Hmm. Difficult. I think the preset in Avid xpress pr hd is 23.98.
Try setting the 1200 to 59.98 sytem freq and then capture. If you have in-camera sound, there should be no problem. I think it’s also possible with external sound. Just check the avid manuals. If you shoot film in ntsc land it’s the same. Telecined tapes are on 23.98 and sound is in 24. I’m sure there is a workflow for this.
Avid takes only variable fram rates of 60 fps or 30 fps into 23.98 projects and converts it. If you had other frame rates you have to go over the panasonic frame rate converter.
On my project I converted all variable fps shots to 25p (24p in your case).
Greets