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Is there a way for an FXPlug to access the Source audio? Or do we need to make an AU plugin, apply it to a audio source [both video or audio track], and feed the info via shared memory to an FXPlug? Is there an AU plugin for external processes to "listen" to the audio?

Namaste! I'm putting together a FCPX Effect that is supposed to increase the resolution with AI upscale, but the only way to add resolution is by scaling. The problem is that scaling causes the video to clip. I want to be able to give a 480 video this "Resolution Upscale" Effect and have it output a 720 or 1080 AI upscaled video, however both FxPlug and Motion Effects does not allow such a thing. The FxPlug is always getting 640x480 input (correct) but only 640x480 output. What is the FxPlug code or Motion Configuration/Cncept for upscaling the resolution without affecting the scale? Is there a way to do this in Motion/FxPlug? Scaling up by FxPlug effect, but then scaling down in a parent Motion Group doesn't do anything. Setting the Group 2D Fixed Resolution doesn't output different dimensions; the debug output from the FxPlug continues saying the input and output is 640x480, even when the group is set at fixed resolution 1920x1080. Doing a hierarchy of Groups with different settings for 2D Fixed Resolution and 3D Flatten do not work. In these instances, the debug output continues saying 640x480 for both input and output. So the plug in isn't aware of the Fixed Resolution change. Does there need to be a new FxPlug property, via [properties:...], like "kFxPropertyKey_ResolutionChange" and an API for changing the dest image resolution? (and without changing the dest rect size) How do we do this?