How does one import multiple movie captures into a single matrix resembling a print from a photo booth? The trick is to use the dstdimstart and dstdimend attributes of jit.matrix. See Jitter Tutorial 14 – Matrix Positioning.
If you want to drive a slider using the current time information from jit.qt.movie, you can send the ‘gettime’ message into jit.qt.movie to cause the ‘time’ message to come out, and use that to drive the slider.
If you have a 3 plane matrix and a 4 plane matrix, and would like to combine these to create a 7 plane matrix, you would first unpack a multiple matrix into multiple single matrices using the jit.unpack object, and then combine again with the jit.pack object.
Any desired color is produced by blending three primary colors of light: red, green and blue, each with its own intensity. The 4 planes of the matrix in the jit.matrix object are considered the alpha, red, green, blue, planes of the color of each pixel. The planes are numbered starting from 0: alpha=0, red=1, green=2, blue=3. Normally the data in a 4-plane image matrix is of type char, representing numbers from 0 to 255.
This example shows how to automatically retrieve several information data regarding a loaded video on jit.qt.movie. In this case we are taking advance of the message read filename 1 that is output on the second outlet after a successful file load, and using that to trigger several get messages which will also be output out the second outlet and then routed to their proper place using the route object.
This example shows how you can rotate the output of a jit.gradient object. jit.gradient makes a 1-D matrix. You can "stretch" that into a 2-D matrix with jit.matrix and then rotate it with a jit.rota object.
This example shows how to sync data between 2 jit.cellblocks, while being able to have different views/scrolling of the same data, by using either jit.matrix or a coll to store the data.
Storage of large quantities of numerical data is exactly what Jitter is for. You might commonly think of the data in Jitter matrices as representing pixels of a video image, but in fact you can use the jit.matrix object to store any large sets of (multi-dimensional arrays of) numbers, which can be used for any purpose.
This example shows a simple way of putting text into video, with the lines of text stored in a coll object. After loading the video sending a read message to jit.qt.movie, you can load each line by clicking the button in the middle of the patch.
In order to retrieve timecode information from a movie, you can send the message ‘gettimecodeinfo’ and ‘gettimecode’ to query the state of those attributes. The values come out of the right outlet as ‘timecodeinfo’ and ‘timecode’ messages.
‘timecode’ and ‘timecodeinfo’ are gettable attributes (but are not settable).