atem: outputs

Generated from the command table (internal/table); do not edit. After changing a table, run go generate ./cmd/bmdctl.

Multiviewers, SuperSource, recording and streaming.

COMMANDS.md says how to read an entry, and lists the flags every command takes and the built-in commands.

bmdctl atem multiviewer input <window> <source>

Route a source to a multiviewer window.

bmdctl multiviewer input 3 cam5
bmdctl multiviewer input 10 aux1 --multiviewer 2

Unverified. Echo: MvIn:<multiviewer>:<window>.

argument	value
<window>	uint, 1-256, counted from 1	required	window
<source>	source, 0-65535	required	source id or input name
--multiviewer	uint, 1-256, counted from 1	default 1	multiviewer

bmdctl atem multiviewer properties

Set a multiviewer's layout and program/preview swap.

bmdctl multiviewer properties --swap
bmdctl multiviewer properties --layout 12 --multiviewer 2

Unverified. Give at least one flag. Echo: MvPr:<multiviewer>.

argument	value
--multiviewer	uint, 1-256, counted from 1	default 1	multiviewer
--layout	uint, 0-255, 4-bit field: bit N splits quadrant N	optional	layout
--swap	bool	optional	swap program and preview

bmdctl atem recording settings

Set the recording file name and disks.

bmdctl recording settings --filename service-2026-10-11
bmdctl recording settings --in-camera

Unverified. Give at least one flag. Echo: RMSu.

argument	value
--filename	string, up to 128 bytes	optional	file name
--disk1	uint, 0-4294967295	optional	first disk
--disk2	uint, 0-4294967295	optional	second disk
--in-camera	bool	optional	record in the cameras too

bmdctl atem recording state <recording>

Start or stop recording.

bmdctl recording state on

Unverified. Echo: RTMS.

argument	value
<recording>	bool	required	recording

bmdctl atem streaming audio-bitrate <min> <max>

Set the streaming audio bitrate.

bmdctl streaming audio-bitrate 128000 192000

Unverified. Echo: STAB.

argument	value
<min>	uint, 0-4294967295, bit/s	required	lowest
<max>	uint, 0-4294967295, bit/s	required	highest

bmdctl atem streaming service

Set the streaming service.

bmdctl streaming service --name YouTube --key abcd-1234-efgh-5678
bmdctl streaming service --url rtmp://a.rtmp.youtube.com/live2
bmdctl streaming service --bitrate-min 4500000 --bitrate-max 6000000

Unverified. Give at least one flag. Echo: SRSU.

argument	value
--name	string, up to 64 bytes	optional	service name
--url	string, up to 512 bytes	optional	server URL
--key	string, up to 512 bytes	optional	stream key
--bitrate-min	uint, 0-4294967295, bit/s	optional	lowest bitrate (with --bitrate-max)
--bitrate-max	uint, 0-4294967295, bit/s	optional	highest bitrate (with --bitrate-min)

bmdctl atem streaming state <streaming>

Start or stop streaming.

bmdctl streaming state on

Unverified. Echo: StRS.

argument	value
<streaming>	bool	required	streaming

bmdctl atem supersource box <box>

Set a SuperSource box.

bmdctl supersource box 1 --source cam1 --enabled
bmdctl supersource box 2 --source cam2 --x 800 --size 500
bmdctl supersource box 2 --masked --left 4000 --right 4000

Unverified. Give at least one flag. Echo: SSBP:<supersource>:<box>.

argument	value
<box>	uint, 1-4, counted from 1	required	box
--supersource	uint, 1-256, counted from 1	default 1	SuperSource
--enabled	bool	optional	box on
--source	source, 0-65535	optional	source
--x	int, -32768 to 32767, -4800-4800	optional	x
--y	int, -32768 to 32767, -3400-3400	optional	y
--size	uint, 0-65535, 70-1000	optional	size
--masked	bool	optional	crop on
--top	uint, 0-65535, 0-18000	optional	crop top
--bottom	uint, 0-65535, 0-18000	optional	crop bottom
--left	uint, 0-65535, 0-32000	optional	crop left
--right	uint, 0-65535, 0-32000	optional	crop right

bmdctl atem supersource properties

Set SuperSource's art fill, key and layer.

bmdctl supersource properties --fill-source mp1 --key-source mp1k
bmdctl supersource properties --layer foreground --premultiplied

Unverified. Give at least one flag. Echo: SSrc:<supersource>.

argument	value
--supersource	uint, 1-256, counted from 1	default 1	SuperSource
--fill-source	source, 0-65535	optional	art fill source
--key-source	source, 0-65535	optional	art key source
--layer	enum, 0-255: background=0 foreground=1	optional	art layer
--premultiplied	bool	optional	pre-multiplied key
--clip	uint, 0-65535, 0-1000	optional	clip
--gain	uint, 0-65535, 0-1000	optional	gain
--invert	bool	optional	invert the key