Guide
How to merge a Snapchat overlay into a video
A downloaded Snapchat video can look unfinished: the MP4 is clean, while its caption, location sticker or drawing sits in a separate PNG. To get back the video you remember, that PNG has to be composited over every frame. Here's what the two files are, why dragging them into Photos does not work, and how to restore them as one video.
What the separate Snapchat video overlay files are
Snapchat Memories exports often split a decorated video into a base file such as 2024-10-31_uuid-main.mp4 and a matching 2024-10-31_uuid-overlay.png. The MP4 holds the moving picture and audio; the transparent PNG holds the text, stickers, filters or drawings that appeared on top. The shared name before -main and -overlay is what connects the two.
The dark or black square you may see when opening the PNG is usually only your viewer's background behind transparent pixels. The overlay is not a second video and it is not meant to play on its own. It needs the matching MP4 beneath it.
Why a video needs more than a photo-overlay merge
A photo can be flattened once. A video overlay must be placed at the correct size and position across the whole moving stream, while the original audio and duration are kept intact. That means creating a new video file rather than attaching the PNG beside it. Doing this one clip at a time in an editor is possible, but not practical for a Snapchat export with hundreds of matched pairs.
Merge Snapchat video overlays with the desktop app
- Keep every downloaded export part together. Do not rename the
-mainor-overlayfiles; their matching names let the app pair them automatically. - Open the export folder or all of its ZIP parts in the MemoriesExport desktop app for Mac or Windows, then enable the captions and stickers option.
- The app composites each matching PNG over the full video, keeps the source file intact, and creates a separate ready-to-import MP4. It also restores the capture date and GPS from your export's manifest.
What the finished video contains
The result is a new H.264/AAC MP4 with the overlay baked in for its full duration, including the original audio when present. Because baking an overlay requires a re-encode, it is intentionally done locally in the desktop app rather than in the online flow. Your raw -main video is left alone, so you retain both the clean source and the restored version.
The same run writes the date and location back into the video too, including the QuickTime GPS field Apple Photos uses for videos. Read more about restoring video locations or see the broader Snapchat overlay merge guide for photos and videos.
Get the desktop app for video overlays →
Frequently asked questions
- Can I merge a Snapchat overlay into a video?
- Yes. A matching Snapchat overlay PNG can be composited over every frame of its base video, giving you one MP4 with the caption, sticker or drawing visible throughout. In MemoriesExport, this runs in the Mac and Windows desktop app.
- Why is my Snapchat video caption a separate PNG file?
- Snapchat exports the clean base video and its caption, stickers or drawings as separate layers. The transparent PNG is the visual layer; a photos app cannot place it over the matching video by itself.
- Does merging a Snapchat video overlay change the video?
- It has to be re-encoded to bake the overlay into every frame. MemoriesExport keeps the source video unchanged and creates a separate H.264/AAC MP4, then writes the corrected capture date and GPS into that new file.
- Can I merge video overlays in the browser?
- MemoriesExport's browser route merges photo overlays. Video-overlay merging is available in the Mac and Windows desktop app, where the CPU-intensive re-encode runs locally and your media stays on your computer.