What is a Media Object Timeline

Each spatial annotation will have a timestamp that fits within a media object timeline, which is the span of the first and last frames. In this guide, we will explain how that works.

👩‍🔬Prerequisite knowledge: to make the most of this guide it will help to be familiar with record media and timecodes

 

Contents


Example 1

As n example, let's say we have a video with no start timecode (Timecode of first frame), this will default to 10:00:00:00 in Imagen:

👩‍🎓Pro tip: "Timecode of first frame" is used to describe the start timecode. Media info can be used to find this timecode

Start Timecode
Hours Minutes Seconds Frames
10 00 00 00
 

If our video is 10 minutes long, the end timecode will be 10:10:00:00:

End Timecode
Hours Minutes Seconds Frames
10 10 00 00

Media Object Timeline

Our media object timeline must therefore be:

Start timecode 10:00:00:00
End timecode 10:10:00:00
Duration (timecode) 00:10:00:00
Duration - Frames @30fps 18,000

Review

All annotations must fit within this media object timeframe. Here are a few examples for review:

Annotations
10:05:00:00

Good

Inside timeline
10:06:17:04 Good Inside timeline
11:05:00:00 Bad 1 hour after the end of the video
10:10:30:00 Bad 30 seconds after the end of the video

 


Example 2

In our second example, we have a start timecode of 13:24:06:00

Start Timecode
Hours Minutes Seconds Frames
13 24 06 00

If our video is 1 hour, 14 minutes and 28 seconds long, the end timecode will be 14:38:34:00:

End Timecode
Hours Minutes Seconds Frames
14 38 34 00

Media Object Timeline

Our media object timeline must therefore be:

Start timecode 13:24:06:00
End timecode 14:38:34:00
Duration (timecode) 1:14:28:00
Duration - Frames @30fps 134,040

Review

All annotations must fit within this media object timeframe. Here are a few examples for review:

Annotations
13:44:00:12 Good Inside timeline
14:01:59:13 Good Inside timeline
14:44:34:16 Bad 6 minutes and 16 frames after the end of the video
14:38:35:00 Bad 1 second after the end of the video

📕Further reading: Follow this link to find out more about adding Annotations