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Unofficial VirtualDub Support Forums > Newbie Questions > Video Pane Brightness Control?

Posted by: acenturi Jan 26 2014, 05:02 AM

I've been using the Editor for several years now, primarily on screen captured videos and feel I'm almost an expert in its use. HOWEVER, I've always been mystified as to why there is no brightness adjustment (during editing) on the Input Video Pane. Having this simple function would make frame level editing a lot easier for darker scenes. Typically, the video to be edited and the saved result have the same and near perfect brightness. The problem is the video is usually much darker on the Video Pane. I realize that I can change my display brightness to compensate, but that is a back and forth hassle when doing 10-15 edits a day. Is there a hidden function that I'm missing?
Bill

Posted by: Abrazo Jan 26 2014, 10:11 AM

Myself, I do not have this issue on my portable with Windows 7 32-bit Home Edition...

Can it be that you are using Windows XP / Vista ?

When playing video it uses a kind of "overlay".
In the settings of your video-card / video-driver, it must be possible to adjust it.
Adjusting it in the Video-player itself does not seem to be a good solution.

I found a few (rather old) threads about this issue:
> http://forum.doom9.org/showthread.php?t=129665
> https://forum.videolan.org/viewtopic.php?f=14&t=50836
> http://codecguide.com/faq_display_issues.htm
> http://forum.videohelp.com/threads/306102-Virtualdub-Compression-Brightness-Problem

Maybe it can help ?

Posted by: dloneranger Jan 26 2014, 02:08 PM

The input and output panes should look exactly the same as when played back
Check the following

In the preferences
main section -> Output color depth = match display depth
display section -> from the 'use direct3d' up to 'use directx for display panes', untick and ok each one until it look normal again

If unticking one of those makes it look normal again, then your video drivers are altering the display of video and need to have their settings checked

Posted by: meowmeow Jan 26 2014, 02:29 PM

QUOTE (acenturi @ Jan 26 2014, 05:02 AM)

Having this simple function would make frame level editing a lot easier for darker scenes.

Why not add brightness/contrast filter for output preview pane and remove it before encode?

Posted by: raffriff42 Jan 26 2014, 03:20 PM

Another workaround: http://avisynth.nl/index.php/Main_Page

CODE

Avisource("your video.avi")

## uncomment one (or both) Levels filters below for preview purposes
## see http://avisynth.nl/index.php/Levels

Levels(0, 1.8, 255, 0, 255, coring=false) ## brighter #1 (gamma)
#Levels(0, 1.0, 180, 0, 255, coring=false) ## brighter #2 (contrast)

EDIT if you aren't familiar with Avisynth:
1. download & install it.
2. copy the code above into your text editor
3. change "your video.avi" to the full path to your video
4. save as plain text with .avs extension
5. open .avs in Virtualdub with File, Open video file

Posted by: acenturi Jan 28 2014, 05:24 AM

QUOTE (meowmeow @ Jan 26 2014, 02:29 PM)

QUOTE (acenturi @ Jan 26 2014, 05:02 AM)

Having this simple function would make frame level editing a lot easier for darker scenes.

Why not add brightness/contrast filter for output preview pane and remove it before encode?

Thanks, that's the best solution for me and it works fine.
Thanks everyone for your suggestions.
Bill

Posted by: Altaf Jan 28 2014, 06:09 AM

Эта функция на самом деле нужна многим. Многие не могут пользоваться Avisynth.
А сколько людей пользуются VD вообще не регулярно? Необходимо отрегулировать яркость - контрастность в программе! Было бы супер.
3. Измените путь к Вашему видео - "Проба.avi" - Пожалуйста, напишите каким должен быть файл *.avs. Готовый файл отредактировать легче будет.
-----------------------------
This function is actually necessary to much. Many can't use Avisynth. And how many people use VD not regularly? It is necessary to regulate brightness - contrast in the program!
Would be super.
3. change "your video.avi" to the full path to your video - Please, write what there has to be a file *.avs. The ready file easier to edit will be.