399 — Mp4

It provides better visual quality at a lower bitrate than the older H.264 (AVC) codec.

Supports up to 60fps (High Frame Rate/HFR), offering smoother playback for action-heavy content. 399 mp4

AV1 ( av01 ), which is a modern, royalty-free codec designed for better compression and quality compared to older formats. It provides better visual quality at a lower

(In this example, 399 is the 1080p AV1 video and 140 is the standard M4A audio stream.) Why Choose 399? which is a modern