Webcam trouble with octoprint

[Creative Live! Cam Sync HD (VF0770)

i cant get the camera to auto start on boot,if i run

/usr/local/bin/mjpg_streamer -i " -r 1280x720 -d /dev/video0 -f 30" -o " -p 8080 -w /usr/local/share/mjpg-streamer/www"

it works fine

i have tried this|-MJPEG-Streamer-Install-&-Setup-&-FFMpeg-Recording

Logs (/var/log/webcamd.log, syslog, dmesg, ... no logs, no support)

nothing shows up in the log file it is blank

Additional information about your setup (OctoPrint version, OctoPi version, ...)

from the link above if i add

@reboot /home/pi/ start


crontab -e

then nothing works at all

Which image runs on your pi?
Raspbian? Octopi? Anything else?