Color invasion

[carlmart]

This image is taken from a bluray version of a film.

Have a look at the green invasion into many areas, I think it's called fringing, but I'm not sure.

Apparently it was badly captured during the film/video conversion, with a misaligned camera.

A friend of mine told that it's possible to correct that, possibly using a Virtualdub plugin. Is that true?

How should I proceed?

[jagabo]

Shifting the red channel up by a few lines helps. I don't know if there's a VirtualDub filter for this but in AviSynth:

ImageSource("Bend.jpg") 

red = ShowRed() # separate red, green, blue channels
green = ShowGreen()
blue = ShowBlue()

red = red.Crop(0,2,0,0).AddBorders(0,0,0,2) #shift red up by two lines

MergeRGB(red, green, blue) # merge red,green,blue back together

[carlmart]

How and using what do I run AviSynth in HD?

[jagabo]

Do you know AviSynth at all?

A full script might look like:

LWLibAVVideoSource("filename.m2ts") # load video

ConvertToRGB(matrix="rec.709") # HD YV12 to RGB

red = ShowRed() # separate red, green, blue channels
green = ShowGreen()
blue = ShowBlue()

red = red.Crop(0,2,0,0).AddBorders(0,0,0,2) #shift red up by two lines

MergeRGB(red, green, blue) # merge red,green,blue back together

ConvertToYV12(matrix="rec.709") # back to HD YV12

# any other cleanup here...

You open that script with an editor/encoder that supports AviSynth scripts as input, for example VirtualDub, MeGUI, x264 CLI, etc., then encode. Then mux with the original audio.

In addition to the bad red channel registration, your sample image looks like poorly upscaled standard definition video tape. It could probably use some other filtering.

[carlmart]

Well, know Avisynth as I should I don't know. But I used it a lot a few years ago to convert mkv files onto DVD, and also to correct many problems the video or audio tracks had.

I collected a large list of plugins, which I still have, even if I do not use them.

AviSynth tools would become very handy to convert many DVDs I have onto mkv, using some plugins to improve resolution, at least visually. So I would love to find a way to do that, which I guess there might be.

In those times I used AvsP to look at how things changed with plugins and HCenc to make the conversion. They turned out beautifully.

But I don't know what programs to use in HD.

About the film, even if it comes from a Bluray, I don't think the film was masterized to HD, it certainly looks like an upscale.

[jagabo]

All the functions I used in that script are built into AviSynth. Except LWLibavVideoSource(). If you don't have that you will need to get the LSMash package and put LSmashSource.dll in AviSynth's plugins folder.

If you want to upscale DVDs you'll want to use nnedi3. If you ever install MCTemporalDenoise or QTGMC you will already have nnedi3. Cartoons upscale pretty well.

https://forum.videohelp.com/threads/387998-Ripping-a-DVD-in-order-to-deinterlace-decom...it#post2511590

Real video doesn't upscale as well but you can get results better than your TV/DVD player can give.

Post a short sample of this Blu-ray video (don't re-encode) if you want input on it. Or of a DVD you want to upscale.

[carlmart]

I didn't intend to use other plugins, but those of Avisynth.

The question is which program I run them with for HD files.

On DVD I used HCenc. What should I use now to load the plugins in?

[carlmart]

Oh, I forgot. I have been using Vidcoder to make my DVD to MKV conversions.

Excellent as the program is, it doesn't allow any enhancements.

My task would be to get similar results to what I get playing and upscaling DVDs in my Proview DVP-858 player.

The upscaling is much better than on most BD players. I even thought of getting an HD capture recorder and use the Proview HDMI output. But I'm sure there must be a way to get a similar result with soft. Isn't it?

[jagabo]

The question is which program I run them with for HD files.

You can use any editor/encoder that supports AviSynth scripts as input. VirtualDub FilterMod, VirtualDub, MeGUI, x264 cli encoder, etc.

[carlmart]

How do you proceed with x264 encoder for instance, in order to load the video file and the plugins?

Can I use some AvsP HD version (if any) to check different plugins and gradations?

Any tutorial anywhere?

[jagabo]

I use Notepad to edit my AVS scripts, VirtualDub to view the results. You can use AvsP if you want. Tutorial for what? Upscaling? I've posted many examples here. Search for nnedi3_rpow2.

[carlmart]

Yes, I also used Notepad for editing the scripts, and I did have a collection of them. They are probably on one of my old IDE HDDs.

Then I loaded them in AvsP to check on the results, and then (in that case) in HCenc to generate the DVD files.

I wondered if there was some tutorial for upscaling and for working with HD files, in MKV or whatever. On the script up above you used LWLibAVVideoSource. Do I have to use that?

Will search for nnedi3_rpow2, here and on Google.

[jagabo]

Use whatever source filter you want. For MPEG 2 sources (DVD) I would use DgDecode (DgIndex and Mpeg2Source()). I don't know of any upscaling tutorials.

http://avisynth.nl/index.php/Nnedi3
http://avisynth.nl/index.php/DGDecode
http://avisynth.nl/index.php/LSMASHSource

[carlmart]

Correct me if I'm wrong. These are examples of upscaling?

https://forum.videohelp.com/threads/387998-Ripping-a-DVD-in-order-to-deinterlace-decom...it#post2511590

First I generate the d2v or avs file (how did I do that?) to load the DVD files, load the script into X264 or MEGUI, upconvert it, using filters or not, and get what file type from it?

[jagabo]

Correct me if I'm wrong. These are examples of upscaling?

https://forum.videohelp.com/threads/387998-Ripping-a-DVD-in-order-to-deinterlace-decom...it#post2511590

Yes, that was from a DVD. The DVD was made from a studio analog video tape.

First I generate the d2v or avs file (how did I do that?)

Use DgIndex to make the index file. Then make a script with Notepad that starts with:

Mpeg2Source("filename.d2v")

Change filename.d2v to whatever you named the d2v file. You'll probably also need to inverse telecine

TFM()
TDecimate()

or deinterlace:

QTGMC()

Then upscale and maybe sharpen:

nned3_rpow2(4, cshift=Spline36Resize", fwidth=1920, fheight=1080) # for a 16:9 video, 1440x1080 for a 4:3 video
awarpSharp(depth=10)
Sharpen(0.3)

But exactly what you want to do depends on the source. The cleaner you get the source the better the upscaling can be.

Finally load the script into X264 or MEGUI or whatever program you plan to use to encode.

I recommend you use DgIndex to extract a short portion of your video (mark a 30 second segment from the main movie, then File -> Save Project and Demux Video) and upload it (the m2v) here to get more detailed instructions for the particular video.