WebcamGridMovie is a sample app I wrote to gather dynamically generated images into a grid in a movie. It is written with Objective-C and Cocoa.
WebcamGridMovie illustrates how to draw into a NSImage, how to add NSImages to a QTMovie, how to use NSTimer, how to use NSThread, and how to use Core Data. My usage of Core Data is pretty weak in this example. I wanted an easy way to write to a document file and Core Data is about as easy as you can get.
There is no support or warranty for this software. It is as is.
- Add Name/URL pairs by clicking on the 'Add' button. Removing pairs can be done by selecting the pair and clicking the 'Remove' button.
- Each pair will show up in a cell in the movie. The size of the cells are determined by Cell Width and Cell Height. Columns is how many columns in the grid.
- Time Value and Time Scale are for adding each frame to the movie
- Timer is in seconds. How long the software will wait before adding a frame to the movie. The threads that go and get the images do so every 10 seconds regardless of this setting.
- Destination is where the movie will be written to. Also, the software writes a log file. The log file is a tab delimited file that contains an average value for each cell. We wrote the software to find occurrences of bad images - they show up as white.
The zip file includes all the source as well as the working app. Enjoy!
