Sony DSC-RX100M4 Instruction Manual page 223

[189] How to Use
REC Control (movie)
If you connect the camera to an external recorder/player, you can remotely command the
recorder/player to start/stop recording using the camera.
1. MENU →
Menu item details
On:
The camera can send a recording command to an external recorder/player.
The camera is sending a recording command to an external recorder/player.
Off:
The camera is not able to send a command to an external recorder/player to start/stop
recording.
Note
Available for external recorders/players compatible with [
When [ TC Output] is [Off], [
Even when
depending on the settings or status of the recorder/player. Check if the external
recorder/player works properly before use.
[190] How to Use
HDMI Audio Out. (movie)
When the camera is connected to an external device such as a television via an HDMI cable
(sold separately), the audio picked up by the camera's microphone is output to the external
device during movie shooting and standby mode. During shooting, you can check both the
image and sound from the external device.
Standby for movie shooting
This is the state before you start movie shooting by pressing the MOVIE button, after turning
the mode dial to
icon "STBY" is displayed on the screen.
Changing settings
(Setup) → [HDMI Settings] → [
REC Control] is set to [Off].
is displayed, the external recorder/player may not work properly
Changing settings
(Movie) and setting the values for shutter speed and aperture. The
Setup menu
REC Control] → desired setting.
Setup menu
REC Control].