I put together a motion patch for production release 3.2.11 to handle streaming from an Acti ACM-1231 camera
The protocol works similar to the netcam_url 'mjpg' chunked format. After logging in with a 128byte exchange
to, and then again from the camera, the camera starts sending pairs of 44byte image header and jpeg file data.
It's a somewhat crude patch because it lacks comments and such to make it go directly into motion. However
perhaps it will inspire someone to do something more with it, so that it can become an official working device.
At the moment it is listed now in the non-working devices at the wiki, with a link to the patch.