After using transform to set area to be cropped, black bars show at right and bottom of output

S

solcury

New Member
I've set to crop off 74px from the left of the screen and 64px from top of the screen:

The monitor's natural resolution is 1920x1200, resulting in 1846x1136, to be displayed.
I went to Settings > Video and set base canvas to 1920x1200 and output (scaled) resolution to 1846x1136.

This is what the output looked like:

Preview has a red outline

I manged to move that red outine and get rid of the black bar, but I that changed in the resolution in Edit > Transform, from 1920x1200 to 1996.9663x1248.5916
The crop settings of 74 and 64 are left alone.

I'm concerned this solution/improvisation may distort the quality.
 
Last edited:
A

AaronD

Active Member
solcury said:
I've set to crop off 74px from the left of the screen and 64px from top of the screen:

The monitor's natural resolution is 1920x1200, resulting in 1846x1136, to be displayed.
I went to Settings > Video and set base canvas to 1920x1200 and output (scaled) resolution to 1846x1136.
Click to expand...
You're thinking in terms of things matching. Don't. All of the processing steps are sequential, with no memory of the previous step. Each step simply receives something, with no idea of how that something was produced, does what it's set for, and passes it on to the next step.

In your case, you took a (presumably) 1920x1200 image from the screen capture, cropped it to 1846x1136, moved it back to the top-left corner of a 1920x1200 canvas (leaving the empty space at the bottom-right), and then scaled that entire 1920x1200 canvas to 1846x1136. So your video file is 1846x1136, and still has the empty space at the bottom-right of the cropped image, which itself is no longer that size but something smaller because of the scaling.

solcury said:
I'm concerned this solution/improvisation may distort the quality.
Click to expand...
Absolutely it does! See above for what it's actually doing. OBS is very good at scaling, but when you scale down at all, even if it's mathematically perfect, you lose some information that you can't get back.
 
You must log in or register to reply here.
Top