Passing flags to ffmpeg

I would like to pass on the following flags to ffmpeg

.-nostdin 
 -loglevel error

Is it possible ? The nostdin flag is required because ffmpeg swallows stdin. More info here. The loglevel parameter would help a lot in reducing the verbosity of the ffmpeg output

[roman-ku]

For anybody that needs an example (like I did):

(
    ffmpeg
    .input(in_filename, ss=time)
    .output(out_filename, vframes=1)
    .global_args('-loglevel', 'error')
    .global_args('-y')
    .run()
)

[kkroening]

Done. See also #30.