Help on how to get rid of the grain/noise.

[ricardouk]

Hi everyone!

I've been trying to improve the quality of a friends band video recording but so far ive been unable to get rid of the noise using " video smoothners plugins" with avisynth and virtualdub, whenever i get to a point where the grain disappears the details on people and objects start to disapear, can anyone give some advice on how to do it without loosing too much detail? Just pointing me in the right direction would be a great help, im limited to avisynth and virtualdub, heres a 30 second clip of the original video.

thanks.

[jagabo]

You want to use a motion compensated noise reducer like TemporalDegrain(SAD1=200, SAD2=150, Sigma=8).

[ricardouk]

Thanks jagabo, read a lot of your old comments here about similar problems, meanwhile i tried neat video demo with virtualdub and i was amazed at the results...will try your advice, thanks

[jagabo]

If trained properly and not overused Neat Video can work well.

Attached is a video from the above TemporalDegrain script. You can play around with weaker or stronger settings to get what you want. Watch for things like disappearing wood grain on the guitar, texture on the walls.

[themaster1]

first thing first use hdragc..moderately

[ricardouk]

If trained properly and not overused Neat Video can work well.

Attached is a video from the above TemporalDegrain script. You can play around with weaker or stronger settings to get what you want. Watch for things like disappearing wood grain on the guitar, texture on the walls.

I cant use Neat Video as it is payware, unless i resize to 720p and get around the watermark issue, took me a bit to collect all plugins for Temporal Degrain and figuring out fftw3.dll wasnt an avisynth plugin lol, it took 9 minutes to convert a 30s video, 11m with hdragcc added.

first thing first use hdragc..moderately

Thanks, i left it at the default value


here's a sample with all 3 modes compared, despite being darker i think the temporaldegrain script on its own looks better.

[jagabo]

If you change the brightness you'll probably need to change the TD parameters too. I'd use less aggressive levels adjustments too. Try something like:

ColorYUV(off_y=-18, gamma_y=128, cont_u=50, cont_v=50)
TemporalDegrain(SAD1=300, SAD2=220, Sigma=12)

[ricardouk]

If you change the brightness you'll probably need to change the TD parameters too. I'd use less aggressive levels adjustments too. Try something like:

ColorYUV(off_y=-18, gamma_y=128, cont_u=50, cont_v=50)
TemporalDegrain(SAD1=300, SAD2=220, Sigma=12)

i was trying to brighten the video a litle bit, so your ColorYUV part of the script works on its own or does it need hdragcc? im doing a test without it and so far no errors...thanks for all the info and help guys, this is why ive been a part of videohelp for 12 years, always learning new stuff, helping others, video news etc.

hope i dont go offtopic but my final objective is to alternate between 2 videos, whenever i use avisynth to join clips (avisource + avisource) the transition is abrupt/noticeable, most of the time i use join in avisynth to "join" timelapses so i need an abrupt change/transition but not in this situation, is there a way of doing a seamless join? Have a look at the video i posted before to understand what i meant.

[manono]

You can do fades and dissolves in AviSynth, if that's what you mean. There are also many other kinds of transitions available.

[ricardouk]

Hi manono, thanks for the help, i meant a transition without people knowing it was 3 videos joined together, a seamless transition...dont know how to say it better...

https://forum.videohelp.com/attachments/38772-1475425811/comparison3.mp4

in the video above its very noticeable when one video ends and the other starts.

Avisource (01.avi).trim (1,300) + Avisource (01.avi).trim (301,600) + Avisource (01.avi).trim (601,900)

with the above code (at least here) the final video shows "abrupt transition" between clips

[jagabo]

i was trying to brighten the video a litle bit, so your ColorYUV part of the script works on its own or does it need hdragcc?

I meant for ColorYUV to be used intead of hdragcc.

[manono]

...with the above code (at least here) the final video shows "abrupt transition" between clips

Right. You'd have to at least even out the levels/brightness/contrast between that second and third one. Then you can use frame interpolation which may or may not work so well.