```
➜  ~ v4l2-ctl --list-devices
MT8195 video decoder (platform:18000000.video-decoder):
	/dev/video2
	/dev/media0

MT8195 video encoder (platform:1a020000.video-codec):
	/dev/video3

mtk-jpeg-dec (platform:soc:jpgdec-master):
	/dev/video0

mtk-jpeg-enc (platform:soc:jpgenc-master):
	/dev/video1

ACER HD User Facing: ACER HD Us (usb-112a0000.usb-1):
	/dev/video4
	/dev/video5
	/dev/media1
```
`v4l2-ctl` can see the video decoder device