Change Video Speed, Every Setting: Pitch, Blend, Exact Length

Every setting of the free Video Speed tool on a 14.7-second 1080p clip with a voice: 2x gives 0:07.4 and the picture is COPIED, not re-encoded — so the file stays 20.9 MB (the same 442 frames, played faster). Half speed: 0:29.5, still a copy. Keep pitch, Shift pitch or Mute for the sound; Blend builds 885 frames from 442 for smoother slow motion (and re-encodes); Solve fits an exact length — 10 seconds is 1.475x. WebM re-encodes, and it says so before the run. Nothing is uploaded.

Video Speed, every setting, on a 14.7-second 1080p clip with a voice under it. Before anything runs it shows the result: "Export will be 0:07.4 at 2x" and "The picture will be copied, not re-encoded — original quality." At 2x the export is 0:07.4 and still 20.9 MB — the same 442 frames played twice as fast, so a copied file barely shrinks. Half speed is 0:29.5, also a copy. The sound follows the speed: Keep pitch (the default) keeps a voice sounding like itself, Shift pitch lets it drop like a slowed tape, Mute leaves it out. Slowed down, a frame simply stays on screen longer; Blend makes new in-between frames — 885 from 442 at half speed — for smoother motion, and re-encodes the picture. Type a length and press Solve: 10 seconds works out to 1.475x and exports at exactly 0:10.0. Same as source keeps the copy; WebM re-encodes, and the tool says so first. Free: one video up to 100 MB and 5 minutes, 0.25x to 4x. Pro: 0.1x to 20x, batches and a speed per segment. Nothing is uploaded.