Pentax K-r Operating Manual page 26

You can record movies using Live View.
You can record movies with a frame rate (number of frames shot per
second) at 25 frames per second (fps), monaural audio, and the file format
set to AVl.
1
2
Select [Movie] in the [1_1Rec. Mode 3] menu and press the
four-way controller (•).
The [Movie]screen appears.
Press the four-way controller
(•), use the four-way controller
(• v) to select the number of
recorded pixels, and press the
OK button.
Sound Iq_}
Cross Processing
Digital Filter _,t_
Movie Aperture Control Fixed
Shake Reduction _)
3
4
Recorded Pixels Pixels t Aspect Ratio
(default setting) 1280x720 16:9
640x480 4:3
Use the four-way controller (• • ) to select [Quality Level]
and press the four-way controller (•).
Use the four-way controller (• •) to select the quality
level and press the OK button.
Select from _ (Best; default setting), _ (Better) and _ (Good).
When the recorded pixels and quality level are changed, the amount of
recordable time at that setting appears at the top right of the screen.