Quick answer

Open Tools → Effects and Filters → Video Effects → Essential, enable Image adjust, and make small changes while a representative scene is paused.

Understand the task

A video that can be compared with a second known-good file or display.

VLC’s image filter changes brightness, contrast, color, and sharpness during playback.

The displayed output changes, but missing detail cannot be restored to the source video.

Tip: Move one control at a time and compare it with the filter turned off.

Check a second known-good video first; if both look wrong, inspect display and driver settings.
Enable Image adjust and move only one control at a time.
Compare with the filter disabled before accepting the result.
Disable the effect after viewing unless you deliberately want it applied to other files.

Player-side corrections do not repair clipped highlights or crushed shadows missing from the source.
Different output modules and HDR workflows can change how the same adjustment appears.

If the image is stretched or letterboxed, fix VLC aspect ratio before adjusting brightness or sharpness.

If the picture is sideways, use VLC rotation controls rather than compensating with image filters.

To apply a consistent display to a sequence of photographs, set up a timed VLC photo slideshow after one image looks correct.

Menus can differ by VLC version and operating system. If a verified current build behaves differently, report the exact version and platform.