With midi or audio you can send Pd a message on load which you get either with [get-midi-dialog] and [get-audio-dialog] or by connecting [r pd] to [print], then go to midi/audio settings and press ok. This gives you the message you have to send so you can use these settings immediately (say, if you use pd -nogui).

What about using a camera other than the built-in? You can set that by sending [dialog( to [pix_video], but is it possible to set it by sending Pd a message? If so, where do you get this message from?

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