Panasonic Lumix DMC-GX7 Operating Instructions For Advanced Features page 234

Motion Picture
•
The picture aspect ratio will be fixed to [16:9].
Not available in these cases:
•
Simultaneous recording is not possible in the following cases:
–
When [Rec Format] is set to [VGA/25p] in [MP4]
–
When the [FHD/24p] is set [only when [
–
When [Ex. Tele Conv.] in the [Motion Picture] menu is set to [ON] [only when [
picture priorities) is set]
] (still picture priorities) is set]
234
] (still