Why is the first run slow?

ffmpeg.wasm is about 25 MB and is downloaded once on first use, then cached for instant subsequent runs.

Does the MOV preserve the original frame rate?

Yes — the GIF's frame timing is honoured. ffmpeg pads odd dimensions by one pixel so H.264 encoding never fails on quirky sizes.

將動態 GIF 轉為 QuickTime MOV 檔 — H.264 編碼置於 .mov 容器內。

100% client-side · ffmpeg.wasm · no upload

Animated GIF

Quality (CRF) Use yuv420p (broad compatibility)

Pick a GIF file to begin.

Final Cut Pro / Premiere import — MOV is honoured as a video clip, unlike GIF.
Keynote slides that need a looping animation segment.
Avoid GIF banding in motion-heavy reaction clips.

Why is the first run slow?: ffmpeg.wasm is about 25 MB and is downloaded once on first use, then cached for instant subsequent runs.
Does the MOV preserve the original frame rate?: Yes — the GIF's frame timing is honoured. ffmpeg pads odd dimensions by one pixel so H.264 encoding never fails on quirky sizes.

Last updated: 2026-05-20 By jarvisbox