MSE playback init
Devices & provisioning
MSE playback init
GET
MSE playback init
Authorizations
JWT access token. Paste the token only; the Bearer prefix is added automatically.
Query Parameters
Session ID (UUID)
Response
OK
InitBytesB64 is the base64-encoded ftyp+moov prefix from segment 0. The client appends this to a SourceBuffer before queueing media segments.
MimeType is the full codecs string (e.g. video/mp4; codecs="avc1.640029").
SessionFirstNtpNs / SessionLastNtpNs are the session's NTP wall-clock bounds in nanoseconds, used by the UI to set playback slider extents.
Timescale is the video track's media timescale (units per second).