Jose,

Make sure you are waiting to close the device:

dev = DeviceOpen["Camera"];
snapshots = {};
tsk = RunScheduledTask[AppendTo[snapshots, DeviceRead[dev]], {3, 10}];
RunScheduledTask[DeviceClose[dev], {35}];

or do a Pause[35] before closing the device

Follow this with:

RemoveScheduledTask[ScheduledTasks[]];
Partition[snapshots, 2] // TableForm

This runs for me on a Mac with 11.1.0

Hi Jose,

I suppose the problem is that you haven't initialised the variable "snapshots".

dev = DeviceOpen["Camera"];
snapshots = {};
RunScheduledTask[AppendTo[snapshots, DeviceRead[dev]], {3, 10}];

Then you should remove the scheduled task(s):

RemoveScheduledTask /@ ScheduledTasks[]

Cheers,

Marco

Hi Jose,

what system are you on. For me it does work:

dev = DeviceOpen["Camera"];
snapshots = {};
RunScheduledTask[AppendTo[snapshots, DeviceRead[dev]], {3, 10}];
Partition[snapshots, 2] // TableForm

Cheers,

Marco