How to reverse a time lapse for a creative visual edit
- Step 1Export your time lapse as a single video — Most cameras and apps render the time lapse to an MP4 or MOV already. If you have a folder of stills instead of a rendered video, assemble them into a clip first (in your time-lapse app), then bring the rendered MP4 here.
- Step 2Drop the rendered clip onto the reverser — Drag the MP4/MOV/MKV/WebM onto the drop zone. No settings to choose — JAD reverses the frames so the last frame plays first. The sunset's final dark frame becomes the start; the bright sky becomes the end.
- Step 3Let it process — A typical time lapse (10–30 s) reverses in a single pass to H.264 MP4. A long hyperlapse over 60 s automatically uses the chunked pipeline so the browser does not run out of memory.
- Step 4Check the motion direction — Confirm the reverse reads the way you want: clouds rolling in vs out, traffic flowing one way vs the other. If you want the reverse to also loop back to forward, that is a boomerang — see the merger workflow.
- Step 5Handle audio if present — If your time lapse has ambient audio, it comes back reversed. Most reverse-time-lapse edits use music instead — strip the reversed ambient with the audio-track-extractor and add a track in your editor.
- Step 6Grade and finish — The output MP4 imports cleanly for color grading and music. A reverse sunrise often benefits from warmer grading to sell the dawn look — do that in your editor or with the color grader.
Creative reverse-time-lapse edits
Each transformation is just a reverse of the right source clip.
| Source time lapse | Reversed result | Tip |
|---|---|---|
| Sunset | Sunrise (sky brightens, sun rises) | Warmer grade sells the dawn look |
| Storm clouds gathering | Clouds peel back to clear sky | Pair with music swell |
| Traffic / crowd building | Traffic un-jams, crowd disperses | Great as a transition out of a scene |
| Construction build-up | Structure un-builds piece by piece | Reverse reads as 'deconstruction' |
| Flower opening | Flower closing | Short clip; reverses instantly |
Reverser facts for time-lapse workflows
Fixed encode params and the limits that matter for long hyperlapses.
| Item | Value |
|---|---|
| Output | H.264 MP4, CRF 20, AAC 192 kbps |
| Audio | Reversed (no mute option; usually irrelevant for silent time lapses) |
| Typical time lapse | Short, reverses in the fast single pass |
| Long hyperlapse | Auto chunked above 60 s (8 s segments) |
| Free tier | 1 GB per file, 1 file |
| Pro / Pro-media / Developer | 10 GB / 100 GB / 100 GB per file |
Cookbook
Creative reverse-time-lapse recipes. The reverse itself has no options — the artistry is in choosing the source and grading after.
Sunset becomes sunrise
The signature reverse-time-lapse move. Reverse a sunset so the sky brightens.
Input: sunset_timelapse.mp4 (18 s, sky darkening) Reverse here -> sunrise_timelapse.mp4 Result: sky brightens, sun appears to rise. Tip: add a warm grade to sell the dawn.
Storm clouds peel back
Reverse a gathering-storm time lapse so the clouds retreat to clear sky.
Input: storm_buildup.mp4 (12 s) Reverse -> storm_clears.mp4 Result: ominous clouds roll back to blue sky.
Add music to a reversed time lapse
Most reverse time lapses use music. Strip any reversed ambient audio, then score it.
1. Reverse city_timelapse.mp4 -> city_rev.mp4 (ambient audio reversed) 2. Remove audio (audio-track-extractor) -> city_rev_silent.mp4 3. Add a music track in your editor.
Reverse a long hyperlapse (chunked path)
A long hyperlapse over 60 s auto-routes through the chunked pipeline.
Input: drive_hyperlapse.mp4 (1 min 30 s = 90 s) JAD probes > 60 s -> chunked: split into 8 s chunks (12), reverse each, concat in reverse order Progress: Chunked reverse · 12/12 chunks -> Concatenating chunks Output: drive_hyperlapse_rev.mp4 (90 s reversed, RAM bounded)
Reverse-then-forward time-lapse loop
For a seamless loop, merge the reversed copy with the original.
1. Reverse clouds.mp4 -> clouds_rev.mp4 2. Merge clouds.mp4 + clouds_rev.mp4 -> clouds_loop.mp4 Result: clouds gather, then peel back, looping forever (boomerang). See /video-tools/solutions/create-boomerang-effect-from-mp4
Edge cases and what actually happens
Source is a folder of stills, not a video
Render firstThe reverser works on a rendered video, not a folder of images. Assemble your time-lapse stills into a clip in your camera app or editor first, then bring the rendered MP4/MOV here to reverse.
Time lapse has ambient audio you want kept forward
Not supportedThe reverser reverses both streams; it cannot keep ambient audio forward while reversing the picture. Since most reverse-time-lapse edits use music anyway, reverse here, strip the reversed ambient with the audio-track-extractor, and add a music track.
Long hyperlapse over 60 seconds
By designHyperlapses can run long. Above 60 s the reverse auto-switches to the chunked pipeline (8-second segments reversed and concatenated in reverse order) so the browser heap stays bounded. No action needed.
Reverse looks jumpy at the edit point
Expected for time lapsesTime lapses already drop most frames, so reversing them is smooth within the clip but a hard cut to the next scene can look abrupt. Add a cross-dissolve in your editor, or build a boomerang loop with the merger for a seamless bounce.
Output is MP4 even though the camera wrote MOV
ExpectedReversal is a re-encode, so the result is always H.264 MP4. The MOV is decoded and re-encoded at CRF 20. For grading workflows that prefer MOV, re-package afterward.
Reversed time lapse plays too fast or slow
Use the speed controllerThe reverser does not change duration — the reversed clip is the same length as the source. To retime, run the reversed MP4 through the video-speed-controller.
Very high-resolution (4K/8K) time lapse
Mind memoryThe single-pass reverse buffers frames; very high-resolution clips above 60 s lean on the chunked path. If a short 8K clip strains the browser, trim it slightly so it stays comfortably under the memory ceiling, or split and reverse in parts.
File larger than the tier cap
RejectedFree caps at 1 GB, Pro at 10 GB, Pro-media and Developer at 100 GB. A long high-bitrate hyperlapse over the cap is rejected before processing — compress the export or upgrade the tier.
Frequently asked questions
Can I turn a sunset into a sunrise?
Yes — that is the signature reverse-time-lapse effect. Reverse your sunset clip here and the frames play back-to-front, so the sky brightens and the sun appears to rise. Add a warm color grade to sell the dawn look.
Does the reverser work on a folder of time-lapse photos?
No — it reverses a rendered video, not stills. Assemble your photos into a clip in your camera app or editor first, then bring the rendered MP4 or MOV here to reverse.
My time lapse has ambient sound — what happens to it?
It comes back reversed, because the reverser always reverses audio (areverse). Most reverse time lapses use music instead, so reverse here, strip the reversed ambient with the audio-track-extractor, and score it in your editor.
Will my footage be uploaded?
No. The reverser runs FFmpeg.wasm in your browser tab. Your time-lapse footage and the reversed result stay on your device.
What format do I get back for grading?
An H.264 MP4 at CRF 20 with AAC audio. It imports cleanly for color grading and music. If your pipeline prefers MOV, re-package after reversing.
Can I reverse a long hyperlapse?
Yes. There is no length limit. Above 60 seconds the reverse auto-switches to a chunked pipeline (8-second segments reversed and concatenated in reverse) so the browser stays within memory.
Does reversing change how fast the time lapse plays?
No — the reversed clip is the same length as the source. To retime it (faster or slower), run the reversed MP4 through the video-speed-controller.
How do I make the time lapse gather then peel back in a loop?
Build a boomerang: join the forward time lapse with its reversed copy in the video merger. The clouds gather, then peel back, looping seamlessly. See the boomerang recipe.
Will reversing reduce my time-lapse quality?
One generation of re-encoding happens at CRF 20 (near-lossless visually). Reverse before grading rather than after to avoid stacking re-encodes.
Can I reverse a 4K time lapse?
Yes, within your tier's file-size cap (1 GB Free, 10 GB Pro, 100 GB Pro-media/Developer). Long high-resolution clips use the chunked path so memory stays bounded.
Is there a watermark on the output?
No — JAD never watermarks output, so the reversed time lapse is clean for delivery.
Why is the output MP4 when I uploaded a MOV?
Reversal is a full re-encode, and JAD always writes H.264 MP4. The MOV is decoded and re-encoded at CRF 20. Re-package to MOV afterward if your delivery requires it.
Privacy first
Every JAD Video tool runs entirely in your browser via WebCodecs and FFmpeg (WebAssembly). Your video files never leave your device — verified by zero outbound network requests during processing.