native MJPEG stream on MAC

Hi I am trying to use a rust binding to openpnp-capture to record video frames from an usb 4k camera on mac (M2). Without any problem I was able to get RGB frames but cannot find out how to access raw jpg images coming from the device. I noticed in the code that he images are decoded at runtime (using turbojpg? ). How can bypass this and get the raw data?

Kind regards,
Marcin