Panasonic LUMIX S5IIX Operating Instructions Manual page 467

HDMI Output (Video) – HDMI Output Image Quality
•
When set to a [Rec Quality] other than 16:9 or 17:9, bands are added to the
images and they are output with a 16:9 aspect ratio.

[iA]/[P]/[A]/[S]/[M] Mode
Output is the same as [
Output is with a 16:9 aspect ratio during recording standby. Resolution,
frame rate, YUV, and bit value output matches the connected device.
•
When set to any [Aspect Ratio] other than 16:9, bands are added to the images
and they are output with a 16:9 aspect ratio.
]/[S&Q] mode during video recording.
467