<p>With ffmpeg there appear to be various ways to specify quality (-b, -vb, -crf) when encoding video. Is there a way to get a copy of ffmpeg on disk to tell me what its current default quality level/specification method for -vcodec libx264 is? (Or even better, to look at an existing mp4 on disk and tell me what its quality level is in terms of ffmpeg command line flags? ffmpeg -i gives me a kb/s number but I don't know what to do with that.)</p>
