Samsung NX1000 User Manual page 55

In Movie mode, you can shoot videos in Full High Definition (1920X1080)
and capture sound via the camera's microphone.
In order to adjust the exposure level, you can select Program in the
Movie AE Mode options menu so that the aperture value and shutter
speed can be automatically set or select Aperture Priority to manually
set the aperture value, You can also select Shutter Priority to manually
set the shutter speed or select Manual to manually set both the
aperture value and shutter speed. While shooting a video, press [.&F] to
activate or deactivate the AF function.
Select Fader to fade in or out a scene. You can also select Voice to
mute or un-mute voice.
The camera lets you capture video files up to 25 minutes in length at
30 or 24 fps, and saves the files in MP4 (H.264) format. 24 fps is
available only with 1920X810.