Get output result from stdout?

[Gregoor]

I'm not very proficient with ffmpeg, but I'm used to getting some metadata from stdout after the conversion. E.g.:
size=N/A time=00:00:01.27 bitrate=N/A speed=94.2x

Now with the way this library wraps ffmpeg I'm having trouble getting that output, stdout is naturally just the stream of the resulting file. Is it still possible to get that result data within this library?