P748 VIDEO
P748
SETUP
DROP VIDEO FILE
We read the first bytes only • no upload
FILE
—
SIZE
—
TYPE
—
EXT
—
HEADER
—
RESULTS
STATUS
READY — LOAD FILE
CONTAINER
—
BRAND
—
LIKELY
—
DURATION
—
CHECK
canPlayType()
MP4(H264)
—
WEBM(VP8)
—
WEBM(VP9)
—
OGG
—
HLS
—
HELP
HOW IT WORKS
Reads magic bytes from the file header.
Example: MP4 has “ftyp”, WebM has EBML.
No upload • runs locally.
WHAT IT CAN’T DO
It can’t reliably list codecs for all files.
Container ≠ codec (MP4 may contain H.265 etc).
Use a desktop tool for full codec metadata.
PLAYBACK CHECKS
canPlayType() is only a “support hint”.
A file may still fail due to profile/level.
Try another browser/device if needed.
SHORTCUTS
SPACE = scan (PAGE 1)
ESC = return to PAGE 1
On phone, use SETUP / RESULTS tabs.