Compare two videos
Put two clips next to each other, map where they differ, or measure the gap.
Your file
Drop a file here, or click to choose
It stays on this device. Nothing is sent anywhere.
The first file is the reference, this one is what it gets measured against.
Settings
Three ways to compare
- Side by side stacks the two clips in one frame. The honest way to judge a compression setting, because you see both at once rather than trusting your memory of the first.
- Difference subtracts one from the other, so anything identical goes black and anything changed lights up. This is how you find out exactly what an edit touched.
- Score computes a similarity figure across the whole clip, which is useful when the difference is too small to see but you still want a number.
Line them up first
Comparison only means anything if both clips start at the same moment. If one has a few extra frames at the head, trim it first, otherwise every frame will read as different.
Common questions
The difference view is entirely black. Is it broken?
No, that means the two files are visually identical, which is the answer you wanted.
What score counts as good?
For a compression check, higher is closer to the original. Judge it relative to another setting on the same footage rather than against an absolute threshold.
Do the clips need the same resolution?
They are scaled to a common canvas first, so mismatched sizes still work, though a large mismatch makes the difference view less useful.