Convert variable frame rate (VFR) to constant for editing

Phones, OBS and screen recorders save video with a variable frame rate. Editors expect a constant one — otherwise audio slowly drifts out of sync. Convert before importing.

Your files stay on your device. Nothing is uploaded.

Drop videos here

File	Length	Size	Result

Estimates may change after processing.

If a video doesn’t fit — split it into parts Keep capture date and location

Preset

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Size & quality Fit to size (slider above) Fixed bitrate Mbps Quality level Bitrate mode

Video Format Container Frame rate Keyframe every, s Rotate Encoder

Sound Codec Bitrate Sample rate Channels Loudness Peak no higher than

Trim, split & name Start of the clip (min:sec) End of the clip (min:sec) Split into parts Part length, s Add to file name

Symptoms of variable frame rate

Audio drifts out of sync the further you go on the timeline
Stuttering playback or dropped frames in Premiere Pro or Resolve
MediaInfo shows “Frame rate mode: Variable”

What this preset does

Re-encodes at a constant frame rate (the average of the source)
High quality H.264 that never exceeds the source bitrate
A keyframe every second for snappy scrubbing on the timeline
48 kHz AAC audio — the editing standard

Questions

Why does audio go out of sync in Premiere?

Usually because the clip has a variable frame rate. Converting it to constant frame rate fixes the drift.

Does it lower the quality?

The “very high” quality level is used and capped at the source bitrate, so the difference is not visible.

Last updated: 2026-10-30

See also