try the example in 02.advanced/09.SnapshotSave.pd - hit the big bang to have it write a file to the pd/bin directory (not /tmp/gemshot). that patch can be simplified by just banging the pix_write object for each frame after initialization. you can use the render_trigger object to have the capture occur every time the render chain is run or you can do async capture using a metro.
strange, this example is missing in my docs ??
got dv-in working. thanx, j.