The modes 5-7 do replacement pixels using the mask where combing is detected, not the entire frame , but if you specify clip2, it doesn't matter because the method e.g. blend vs cubic etc... isn't used , instead clip2 is used
But when you don't use clip 2,
PP=5 Blend deinterlaing is bad. It makes everything blurry
PP=6 Cubic. this is almost the same thing as bob(). Leaves aliasing artifacts on orphaned fields, or combing areas
PP=7 Don't know never use it
clip2 -
When using PP > 1 this parameter may be used to specify a clip to take deinterlaced
frames from instead of using one of TFM's inbuilt deinterlacing methods. If PP < 5
then frames will be taken as is from clip2, if PP >= 5 (i.e. using motion adaptation)
then TFM will build the mask as usual and only pixels in moving areas will be taken
from the frames in clip2. Don't specify anything for clip2 to use TFM's internal
deinterlacing. For an example of using clip2 see the clip2_sample_avs.avs file.
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TFM(d2v="C:\Users\Abhijith Nair\Desktop\Death Note\OP\MainMovie\Desktop\VTS_01_1.d2v", slow=2, display=true, clip2=QTGMC(preset="placebo").selecteven( ) ).Tdecimate(mode=1)
this is what i came up with do you think any option needs to be changed?
You said that i tweak some settings using display=true, name those options?Last edited by x264; 22nd Apr 2013 at 10:24.
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Is it safe to use low cthresh values?
Last edited by x264; 22nd Apr 2013 at 10:29.
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It's not detected as combed with the settings you are using. Notice the overlay says "clean frame" . Display will say "combing detected, deinterlaced" or something like that when it applies the PP clip2 . So adjust the comb detection threshold settings until it is detected. Then go back over other sections to make sure there aren't false positives (you don't want to deinterlace "good" sections)
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and what if there are false-positives? how do i prevent qtgmc from deinterlacing the good frames?. I had to lower the cthresh value to 2 so that a combed frame would be deinterlaced, but now the previous good frames are also being deinterlaced.
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