Request: Add option to suppress terminal creation for use with .pyw

[nhansendev]

When running ffmpeg.probe (and probably other commands) subprocess.Popen will attempt to open a new terminal when .pyw is used. The intent with .pyw is that the program will run without any terminals appearing, so this is undesirable.

The fix I found is simply including creationflags=subprocess.CREATE_NO_WINDOW in the Popen command like so:

p = subprocess.Popen(args, stdout=subprocess.PIPE, stderr=subprocess.PIPE, creationflags=subprocess.CREATE_NO_WINDOW)

Assuming there are use-cases where the terminal appearing is desirable, could a kwarg be added to turn them on/off, please?

[exislow]

+1