What does reversing a video actually do?

It plays every frame in reverse order, starting from the last frame and ending at the first. The total duration stays the same, but the action runs backwards — useful for boomerang effects and creative transitions.

Can I reverse only the audio or only the video?

Yes. Three options are available: reverse both tracks together for a true backwards playback, reverse only the video while keeping audio forward, or reverse only the audio for an eerie effect on top of normal-looking footage.

Why does reversing take so long?

Reversing requires ffmpeg to first read every frame into memory, then write them out in reverse order. Long or high-resolution videos may temporarily exceed your browser memory — try trimming first if you only need a short segment.

Will the reversed video have the same quality?

The video is re-encoded with the default H.264 ultrafast preset, which is visually near-lossless for most use cases. For pixel-identical preservation, consider doing the reverse once and avoiding multiple re-encodes.

Will my video upload during reversal?

No. ffmpeg.wasm processes everything inside your browser via WebAssembly — the file never leaves your device.

Is there a length limit?

There is no hard limit, but browser memory caps practical reversal at around 1–2 minutes for 1080p content. For longer clips, trim first or run the operation in shorter chunks.

倒轉影片

倒著播放影片片段 — 影像與聲音可同時倒轉,或僅倒轉影像。

100% client-side · no upload

Video file (MP4, WebM, MOV…)

Load a video file to begin.

How to reverse a video

Select your video file — short clips work best.
Choose what to reverse: both tracks, video only, or audio only.
Click Reverse video and wait for ffmpeg.wasm to process every frame.
Download the reversed MP4.

Common use cases

Boomerang loops: Reverse a clip and stitch it after the original for a forward-then-backward effect.
Magic tricks: Film an object falling, then reverse for an apparent gravity-defying rise.
Reveal animations: Reverse a wipe or erase animation so it appears to draw itself.
Audio-only spooky effects: Keep visuals normal while reversing dialogue or music for surreal soundtracks.

Related tools: Video Trimmer · Video Speed Changer · Video Muter · Video Rotator

常見問題

What does reversing a video actually do?: It plays every frame in reverse order, starting from the last frame and ending at the first. The total duration stays the same, but the action runs backwards — useful for boomerang effects and creative transitions.
Can I reverse only the audio or only the video?: Yes. Three options are available: reverse both tracks together for a true backwards playback, reverse only the video while keeping audio forward, or reverse only the audio for an eerie effect on top of normal-looking footage.
Why does reversing take so long?: Reversing requires ffmpeg to first read every frame into memory, then write them out in reverse order. Long or high-resolution videos may temporarily exceed your browser memory — try trimming first if you only need a short segment.
Will the reversed video have the same quality?: The video is re-encoded with the default H.264 ultrafast preset, which is visually near-lossless for most use cases. For pixel-identical preservation, consider doing the reverse once and avoiding multiple re-encodes.
Will my video upload during reversal?: No. ffmpeg.wasm processes everything inside your browser via WebAssembly — the file never leaves your device.
Is there a length limit?: There is no hard limit, but browser memory caps practical reversal at around 1–2 minutes for 1080p content. For longer clips, trim first or run the operation in shorter chunks.

Last updated: 2026-05-20 By jarvisbox

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