437.mp4 -

: Instead of requiring the file to be "finalized" at the end, fMP4 splits the video into smaller, independently decodable segments called "fragments". If a crash occurs, everything recorded up to that moment is preserved.

: It generally works best with standard codecs like H.264 or H.265; more specialized formats may still require standard MP4 containers for full compatibility. Writing an MP4 Muxer for Fun and Profit - OBS Studio 437.mp4

While highly useful, this feature has a few limitations depending on your tools: : Instead of requiring the file to be

Traditionally, recording directly to a "standard" MP4 was extremely risky; if your computer crashed or lost power before the recording finished, the entire file would be corrupted and unrecoverable. Key Feature: Fragmented MP4 (fMP4) Writing an MP4 Muxer for Fun and Profit

The most significant and interesting feature regarding modern MP4 usage is the introduction of , specifically within recording software like OBS Studio .