Bluray to mkv with contrast ajustment?

[bagmand]

Hi.
Is there a free program that can convert bluray-files "m2ts" to mkv, like Handbrake, but with the ability to adjust brightness, contrast, and saturation? I know Dvdfab has the ability, but it's expensive and not very good at it.

[ProWo]

Clever FFmpeg-GUI.
Load your m2ts, click encode videostream, set the encoder, click adjustment, make you settings, you can also preview the result, and click encode.
If done, mux the streams to mkv.

[bagmand]

Thanks. Will try.

[bagmand]

It works fine. But there is one thing. Can I force it to 4 reference frames in x264 mode when I use the preset "slower"? You can do that in Handbrake. And if I don't, it automatically becomes 8. And it causes pixel errors, on my LG Oled tv. "Slower" gives a little better quality than "slow" does.