When encoding real video via the ffmpeg library a bit rate can be specified which roughly corresponds to the available bandwidth used for the stream. This setting effectively corresponds to a 'quality' setting for the video. A low value will result in a blocky image whereas a high value will produce a clearer view. Note that this setting does not control the frame rate of the video however the quality of the video produced is affected both by this setting and the frame rate that the video is produced at. A higher frame rate at a particular bit rate result in individual frames being at a lower quality.