Question 1

Will adjusting video speed upload files?

Accepted Answer

No. Speed adjustment is done locally in your browser, the video never leaves your device.

Question 2

Will the audio change pitch (become higher or lower) after speeding up or slowing down?

Accepted Answer

No. After checking 'Keep audio', the tool uses the atempo algorithm to maintain the original pitch while changing speed, resulting in a natural sound without any sharp or deep distortion.

Question 3

What speed factors are supported?

Accepted Answer

Supports common speed factors from 0.25× (quarter speed slow motion) to 4× (four times fast forward). Slow motion extends the footage smoothly, while fast forward shortens the duration.

Question 4

Will adjusting speed reduce video quality?

Accepted Answer

Speed adjustment requires re-encoding, but high-quality parameters are used, resulting in minimal quality loss.

Video Speed Control

FAQ