Welcome to the forum.
What is your Project Preset, chosen when you do New Project?
Have you updated both your audio and video driver to the very latest?
Have you updated Apple's QT Player?
What is your system's I/O sub-system, i.e. the HDD's (Hard Disk Drives), their size, speed, controller type, amount of free space on each and how are they allocated?
What is your CPU type/speed?
This ARTICLE might offer tips on gathering clues, as to what is happening on your system and with your application?
This ARTICLE will give you tips on setting up your computer for an editing session.
JVC Everio files have their own unique challenges, and don't seem to work well in any editors except the software that comes with the camcorder.
The FAQs to the right of the forum offer a possible solution, however.
1 person found this helpful
Recently, a poster, Chris at JVC, has added some good info on dealing with MOD files. There are several posts, to which he's replied with tips. I would do a search of this forum for "MOD" and then filter on People and choose Chris at JVC.
Click this link to run the search:
Insanity is hereditary, you get it from your children