If I try only to record by using the following line it works just fine: dos('"C:\Program Files (x86)\VideoLAN\VLC\vlc.exe" dshow:// :dshow-vdev="HD Pro Webcam C920" :dshow-aspect-ratio=16\:9 :dshow-size=1920x1080 :dshow-fps=30 :sout=#transcode{vcodec=h264,acodec=mpga,ab=128,chann...