Deinterlacing Question

[hizzy7]

Hi!

Would this be an interlacing issue? Do me, it's telecined, but I don't recognize the pattern.

http://files.videohelp.com/u/183506/kfkid.demuxed.m2v

Do you have a script you would recommend for this one?

Thank you again, video kings!

h

[manono]

It's standard PAL2NTSC field-blended garbage.

Yadif(Mode=1)#or the better QTGMC
Srestore()

[hizzy7]

Hi Video Masters!

I have this video and I wanted to check my workflow with you to see if I have it right, which I think/hope I do!

http://files.videohelp.com/u/183506/revenge.demuxed%20(2).m2v

This video is a PAL to NTSC screwup. This is my script to fix it:

Mpeg2Source("AudioFile_80.ac3.d2v")
AssumeTFF().QTGMC(Preset="placebo")
sRestore()
AssumeFPS(23.976)

The frame size is NTSC, so there is no need to re-size it. sRestore will fix the bad conversion, and from there I chose to slow it to film speed and use besweet to slow the audio to film speed. I will later encode with flags so that it plays at 29.97.

I hope I have understood everything correctly!

Thank you again for your instructions

h

[jagabo]

That looks ok. QTGMC(Preset="placebo") is overkill though.

[hizzy7]

Hi,

I have a question. I am applying the above script to the video, but I find there are still some slight motion artifacts. Here is another unadulterated clip from the same video:

http://files.videohelp.com/u/183506/revenge2.m2v

If people could apply the script above and give me an opinion on the resulting video, that would be wonderful. Do you think what I have noticed is "chroma bleed"?

Many Thanks!

h

[manono]

AssumeFPS(23.976)

And you'll also be slowing the audio to match, right?

I am applying the above script to the video, but I find there are still some slight motion artifacts.

If you're talking about the aliasing/line jitter, it's mostly caused by the idiots that made the DVD making a widescreen film 4:3 rather than 16:9. There's not enough resolution to resolve fine lines. I usually fix something like this with this (after unblending and making progressive):

QTGMC(InputType=1)#or 2 or 3, depending on what it takes and how smoothed you want to let the movie get

It's explained in the QTGMC doc under '7. Progressive Input'.

[hizzy7]

Hi manono!

Right now, I am making a lagarith avi. Would I apply that scrip to my AVI after unblending?

Thanks!

[manono]

Yes, after the unblending. But you may not be able to run two instances of QTGMC in the same script. You might have to run the second QTGMC in a separate operation. Or bob with something else initially.

[jagabo]

I thought this worked pretty well:

Mpeg2Source("D:\Downloads\revenge2.d2v", CPU=2, Info=3) 
Crop(4,48,-12,-48)
AssumeTFF()
Interleave(TFM(field=1), TFM(field=0)) # bob
vInverse() # clean up a little residual combing
SRestore() # back to 25 fps
ColorYUV(off_y=-14, cont_u=100, cont_V=100) # drop black level, increase color saturation
MergeChroma(aWarpSharp(depth=20)) # sharpen colors
Stab() # debounce
Crop(2,2,-2,-2) # remove borders from stab
QTGMC(InputType=2) # reduce shimmer

But Stab() messed up at the drop/pan shot at the very end of the clip. There are a few other anomalous motions here and there. And a few frames with a little blending. Saturation might be a little too high.

[sanlyn]

I have this video and I wanted to check my workflow with you to see if I have it right, which I think/hope I do!

http://files.videohelp.com/u/183506/revenge.demuxed%20(2).m2v

This video is a PAL to NTSC screwup. This is my script to fix it:

Mpeg2Source("AudioFile_80.ac3.d2v")
AssumeTFF().QTGMC(Preset="placebo")
sRestore()
AssumeFPS(23.976)

The frame size is NTSC, so there is no need to re-size it. sRestore will fix the bad conversion, and from there I chose to slow it to film speed and use besweet to slow the audio to film speed. I will later encode with flags so that it plays at 29.97.

If you have the auido and video together, you don't have to change the audio rate with other software

AssumeFPS("ntsc_film",sync_audio=true)

sRstore won't completely clean up all the framing problems, but as you say it's a screw-up. And more than you think. Aside from distorted motion, and shadow detail and some highlights were destroyed a long time ago. This has been through some kind of non-smart rendering NLE (appears to have been encoded several times, lacks chroma density, is oversharpened). Also halos, edge ghosting, bad backgound flicker, banding, macroblocks and other low-bitrate artifacts, and a sicky-green color balance. Kinda got tired of throwing plugins at it after a while.

As manono suggested a second run with QTGMC with Input_Type=1 will help smooth some of the motion. It'll never look clean, the creator has inflicted too much damage. There's so little video data remaining in the sample, running QTGMC twice on it will have it looking like plastic, so I tried another trick. Added a version of smdegrain to help smooth motion a little more (smdegrain is included at the bottom of the text in the attached script). Also applied three VirtualDub filters (also attached). The attached script does a lot of work, so it crawls along at about 4.5 fps on my i5 PC. Tt takes time to sort out all the garbage. I don't know why people make a mess of digital video to the point where it looks as bad as VHS. I guess they think DVD is supposed to look like tape.

If you try the script, load the attached VDub plugins into your VirtualDub plugins folder. Don't forget to to change the path statements to the plugins and video to match your system.

Why are all of these samples so green?

[hizzy7]

Hi Sanlyn,

Should I apply this script to the clip after my first run of QTGMC or run this script all on its own?

Thank you for the script, the plugins, and your help!

Best,

h

[sanlyn]

Review the script. Run it on its own. It opens the m2v, then uses yadif and sRestore, then QTGMC and some more cleanup filters, in one script. Running QTGMC twice would destroy too much detail with this video. I'd advise against it, and I would advise to avoid running something like QTGMC twice in the same script.

[hizzy7]

Hi Sanlyn & Everyone!

I have been tinkering with the video using sanlyn's script. I was wondering what people think of this?

http://files.videohelp.com/u/183506/revenge%20new.m2v

Thanks!!

[sanlyn]

A big improvement in color and noise reduction, if a bit over filtered. Some of the playback levels are outta sight, but that could be a fault in the original. This looks like a transfer from tape, so color balance will change with every camera shot -- tape is such a headache that way, and nusuallyu requires corection in YUV first, then RGB. Overall, looks much better than the original sample.

[hizzy7]

Hi Sanlyn,

What do you think I could do for the over filtering? Is that just a reality I am stuck with?

Thanks!

[sanlyn]

What kind of denoising did you use? Did you use exactly the same script that I used for the other clip? Rule of thumb: you can't use the same plugins, settings, and procedures for every video. What works well with one won't necessarily work in exactly the same way for another video, especially another video from another movie. That other clip used very strong filtering because of all the noise and frame problems.

[hizzy7]

Hi!

I used your scrip along with a bit of neat video That's probably the difference!

thanks

[sanlyn]

Don't use NeatVideo at strong filtering values. Learn to use the advanced interface, and make sure you have a decent noise sample to work with. Look over their PDF manual. On the right-hand side of the "Noise filter settings" tab and try lower values, such as shown here. Every parameter in this setup panel can be adjusted. The manual explains. Also, take a look and make sure NV is needed at all. Often, it isn't necessary. You have to have at least some noise or grain, because that's actually where most of the "detail" is. Filtering in the "y" channel is the most destructive. If your video is already decently sharp, the 50% sharpening shown below is probably too high. I seldom go that far.


[Attachment 23968 - Click to enlarge]

[hizzy7]

Hi!

I used 10 percent sharpness, and similar noise reduction amounts, but I will dial it down a bit more!

Thanks!

[sanlyn]

If your settings are turned down that much or lower, you might not even need NV. Sometimes I use it just as a sharpener, everything else practically down to zero.

[hizzy7]

Hi folks!

Well, the video looks great now (in my humble opinion!), but I have an audio question. The dvd was 29.97 but was a pal to ntsc screw up. This is part of my scrip (thank you sanlyn!):


MPEG2Source("AudioFile_80.ac3.d2v")
yadif(order=1,mode=1)
sRestore()
AssumeFPS("ntsc_film")

ColorYUV(off_y=-1,off_v=2.5,off_u=1)
DeHalo_Alpha()
MergeChroma(awarpsharp2(depth=30))
DeBlock()

QTGMC(InputType=1)
smdegrain()
GradFun2DBmod(thr=2.2,mask=false)
AddGrainC(1.5,1.5)


My question is, what settings should I be using for the audio in besweet? The dvd was 29.97 ntsc, which I think went to 25 fps with srestore, and then went to 23.976 with AssumeFPS("ntsc_film"). What speed to should audio be? When I try going from 29.97 to 23.976, the audio is way longer than my video. I'm not sure what i should be doing.

thanks again for the help!

h

[jagabo]

SRestore probably gave you 25 fps output without any change in running time. You then intentionally slowed the video to 23.976 fps. So you want 25 fps to 23.976 fps in besweet. I would have left the video at 25 fps and kept the original audio.

[sanlyn]

Looks too fast at 25 fps (in fact, sometimes it looks silly).

AssumeFPS("ntsc_film",sync_audio=true)

[hizzy7]

My audio is still out of sync when I do 25 fps to 23.976. What do you think I could be doing wrong? :P

Thanks!!

[sanlyn]

See post #113, above.

[jagabo]

Check the frame rate after SRestore() with Info().

It what way is your audio out of sync? Does it start out in sync and slowly drift farther and farther out of sync?

[hizzy7]

the audio is off by 1 second, if that makes sense...

[jagabo]

Off by one second for the entire duration of the entire movie? Or starts out in sync and is one second ff at the end? For the former just adjust the delay when you mux the audio and video. For the latter you'll need to calculate the difference and adjust the length accordingly. Ie, if a movie is exactly 2 hours long it is 7200 seconds long. If the audio is one second short (7199 seconds) you need to make it longer by a ratio of 7200/7199, or about 1.00014 x longer, or 0.014 percent longer. It's simple algebra.

[hizzy7]

Sorry, I don't mean to be vague. The audio manipulation is very new to me. I usually use the method you describe above, making the video 25 fps and using the original audio. It looks to be off by one second for the entire duration of the movie. I think it is something I am doing wrong.

[jagabo]

It looks to be off by one second for the entire duration of the movie. I think it is something I am doing wrong.

It's not unusual for audio to be skewed in an MPG file. Just adjust the delay/advance when you mux the final audio and video.