Within SeaTube V3, you are able watch and provide annotations for either Live Video (from a dive that is in progress), or Historic Video (video that has been archived for a dive in the past). Toggle between Historic and Live modes by clicking the toggle buttons in the upper-right corner of the SeaTube V3 window.
Note that this feature is only available when a dive is currently in progress; for previously completed dives Historic mode is the only option, so the toggle icons do not appear.
This is the default mode for SeaTube V3 dive video, and active whenever the main SeaTube Annotation window is first opened, whether a current dive is in progress or not.
Upon entry, the Video widget will start playing the archived video from the start of the dive, and any previously entered annotations will appear in the Annotation List widget. All widgets (Map, Annotation List, and Sensor Readings) will highlight the values synced to the current video position time.
You can advance/rewind the video using the provided controls, or click on an annotation in the Annotation List to reset the video to corresponding point in time.
Creating an annotation will by default use a timestamp that corresponds to the current point in time of the video being displayed.
“Capture Time” will capture the current video time; the user may also enter/edit the time to be used using the controls provided.
This mode enables annotation teams to watch a live video feed and create annotations based on what they are witnessing in real-time. By default annotations that are created will utilize the current time for the timestamp (as provided by their personal computer OS).
“Capture Time” will capture the current system time; the user may also enter/edit the time to be used using the controls provided.
During Live mode, the user is not able to click on a previous annotation and watch the video from that point; in order to do so, they must switch to Historic mode.
Given the delays in receiving and re-streaming live video through SeaTube, some organizations (such as NOAA) require annotators to watch a more direct video stream to minimize these delays, but still prefer that the annotation time default to the current system time.
To enable this, the organization will provide a separate video URL for their users to watch in one browser window, while entering annotations via SeaTube V3 in a separate browser window.
To make sure the user is not confused with more than one video stream playing at once, they configure SeaTube V3 to not display any video while in Live mode.
Both NOAA and ONC are working on an enhanced solution that would allow the video time to be embedded directly in the video itself, which will resolve the original issue of the time delays between receiving a video stream and creating an annotation for a precise point in time.