examples.txt

Raspberry Pi camera
  --video-source "libcamerasrc name=videosrc ! video/x-raw,colorimetry=bt709,format=NV12,interlace-mode=progressive,width=1280,height=720"

HDMI grabbers:

--video-source "v4l2src  name=videosrc ! queue max-size-time=4000000000 ! image/jpeg,width=1280,height=720 ! jpegdec"

--video-source "v4l2src  name=videosrc ! queue max-size-time=4000000000 ! image/jpeg,width=1280,height=720 ! jpegparse ! v4l2jpegdec"


Monitors
--monitor waylandsink
--monitor fbdevsink
--monitor glimagesink

Audio

hid-generic 0003:17A0:0305.0005: input,hidraw1: USB HID v1.00 Device [Samson Technologies Samson GoMic] on usb-xhci-hcd.0-2/input3
arecord -l
card 3: GoMic [Samson GoMic], device 0: USB Audio [USB Audio]

--audio-source "alsasrc device=hw:3 provide-clock=false slave-method=re-timestamp name=audiosrc ! queue max-size-time=4000000000"