Capture sVideo and audio with the USB Easycap 2.0

https://github.com/stevelacy/EasyCap - make... make install

./somagic-extract-firmware SmiUsbGrabber3C.sys
(the .sys file can be obtained either from the win32 install kit or https://github.com/stevelacy/EasyCap/blob/master/somagic-easycap-tools_1.1/SmiUsbGrabber3C.sys)

cp somagic_firmware.bin /usr/lib/firmware/

somagic-init -f /usr/lib/firmware/somagic_firmware.bin && somagic-capture -n -s --sync=1 --iso-transfers 80 | ffmpeg -f rawvideo -pix_fmt uyvy422 -s 720x480 -y -an -r ntsc -i - -f pulse -i default -aspect 4:3 -qmin 1 -qmax 10  output.avi