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Variable Frame Rate Checker

Is this video CFR or VFR?

Read the frame-rate mode directly from the video without uploading it. Useful for phone footage, screen recordings, streams and files that behave unpredictably on an editing timeline.

✓ Local analysis✓ CFR / VFR✓ Min / max FPS when reported

Choose a video file

MP4, MOV, MKV, WebM and other formats MediaInfo can read.

Your file is analyzed locally in your browser.

Frame-rate analysis

Is this video CFR or VFR?

ClipCompat checks the frame-rate mode reported by the file and shows average, minimum and maximum rates when available.

Choose a video file to begin.

What VFR means

Average FPS does not tell the whole story.

A file can report an average near 30 or 60 fps while the time between frames changes throughout the recording. ClipCompat checks the frame-rate mode and, when MediaInfo exposes them, the reported minimum and maximum rates.

CFRConstant Frame Rate: frame timing is reported as constant.
VFRVariable Frame Rate: the source changes timing across the recording.
UnknownIf the file does not expose enough timing metadata, the checker says Test Required rather than guessing.

When it matters

Look at VFR when the timeline feels wrong.

VFR can become relevant when you see proxy mismatches, timing drift, sync trouble or inconsistent scrubbing. The safe response is to preserve the original and create a separate CFR edit copy only when the workflow actually needs it.

Related guides

Read the troubleshooting guides for this workflow.

Use the guide for the symptom, then return to the checker with the actual file facts.

Guide 07

Variable Frame Rate Guide

Learn what variable frame rate means, how to detect VFR, when it can affect editing, and when a CFR edit copy is actually useful.

Read guide →Guide 08

OBS Recording Editing Problems

Understand OBS recording container, codec and audio-track choices before editing in Premiere Pro or DaVinci Resolve.

Read guide →

Related Lab Cases

Compare a CFR baseline with a VFR source.

ClipCompat Lab Cases use tiny synthetic files so compatibility logic can be checked without relying on private user footage.

Case 01Supported

H.264 CFR

A small synthetic MP4 that represents a conventional H.264 editing baseline.

Open case →
Case 02Editing Risk

H.264 VFR

Synthetic H.264 MP4 with irregular frame timing to test VFR detection and verdict priority.

Open case →