how to fix random change of color

[baunduley]

the color changes in the video randomly.
once it the color scheme is reddish and a little greenish in the very next frame.

eg. screen

frame #16984

frame #16985

this change hasn't maintained any numerical series...its completely random. is there any way to fix this any how?

i've cut the video and giving a sample clip here...

http://www.mediafire.com/?x6nxz6u6fkf65gy

now please answer these stupid questions, if u can (i nothing but a newbie...
1. this video is highly deinterlaced, i've tried QTGMC(Preset="Very Slow", SourceMatch=2, Lossless=2, EZKeepGrain=0.5, Sharpness=0.1, Sbb=0)
, and has got decent result but it is taking very long time to rip.....is there any better way to deinterlace it?

and what are the other problems of this video i should worry about? and the suitable options to tweak it......
thanx in advance

[manono]

1. this video is highly deinterlaced, i've tried QTGMC(Preset="Very Slow", SourceMatch=2, Lossless=2, EZKeepGrain=0.5, Sharpness=0.1, Sbb=0)
, and has got decent result but it is taking very long time to rip.....is there any better way to deinterlace it?

Like every other Angel DVD I've seen (mostly Uttam Kumar and Suchitra Sen movies), it's field-blended from a poor PAL to NTSC conversion. Therefore just deinterlacing it isn't enough. It has to be unblended. And for faster results try Yadif in bob mode, something like this:

Yadif(Mode=1)
Srestore()

And I don't know how to fix those random green blotches every several frames.

and what are the other problems of this video i should worry about? and the suitable options to tweak it......

I remove the nasty Angel logo using the Inpaint Function.

[baunduley]

thanx a lot for ur help....

what about color correction? should i play with some such filters, or better to leave as it is?
and what about little sharpening....

i have a lot of time, i just want a (almost) perfect result,... please suggest some filters to play with

[baunduley]

Like every other Angel DVD I've seen (mostly Uttam Kumar and Suchitra Sen movies......)

this has left my jaws open......never expected that u would be aware of Uttam Kumar and Suchitra Sen, and even bengali movies!
i wish i could ever watch your magical touch over these legendary movies


(if dis off topic? den sorry)

[manono]

Because undoing the field-blending leaves behind a soft-looking picture, I usually sharpen it up, yes. I use LimitedSharpenFaster, but there are many AviSynth sharpeners. Because, for some reason, the field-blended ones are also slightly dull-looking and desaturated, I also increase the saturation using the Tweak filter.

Suchitra Sen was a great, great actress. And she didn't look bad, either, during her prime years.

[baunduley]

cant load yadif......even it can't load the the plugin.....what could be the problem? i can see the yadif.dll in the plugins folder with the others

[baunduley]

Load_Stdcall_plugin

prob fixed.......

[sanlyn]

And telecined, as well.

[sanlyn]

Load_Stdcall_plugin

prob fixed.......

LoadCPlugin

what about color correction? should i play with some such filters, or better to leave as it is?
and what about little sharpening....

Not much color correction needed, except that the darks (and blacks) look very green. Best done in RGB with VirtualDub filters like gradation curves or ColorMill.

A little sharpening. Not much, unless fixing the blended fields softens too much.

[baunduley]

And telecined, as well.

how to fix that?

[jagabo]

As for the colors, you can try something like:

MergeChroma(last, McTemporalDenoise(settings="high"))

That reduces the flicker quite a bit. Maybe couple that with a deflicker filter.

[baunduley]

As for the colors, you can try something like:

MergeChroma(last, McTemporalDenoise(settings="high"))

That reduces the flicker quite a bit. Maybe couple that with a deflicker filter.

thanx bro

[jagabo]

It could use some sharpening, deblocking, deshaking, etc. But here's a start with frame rate restoration, flicker reduction, chroma noise reduction, and spot removal:

LoadVirtualDubPlugin("g:\Program files\VirtualDub\plugins\deflick.vdf","DeFlick") 

function RemoveSpots(clip input, bool "_grey", int "repmode") 
{
    _grey=default(_grey, false)
    repmode=default(repmode, 16)
    clmode=17
    clensed=Clense(input, grey=_grey, cache=4)
    sbegin = ForwardClense(input, grey=_grey, cache=-1)
    send = BackwardClense(input, grey=_grey, cache=-1)
    alt=Repair(SCSelect(input, sbegin, send, clensed, debug=true), input, mode=repmode, modeU = _grey ? -1 : repmode ) 
    restore=Repair(clensed, input, mode=repmode, modeU = _grey ? -1 : repmode)
    corrected=RestoreMotionBlocks(clensed, restore, neighbour=input, alternative=alt, gmthreshold=70, dist=1, dmode=2, debug=false, noise=10, noisy=12, grey=_grey)
    return corrected
}  

Mpeg2Source("VTS_01_1.d2v") 
Yadif(mode=1)
SRestore()

ConvertToRGB()
DeFlick(8, 10, 0, 7, 0) # window size, softening, interlaced, scene change threshold, show scene change
ConvertToYV12()

MergeChroma(last, McTemporalDenoise(settings="high"))
RemoveSpots()

[sanlyn]

Good ol' RemoveSpots(). It'll do more than just remove spots, BTW, as I recently discovered elsewhere (would you believe it can help steady slightly fluttery small objects?). I also used DeVCR on those rips; cleared about half of them. Most of the remaining blips can be handled by "borrowing" small patches from clean frames and overlaying them on the remaining bad guys. Pain the neck, though.

[baunduley]

It could use some sharpening, deblocking, deshaking, etc. But here's a start with frame rate restoration, flicker reduction, chroma noise reduction, and spot removal:

LoadVirtualDubPlugin("g:\Program files\VirtualDub\plugins\deflick.vdf","DeFlick") 

function RemoveSpots(clip input, bool "_grey", int "repmode") 
{
    _grey=default(_grey, false)
    repmode=default(repmode, 16)
    clmode=17
    clensed=Clense(input, grey=_grey, cache=4)
    sbegin = ForwardClense(input, grey=_grey, cache=-1)
    send = BackwardClense(input, grey=_grey, cache=-1)
    alt=Repair(SCSelect(input, sbegin, send, clensed, debug=true), input, mode=repmode, modeU = _grey ? -1 : repmode ) 
    restore=Repair(clensed, input, mode=repmode, modeU = _grey ? -1 : repmode)
    corrected=RestoreMotionBlocks(clensed, restore, neighbour=input, alternative=alt, gmthreshold=70, dist=1, dmode=2, debug=false, noise=10, noisy=12, grey=_grey)
    return corrected
}  

Mpeg2Source("VTS_01_1.d2v") 
Yadif(mode=1)
SRestore()

ConvertToRGB()
DeFlick(8, 10, 0, 7, 0) # window size, softening, interlaced, scene change threshold, show scene change
ConvertToYV12()

MergeChroma(last, McTemporalDenoise(settings="high"))
RemoveSpots()

the sample just awesome, can't wait to check it out

endless thaks bro

[baunduley]

It could use some sharpening, deblocking, deshaking, etc. But here's a start with frame rate restoration, flicker reduction, chroma noise reduction, and spot removal:

LoadVirtualDubPlugin("g:\Program files\VirtualDub\plugins\deflick.vdf","DeFlick") 

function RemoveSpots(clip input, bool "_grey", int "repmode") 
{
    _grey=default(_grey, false)
    repmode=default(repmode, 16)
    clmode=17
    clensed=Clense(input, grey=_grey, cache=4)
    sbegin = ForwardClense(input, grey=_grey, cache=-1)
    send = BackwardClense(input, grey=_grey, cache=-1)
    alt=Repair(SCSelect(input, sbegin, send, clensed, debug=true), input, mode=repmode, modeU = _grey ? -1 : repmode ) 
    restore=Repair(clensed, input, mode=repmode, modeU = _grey ? -1 : repmode)
    corrected=RestoreMotionBlocks(clensed, restore, neighbour=input, alternative=alt, gmthreshold=70, dist=1, dmode=2, debug=false, noise=10, noisy=12, grey=_grey)
    return corrected
}  

Mpeg2Source("VTS_01_1.d2v") 
Yadif(mode=1)
SRestore()

ConvertToRGB()
DeFlick(8, 10, 0, 7, 0) # window size, softening, interlaced, scene change threshold, show scene change
ConvertToYV12()

MergeChroma(last, McTemporalDenoise(settings="high"))
RemoveSpots()

the script u've sent me is really incredible, but it is taking too many time to process (around 1.5 fps)
it is more than 2hrs long movie and will take 3-4 days to rip, which is really a great pain.

is there ne shortcut please?

[jagabo]

Yes, McTemporalDenoise() is very slow. You can try substituting another temporal denoiser like TTempSmooth(), CNR2(), etc. You'll have to use high settings to get the color flicker down. And you'll risk getting too much ghosting.

[poisondeathray]

the script u've sent me is really incredible, but it is taking too many time to process (around 1.5 fps)
it is more than 2hrs long movie and will take 3-4 days to rip, which is really a great pain.

is there ne shortcut please?

What happened to having a "lot of time"

i have a lot of time, i just want a (almost) perfect result,... please suggest some filters to play with

[baunduley]

the script u've sent me is really incredible, but it is taking too many time to process (around 1.5 fps)
it is more than 2hrs long movie and will take 3-4 days to rip, which is really a great pain.

is there ne shortcut please?

What happened to having a "lot of time"

i have a lot of time, i just want a (almost) perfect result,... please suggest some filters to play with

oh!!! actually with the term 'a lot of time' i meant to say that i REALLY have a lot of time for experiment ........ running my laptop consecutively 4-5 days is a real pain

[poisondeathray]

I was just joking giving you a hard time

Personally I think you should be using QTGMC instead of yadif - but this is even slower (even on the faster preset settings) but the quality is much better

Yadif tends leaves aliasing artifacts and jaggy dot artifacts, it messes up fine detail and picture isn't as clear (but part of the reason is QTGMC countersharpens as well)

You decide where you want to make tradeoffs in quality vs. speed

[baunduley]

the script u've sent me is really incredible, but it is taking too many time to process (around 1.5 fps)
it is more than 2hrs long movie and will take 3-4 days to rip, which is really a great pain.

is there ne shortcut please?

What happened to having a "lot of time"

i have a lot of time, i just want a (almost) perfect result,... please suggest some filters to play with

why dont share your own view please?......what is your suggestion?
different people's different views will help me to clear my conceptions.
thanx in advance

[baunduley]

I was just joking giving you a hard time

Personally I think you should be using QTGMC instead of yadif - but this is even slower (even on the faster preset settings) but the quality is much better

Yadif tends leaves aliasing artifacts and jaggy dot artifacts, it messes up fine detail and picture isn't as clear (but part of the reason is QTGMC countersharpens as well)

You decide where you want to make tradeoffs in quality vs. speed

earlier i've used qtgmc and the result was satisfactory too, but it takes very long

is there no option to speed it up? it took more than three days
i used virtualdub 2 pass..... was i right?

[jagabo]

If you have a multicore CPU you use a multithreaded build AviSynth.

Use VirtualDub in single pass mode for the AviSynth filtering. Output to a lossless intermediate. Then use that for your final compression. That will cut your filtering time in half.

[baunduley]

....Then use that for your final compression....

i didn't get this, will u please explain it?

[poisondeathray]

earlier i've used qtgmc and the result was satisfactory too, but it takes very long

My opinion is if you want an "almost perfect result" as you claim, you should invest the time fixing it up properly . Personally I would never use yadif for any restoration or fix. It's not good enough and destroys quality, introduces aliasing artifacts. QTGMC on one of the faster settings is enough to prevent this (you don't need to use the super slow settings you used earlier , but even on "faster" settings it's many times slower than yadif)

You think it's a "pain" now , but if it was important to me, I would even take the extra steps to manually fix the other problems like scratches & other film defects that some of the filters miss. e.g. long scratches and persistent defects (lasting over 1 frame) will be missed. All scene changes will be missed - spot/dirt removal filters compare between frames, so at the end of a scene and a beginning of the next scene will remain "dirty" because there is no adjacent frame to compare to.

Better quality usually means taking longer . So it depends on how good of a job you want to do, and how much time you are willing to invest, and the tradeoffs you're willing to make



Also, a laptop typically isn't a good computer for any video processing. Cooling is insufficent, and they are usually too slow (unless you have a monster DTR that cost more than desktops) . If you have access to multiple computers, you can split up the processing e.g. do different episodes on different computers

[baunduley]

earlier i've used qtgmc and the result was satisfactory too, but it takes very long

My opinion is if you want an "almost perfect result" as you claim, you should invest the time fixing it up properly . Personally I would never use yadif for any restoration or fix. It's not good enough and destroys quality, introduces aliasing artifacts. QTGMC on one of the faster settings is enough to prevent this (you don't need to use the super slow settings you used earlier , but even on "faster" settings it's many times slower than yadif)

You think it's a "pain" now , but if it was important to me, I would even take the extra steps to manually fix the other problems like scratches & other film defects that some of the filters miss. e.g. long scratches and persistent defects (lasting over 1 frame) will be missed. All scene changes will be missed - spot/dirt removal filters compare between frames, so at the end of a scene and a beginning of the next scene will remain "dirty" because there is no adjacent frame to compare to.

Better quality usually means taking longer . So it depends on how good of a job you want to do, and how much time you are willing to invest, and the tradeoffs you're willing to make



Also, a laptop typically isn't a good computer for any video processing. Cooling is insufficent, and they are usually too slow (unless you have a monster DTR that cost more than desktops) . If you have access to multiple computers, you can split up the processing e.g. do different episodes on different computers

okk i'll try my best

[jagabo]

....Then use that for your final compression....

i didn't get this, will u please explain it?

Since the AviSynth filtering is going to take a long time you want to perform it only once. So you open your AVS script with VirtualDub, set it up to output to a lossless video codec like Lagarith, and save the filtered results to a file. Then you open that filtered video with VirtualDub and perform your two pass compression to Xvid, or Divx, or whatever you are using.

So if the AviSynth filtering takes 48 hours your two step encode will take 48 hours for the filtering, plus an hour for the 2 pass encode -- 49 hours. Where as if you performed a two pass encode on the AVS script you would be filtering your video twice, 96 hours, plus an hour for the encoding -- 97 hours.

[baunduley]

....Then use that for your final compression....

i didn't get this, will u please explain it?

Since the AviSynth filtering is going to take a long time you want to perform it only once. So you open your AVS script with VirtualDub, set it up to output to a lossless video codec like Lagarith, and save the filtered results to a file. Then you open that filtered video with VirtualDub and perform your two pass compression to Xvid, or Divx, or whatever you are using.

So if the AviSynth filtering takes 48 hours your two step encode will take 48 hours for the filtering, plus an hour for the 2 pass encode -- 49 hours. Where as if you performed a two pass encode on the AVS script you would be filtering your video twice, 96 hours, plus an hour for the encoding -- 97 hours.

thanx a lot bro

i wonder how you the pros keep patience and spend a lot of time for a novice like me!
a mere thanx is just not enough.............thanx to all of you
i'm in love with videohelp

[baunduley]

@manono, @sanlyn, @jagabo, @poisondeathray
i've created a sample with the great help of all of you but i'm not totally satisfied with the output..........
i think there there are lots of room left to be improvised. but i'm confused
please check the sample and please suggest where can i modify.... it'll be a great help

http://www.sendspace.com/file/zfutyg

thanx in advance to all of you

[manono]

To begin with, the audio is out of synch and it plays with the wrong aspect ratio.

You made this thing? If so, people need to see the source, not your reencoding of it. Also, what script did you use to make this?

This is from the same movie from before? Those Angel DVDs will never look good. They field-blend everything and (as far as I know) use VHS tapes as their source. They're all utter garbage and there's only so much you can do to improve them.