5.3K video
Also known as: 5.3K, 5312 x 2988, GoPro 5.3K
A video resolution of 5312 x 2988 pixels in 16:9, the top mode on recent GoPros. About 91 percent more pixels than 4K, leaving room to crop and pull stills.
Updated
What it means
5.3K is the highest standard video resolution on GoPro cameras from the HERO9 Black onward: 5312 by 2988 pixels in a 16:9 frame. That is about 15.9 million pixels per frame, roughly 91 percent more than 4K UHD, and close to the resolution of a decent still photo.
Few people watch anything at 5.3K, and that is not the point. The extra pixels are headroom. You can crop into a shot, straighten a horizon, or reframe around a rider and still deliver a sharp 4K or 1080p result, and individual frames are good enough to pull as stills.
How it works in practice
On recent models such as the HERO11, 12 and 13 Black, 5.3K is available at up to 60 fps, and there is also a taller 8:7 version that uses the full sensor. It is recorded only in HEVC, at bitrates of roughly 100 to 120 Mbps, which works out to around 45 to 55 GB per hour.
A common approach is to shoot 5.3K for scenic and slower moments where you may crop or want stills, and drop to 4K at 120 fps for jumps you plan to slow down. HyperSmooth stabilization works in 5.3K on current models, so you do not have to give up stabilization for resolution.
What to watch out for
5.3K is the heaviest footage most action-camera owners will handle. HEVC at this size can stutter on laptops that cope with 4K, so check playback before a big edit or use proxies. Storage fills fast, and a card that is not rated V30 or better can stop recording mid-run.
Heat is the other limit. 5.3K at 60 fps drains batteries quickly and is more likely to trigger an overheating shutdown when the camera sits still in the sun, so mount it where it gets airflow or use a lower frame rate for long static shots. And since most viewers watch at 4K or below, 5.3K only pays off if you actually crop or reframe.
How RawClip handles it
RawClip accepts 5.3K uploads directly, together with 4K and 1080p clips from the same or other cameras. Upload the GX files as they came off the card; the AI picks the peak moments, and the finished highlight is delivered as MP4 in 4K and 1080p, the sizes people actually watch.