Change the brightness or contrast of a video

From VideoLAN Wiki

The VLC media player permits adjustments to a currently playing video. You can tweak the brightness, contrast, and hue (and other settings) in real-time. To preserve the effects, save the video as it plays. This way, the rendering alterations can be applied permanently. This example discusses altering brightness and contrast of a video. But other effects can easily be applied as well.

Changing a video's brightness permanently

Here's a step by step approach. We'll use the VLM Control to choose video input and output files. We'll also use the Extended GUI option to create our effects. We'll even handle a bug that crops up when VLC reads/writes files.

Setup for broadcast.

1. Choose View / VLM Control... from the menu.
2. Type something in the Name box.
3. Choose an Input file by browsing to the video you want to change. Location may be an issue, so place it where the directory path is fairly short, e.g. "C:\temp" on a Windows box. When you hit Choose the Open... File dialog appears.
4. Run the transformation (may require to expand the window to show controls)
5. If output file does not maintain the changes try toggling the video overlay setting (CTRL-S - Video)