Any MP4 with slides, scenes, or steps in it can become a deck. Video2Any decodes the .mp4 with WebCodecs right in your browser, catches each meaningful change, and exports an editable PowerPoint. Because the file never leaves the tab, there is no size ceiling from an upload — a big MP4 processes as fast as your machine allows.
The MP4s people actually convert here
MP4 is the default output almost everywhere: phone and camera video, QuickTime, Zoom and Google Meet local recordings, and screen recorders like OBS, Camtasia, and ScreenFlow. Even PowerPoint’s own "Export to video" writes an MP4. If your recording came out of a mainstream app, it is almost certainly an MP4.
That is good news for extraction. Nearly all of those files are H.264/AVC — the codec browsers decode fastest through WebCodecs — so the most common recording format is also the quickest one to turn back into slides.
Why a 3 GB lecture MP4 is not a problem
A long, high-bitrate lecture can run to several gigabytes — the kind of file that stalls or gets rejected by an upload-based converter. Here there is no upload: your browser opens the local .mp4, seeks through it, and spends real work only on the moments where the slide actually changed.
So processing time tracks your CPU and the length of the recording, not your connection speed. A two-hour class MP4 finishes as fast as your laptop can decode it, and none of it ever leaves the tab.
H.264, HEVC, and what your browser can decode
Standard MP4 is H.264/AVC, which every current browser decodes natively. Some newer phones instead record HEVC (H.265) inside an .mp4; whether that decodes depends on your browser and operating system.
If an HEVC file will not open, re-export it as H.264 from the app that made it — most cameras, editors, and screen recorders offer that option — and it processes normally.
- Is there a file-size limit for MP4?
- Uploads are uncapped because there is no upload — your browser reads the file directly, so the only limit is your device's memory.
- What codecs are supported?
- Standard MP4 is H.264/AVC, which decodes natively through WebCodecs — exactly what most screen recorders and cameras produce. HEVC (H.265) MP4s depend on your browser and OS; re-export as H.264 if one will not open.
- Does it work with Zoom or OBS recordings?
- Yes. Zoom and Google Meet local recordings and OBS captures are standard H.264 MP4s — drop them straight in, no conversion first.