[gstreamer-bugs] [Bug 617223] [tags] Add tags for direction of capture and movement
bugzilla at gnome.org
Thu Apr 29 16:26:47 PDT 2010
GStreamer | gstreamer (core) | git
--- Comment #2 from Thiago Sousa Santos <thiago.sousa.santos at collabora.co.uk> 2010-04-29 23:26:42 UTC ---
(In reply to comment #1)
> > GST_TAG_GEO_LOCATION_CAPTURE_DIRECTION (double from 0 to 360 degrees, 0 is
> > geographic north, clockwise)
> This is the direction into which the camera is pointed?
> > GST_TAG_GEO_LOCATION_MOVEMENT_DIRECTION (same).
> Makes sense, but in what scenario is this interesting in a multimedia context?
> When snapshotting/filming out of a train window or something? Or just for
> completeness sake?
Yes, I guess that's the scenario. I looked up those while browsing exif/xmp
spec and thought we should get all those in one go.
> > Meanwhile, we could also have
> > GST_TAG_GEO_LOCATION_MOVEMENT_SPEED (in m/s or km/h?)
> > I don't care about this one, but as we add the movement direction we might also
> > add the speed, right?
> Agreed. I'd go for m/s, it seems more 'neutral' and natural.
This completes the movement direction. And I agree m/s is better.
> The DOP might also be of interest, as an indication how precise the
> lat/long/elev values are, but maybe that value is too GPS-specific?
Exif represents it as a Rational (fraction), wikipedia tells us that it
mathematically defined , so it should be possible to have it. I'll do some
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