Search options (Page 66 of 135)

You can right click the lines, choose "persistence", uncheck "use default", and check "always visible".
Alternatively, you can do that for all drawings ever from the global preferences in Drawings > Persistence.

From what I gather the persistence feature is one of the main usability issue with drawings and bites newcomers. It's not obvious that it's there or how to use it. Any feedback on improving this is appreciated.

For your scenario you might be interested in the "Posture" tool from the custom tools (long click the Goniometer to make the extra tools appear).

Thanks for the feedback!

@Amus:

Can you be more specific ? Do you have an error message ? Do you see thumbnails of your cameras in the cameras panel ? What camera brands/model do you have ?

I can't reproduce the problem for now. Is there anything special about the videos ?

Can you pinpoint a scenario leading to the loosing of the sync point ?

Thanks

Hi,
Great points.

Have you tried the delay slider ? If you don't care about saving each swing it may be enough.

Ideas about capture-replay scenarios have been floating around.
My fear is that a function only available through a keyboard shortcut will be virtually non-existant to 90% of users.

Barring a unique "most popular" replay scenario, what would be needed is to turn this into a mini macro "language" so you can create a macro command by picking actions like "close capture screen", "open playback screen", "launch last captured file", "close playback screen", "open capture on last used camera", etc.
Obviously this is a different beast altogether, if only to make sure the list of commands is coherent.

Implementing trigger by microphone level would be feasible.
Combined with the delay feature and a new function to specify a preset duration for recording, it could be used to record the full swing by hearing when the ball is hit, without touching the computer…

Le besoin existe car les distorsions de la caméra posent des problèmes pour la précision des mesures et donc impactent toutes les fonctions d'analyse quantitative…
Avec la GoPro3 qui filme en 720p à 120fps ça vaudrait le coup de pouvoir rectifier les images.

Un peu sur le même principe, un stabilisateur de vidéos filmées sans trépied est également possible (en tout cas pour les vidéos sans pan ni zoom). Même topo : la fonction peut être implémentée sans trop de difficultés sur une suite d'images données mais pour faire du temps réel c'est plus compliqué.

I concur on what Chas said regarding zoom and shutter speed if your camera support changing these parameters. If you are using a webcam or similar device, place it so that what you want to see fills most of the image.

If you plan on making measurements, another important aspect is the calibration of the space. To make accurate measurements you should either make sure the camera is perfectly perpendicular to the plane on which you make all your measurements, or use the perspective grid to map a physical rectangle and make the measurements on that plane.

I'll try to do a more in depth post to compare the errors that can be expected from both calibration methods.