Using HC gui 0.23 how cam you adjust output mpg video brighness levels

[oavs]

Hi

I want to know how can I increase or decrease brighness level of output video.

I am using HC gui 0.23 and blacks coming little too bright or not enough gamma in them.

Can anyone please guide me here

Thank you

[guns1inger]

Adjust them in the avisynth script before you encode

[oavs]

Gosh you were quick. Thanks .

Can you please hint what is the command to say make blacks blacker?

Currently my script only contains -

AVISource("CaroleneNine2.avi")
ConvertToYV12()

[AlanHK]

Color conversion and adjustment filters

probably Levels would be worth trying.

I suggest using AvsP to tweak such filters.

[oavs]

Thanks but its too complicated for me.
All I need to know how to increase or decrease my video bigness level on the out put using HC

[AlanHK]

Thanks but its too complicated for me.
All I need to know how to increase or decrease my video bigness level on the out put using HC

You can't. All adjustments are done in Avisynth. HC just encodes.

[oavs]

Ok.

I have gone back to your previous advice 'tweak' . I have read a little and placed this in the script and can not see any difference in the blacks. have I done it incorrectly?


AVISource("CaroleneNine2.avi")
ConvertToYV12()

Tweak (bright=-20, cont=1.2)

[AlanHK]

Tweak (bright=-20, cont=1.2)

Contrast = 1 is no change, goes up to a max of 10. So 1.2 is a rather small adjustment.
And Brighness ranges from -255 to + 255.

So try some bigger numbers. You can always wind them back.
I really do recommend AvsP -- it creates sliders for the parameters so you can tune them much more easily. It's only a 5 MB download.

[oavs]

Thanks . I have downloaded the AvsP had no idea what to do with it. I managed to load my script and that was it . I'll have another look. It would be great if there was a instant preview of the changes.

[AlanHK]

It would be great if there was a instant preview of the changes.

There is, when you use the sliders. Otherwise, press F5 to refresh.

[poisondeathray]

Is your source material "off" in color?

What are you using to determine if color is off?

Playing it on the pc? Then what software player and renderer? If you aren't using overlay mixer (e.g. might be using vmr9), chances are color will be off. Try playing your output with default settings from SMplayer or VLC

[oavs]

Thank you both. Yes I got it to work and can see in preview. Its a 1 Gb file so preview is little slow. Is there a way within the scrip I can define a segment (may be a few frames) to see the preview to speed it up?

In regards to poisondeathray questions, Yes I am using PC and yes I wil use VLC to test it now. Previously I was using PowerDVD viewer (is it bad?).

And if source material "off" in color? have no idea how to check or change that.

Thank you for your help


Just previewed in VLC and all the colors are wrong. Orange is blue, blacks are dark grey ??

How can you preview between two book marks only?

[poisondeathray]

What is your source material format/codec/container?

Just play it in VLC or SMPlayer to determine if it was already "off" in color, or if it was something you did through your conversion workflow (e.g. filter or color conversion)

I'm not sure why the colors are off in VLC (Did you mean source material or output conversion?) Perhaps it's a video display driver issue? Can you post a screenshot?

I don't use PowerDVD, so I don't know if it's bad. My earlier post was suggesting to check the renderer because "off" colors can easily caused by using a different renderer, but the underlying video maybe perfect. If you attempt to "fix" the colors in a script, you are actually causing the actual video to be distorted - so just rule this out before you go on to fixing colors in a script

If this is just for playback purposes, you can also adjust brightness/saturation/contrast/hue through playback in SMPlayer (and I think KMPlayer and VLC)

[oavs]

Well source is Flash. Some images including the orange thing is from photoshop import into flash. I then export as AVI. Using HC I then convert it to MPG. Up until now client did not complain about the colors so it must be OK. I'll post the screen captures tomorrow . Its 2am here and I am dying to get some sleep. Thanks heaps again.

TBC