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Home: Isadora: General: Controlling video footage

snazell New User Jul 2, 2007, 9:05 AM Post #1 of 9 (1115 views) Shortcut Controlling video footage Can't Post What I'm wondering is if there is an actor for video like the Mouse Watcher or Keyboard Watcher that can link up with an actor such as the Movie Player Actor and thereby allow you to control aspects of live footage such as speed or zoom inputs by way of a viewers movement in front of a webcam instead of using a mouse to control this. What I'm basically trying to do is through a webcam allowing a viewer through movement to control video footage such as the speed of it. Any advice would be helpful as I'm relatively new to Isadora. Thanks James

hartsteins Novice Jul 2, 2007, 5:25 PM Post #2 of 9 (1108 views) Shortcut Re: [snazell] Controlling video footage [In reply to] Can't Post Check out MidiWebCam for Mac http://web.mac.com/pierre.couprie/iWeb/Logiciels/midiWebcam.html Directions in freench - very cool program. For Windows - EyesWeb Greg

Mark Coniglio TroikaTronix / Moderator Jul 3, 2007, 6:24 AM Post #3 of 9 (1085 views) Shortcut Re: [snazell] Controlling video footage [In reply to] Can't Post One useful combination: Video In Watcher -> Difference -> Calc Brightness The output of Calc Brightness will vary its value based on the amount of movement seen by the camera. Stillness will give 0, movement a higher number. You will need to scale this output value to get good results though. Best Wishes, Mark - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Mark Coniglio / TroikaTronix Creator of Isadora

mattao Novice Jul 3, 2007, 12:58 PM Post #4 of 9 (1074 views) Shortcut Re: [Mark Coniglio] Controlling video footage [In reply to] Can't Post Using Eyes ++ I suceed in creating a 8 slider controller. Get a webcam. Get a black tissue. Get white items ( I use white stones) (the call me "petit poucet") Point the cam to the tissue and put the height sotnes on it. Link the Video in watcher to Eyes ++. Eyes ++ will catch the height item and give you the vertical position of each one. Link the blobs to midi through a blob reader and you got a 8 slider midi controller ( and it's cheap) I wish i could got more than one cam at once. I succeed too with 16 stones a splitted cam signal and two eyes ++ but its too heavy for my macbook CPU to handle it.

snazell New User Jul 4, 2007, 4:50 AM Post #5 of 9 (1060 views) Shortcut Re: [mattao] Controlling video footage [In reply to] Can't Post Thanks Mattao I understand what you're saying Mattao up until 'Link the blobs to midi through a blob reader and you got a 8 slider midi controller' could you explain more what you mean and how to link the blobs to midi through a blob reader. It sounds really interesting and something I'd really like to explore. Thanks for the reply. James

mattao Novice Jul 4, 2007, 11:57 AM Post #6 of 9 (1050 views) Shortcut Re: [snazell] Controlling video footage [In reply to] Can't Post Hi Snazell, I was essentially reacting to the post mentionning midiwebCam You could do the same inside isadora. See my lil scene there the object velocity in front of the cam control a midi value wich you can link to whatever you want. you could control as well a movie player speed if you please or anything you want. In your case, you can, using isadora's actors do a numerical zoom or simulate a focus effect. It replies to zoom. But the "live footage" part is more difficult I don't think you can control the "speed" of a live footage. I think you can control the fps rate or zoom value of the cam if the cam is fully automatised and can be controlled by midi values. I don't know if such a cam exist. I hope I helped Mat (This post was edited by mattao on Jul 4, 2007, 12:03 PM)

Mixed Ape Novice Jul 6, 2007, 8:25 AM Post #7 of 9 (1028 views) Shortcut Re: [snazell] Controlling video footage [In reply to] Can't Post  Get yourself a wiimote Mixed Ape Blog

agentsimon Novice Jul 7, 2007, 12:56 PM Post #8 of 9 (1005 views) Shortcut Re: [Mixed Ape] Controlling video footage [In reply to] Can't Post Couldn't you put the live cam into a buffer and control its fps from there? simon

Mark Coniglio TroikaTronix / Moderator Jul 8, 2007, 5:17 AM Post #9 of 9 (992 views) Shortcut Re: [agentsimon] Controlling video footage [In reply to] Can't Post Controlling the speed of live footage is difficult, because it's "source speed" is always the same. The buffer probably won't do what you need, and the video delay uses a fixed number of frames. The only suggestion I can give is that you experiment with making a chain of video delay actors, and use a selector actor to select which one is supplying the video. This will allow you to change the delay time on the fly -- don't really know how this will look, but perhaps it is worth an experiement. Best, Mark - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Mark Coniglio / TroikaTronix Creator of Isadora

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