Function frame_meta 

pub fn frame_meta(
    frame: &Frame,
    seq: u64,
    hasher: &FrameHasher,
    arrived: Instant,
    now_epoch_us: u64,
) -> FrameMeta

The metadata of frame, the seq-th of the stream: its hash leaves the status bar out; its capture time is its arrival minus the lag the emulator’s timestamp shows, at most a second.