Video going from blurry to real sharp back and forth

[killerteengohan]

I noticed in half the scenes of my source, the video is quite soft looking and in the other half its quite sharp. It doesn't just randomly changed sharp to soft and back at the same intervals, it does it just about every couple minutes or when a new scene comes up.

I use a sharpener to fix the softer scenes, but then the real sharp ones are far too sharpened.

Is there a smart filter that auto adjusts or a way to get the video to stay about the same sharpness in all scenes or for the length of the video?

Or am I going to have to do it the hard way and specify different sharpness strengths for different frames with a very long script and check every frame in the video to know which frames get what sharpness levels?

[poisondeathray]

No. There is no accurately detect how "sharp" a video is - so you will have to apply different filters manually per scene

[killerteengohan]

Alrighty, thanks!

[jagabo]

Use an edge detector, like mt_edge(), to build a mask. Then use that mask to overlay only where there aren't very sharp edges already. Adjust the threshold values to suit.