Question 1

How do I check a video’s frame rate?

Accepted Answer

Upload or drag and drop one video file. The tool analyzes it automatically and displays the frame rate in frames per second (FPS). No conversion or download is required.

Question 2

How is the frame rate calculated?

Accepted Answer

The tool scans the encoded packets in the primary video track. For video, each packet represents one frame, so the average number of packets per second is reported as the average frame rate.

Question 3

Does the checker support variable-frame-rate video?

Accepted Answer

It can analyze a variable-frame-rate video, but it reports one average frame rate for the entire primary video track. It does not show minimum, maximum, or moment-by-moment frame rates, and it does not label a file as constant or variable frame rate.

Question 4

Why does the result say 29.97 FPS instead of 30 FPS?

Accepted Answer

The checker does not replace measured values with standard frame-rate labels. It displays the calculated average rounded to a maximum of two decimal places. For example, 29.97 remains 29.97 FPS, while 23.976 is displayed as 23.98 FPS.

Question 5

Which video formats can I check?

Accepted Answer

The page accepts MP4, M4V, MOV, WebM, MKV, TS, MTS, and M2TS files. It can also accept another browser-recognized video file when its container can be read by the underlying parser.

Question 6

Does checking the frame rate change or compress my video?

Accepted Answer

No. The checker only reads information from the file. It does not re-encode, compress, edit, or create a modified copy of the video.

Question 7

Which video track is checked?

Accepted Answer

The checker analyzes the file’s primary video track. If a container has multiple video tracks, it does not provide separate frame-rate results for every track.

Question 8

Why can’t the tool read my file?

Accepted Answer

The file must contain a readable video track. A file with no video track is rejected, and an error is shown when the container or its contents cannot be parsed.

Video frame rate checker

Frequently Asked Questions