Connecting a webcam to a VirtualBox guest OS

I am running Ubuntu 16.04 in a VirtualBox VM on a Windows 10 machine and wanted to access the laptop’s webcam from a Python script running in the Ubuntu VM. The trick (as described here) is to enter this line on the host while the VM is running:

VboxManage controlvm "vmname" webcam attach .0

where vmname is the name of the VM to be modified.

There doesn’t seem to be any need to add a USB filter for the webcam – doing that doesn’t seem to help at all.

The only problem with this is that the change isn’t permanent – it has to be run each time the VM is started. Simplest way to deal with that is to start the VM from a batch file:

cd "c:\Program Files\Oracle\VirtualBox"
VboxManage startvm "vmname"
VboxManage controlvm "vmname" webcam attach .0

Incidentally, this attaches the default webcam. Individual ones can be specified using .1, .2 etc. Use:

VboxManage list webcams

to get a list of webcams and aliases.

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