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Thursday 21.8.2025 / 02:06
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afterdawn.com > forums > digital video > video to dvd > how to level out the brightness?
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How To Level Out The Brightness?
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abrogard
Member
_ 		22. August 2008 @ 02:57 _ Link to this message    Send private message to this user   
I have a couple of video clips made by my little Canon A520 digital camera. On video mode it is very sensitive to light changes and a couple of times on videos taken indoors the simple fact of the sun going behind a cloud outside, or somebody standing in front of the window has made the clip darken considerably. Too much.

How can I fix this? Using, for instance, Virtual Dub?

Must I select the affected area and cut it out and brighten that section and then join it back in?

Or is there a tool that will level the brightness throughout the clip perhaps?

Or is there a prog that makes doing this easier and not so liable to a sudden jump in brightness as I get when I cut the bit out, brighten in and then stick it back in?

I have got that expensive fancy prog Premier Pro but I never use it. It is too complicated right from the beginning where it asks about presets and when I consulted their forum for help all their gurus told me my source material was too low class for their high class product and told me to go away and get a uni degree in video editing first.

But I mention it because a more rational forum (hooray for afterdawn) may find it a useful product and have a simple set of instructions for me on how to use it for, for instance, this problem.

And then again: it may have nothing to do with it. Fine. Please forgive my mentioning it.

regards,

ab :)
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davexnet
Senior Member
_ 		22. August 2008 @ 04:25 _ Link to this message    Send private message to this user   
I think there is something in Avisynth that does it.
Take a look at the "autogain" description in ColorYUV:

http://avisynth.org/mediawiki/ColorYUV
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attar
AfterDawn Addict
_ 		22. August 2008 @ 18:21 _ Link to this message    Send private message to this user   
One of Jimmy Ruska's VirtualDub tutorials covers the use of the 'blend' option available to some filters.
In this case you would select a brightness level and apply it to the sections where it need lightening.



http://youtube.jimmyr.com/tutorials/Appl..._Virtualdub.php
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