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video segment annotation

edited 3:22AM in Feedback
I would like to ask if it is possible to define and annotate video segments. That is, to have an mpeg-7 like hierarchy with videos and shotgroups (themes), each having its own annotation.
Is it also possible to define multiple segmentations (each segment having its own annotation) for videos?
If a tool is provided for segmentation, is it frame accurate?
Thank you,
Spiros Ioannou
Hellenic National Audiovisual Archive
IT Manager


  • You can annotate media in the object representation editor. This is accessible by clicking on the "edit metadata" link for a media representation in the object editor.

    Each annotation has an in and out point, can have arbitrary metadata attached – just like any other type of item in CA – and can have relationships to vocabularies and authorities (eg. entities, places, collections, etc.). You will have to configure it how you want though as the default configuration is quite basic.

    As for frame accuracy, time code is stored internally as fractional seconds and so it is not perfectly frame accurate. This could be changed (eg. we could start storing frame count and timebase), but for digital video fractional seconds has proven perfectly usable.

    Let us know if you need any changes.

  • Thank you for your reply seth, I will try it out.
  • edited January 2018
    Sorry for necroposting.
    Following Seth's instructions, it's possible to enter start/end time for an annotation.

    But this is quite error-prone (and uncomfortable) to work with in practice.
    Is there any way of setting markers/ranges while seeing the video?

    Forget this post.
    I just found the "other" annotation option for video - where in/out regions can be set while seeing the video. Sorry.
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