Video volumes

[mzur]

Some users have a video annotation workflow similar to the image annotation workflow where lots of (short) videos need to be annotated. The following features would facilitate this workflow:

• Whole video labels (like image labels)
• Skipping back and forth through videos in the video annotation tool
• A video overview (like the volume overview) where videos can be browsed, sorted, filtered and labelled

My idea to solve this would be the introduction of "video volumes" as an alternative to single videos. Video volumes are collections of videos just like (image) volumes are collections of images. If added, we need to rename "volumes" to "image volumes" to avoid confusion. Video volumes are displayed in the list of videos on the project overview next to regular (single) videos. If a video volume is clicked, the video volume overview is opened, which is analogous to the image volume overview (including sorting, filtering and setting of video labels but minus features such as Largo, MAIA, ...). There, videos can be browsed and a click on the video opens the video annotation tool. If a video belongs to a video collection, the video annotation tool displays controls to switch to the previous/next video.

[mzur]

We agreed to implement video volumes as a replacement for single videos. Old single videos should be put into a "default" video volume during the migration.

[mzur]

Instead of video volumes as a new model, the existing volumes could be extended to have either the type "image" or "video". Image volumes would have some more features but everything else would be handled the same. Maybe it makes sense to resolve biigle/core#191 first?

[mzur]

Plan/Notes:

• [x] Implement volumes that can contain videos
  • [x] The media type can be used for the new volume types "image" and "video", discarding the old types ( #179 )
  • [x] The create volume view must show two different variants, one for an image volume and one for a video volume
  • [x] The video volume overview must support filtering and sorting
  • [x] The video annotation view must support cycling through videos of a video volume (in the active sorting and filtering of the volume overview)
  • [x] Video volumes must support annotation sessions
  • [x] Video volumes can be shared between projects like image volumes
  • [x] The "edit" and "reports" tabs are moved from the video annotation tool to the video volume overview
  • [x] The URLs could be changed from annotations/:id and videos/:id to images/:id/annotations and videos/:id/annotations. The old URLs must remain valid for the time being (redirecting to the new ones).
  • [ ] Thumbnails for videos and images should be stored in the same storage disk ( #279 )
  • [x] The video annotation tool should show a warning message if a video has not been processed (i.e. no MIME type and size are set)
  • [x] The video annotation tool should show an error if the video was found invalid by the processing job (e.g. not found, wrong MIME type/codec, malformed)
  • [x] The new volume browser should show only image or video files depending on the media type that is selected for the new volume
• [x] Implement (whole) video labels
  • [x] The video volume overview must support the new video labels (attaching, detaching, filtering)
  • [x] The video annotation view must support the new video labels (as a new tab)
  • [x] Restrict deletion of labels and label trees if they are used for video labels
• [ ] Update the layout of the project overview ( #278 )
• [ ] Implement video metadata ( #264 )
• [x] Update modules
  • [x] Project reports must distinguish between reports for all image volumes and reports for all video volumes (rename "annotation report" to "image annotation report")
  • [x] Video reports must work with annotation sessions
  • [x] The project geo map and project Largo also work only on image volumes of the project
  • [x] The laser point detection, export area, example annotations, geo module, Largo, color sort and MAIA are disabled for video volumes
  • [x] A new video label report type must be implemented
  • [x] The volume im-/export of biigle/sync must support video volumes and video labels.
  • [x] biigle/demo must be updated to support video volumes.
  • [ ] largo, reports and geo must be compatible with the new (experimental) project overview layout ( #278 )
• [x] Update the manual
  • [x] "Volumes" must be renamed to "image volumes" everywhere
  • [x] "Annotations" must be renamed "image annotations" everywhere
  • [x] Add a video labels manual article or update the image labels article