A diagnostic tool offered on the BBC iPlayer site measures a user 's streaming capabilities and bandwidth .
This makes use of an adaptive bitrate stream so that if the user 's bandwidth suddenly drops , iPlayer will lower its streaming rate to compensate .
A diagnostic tool offered on the iPlayer   site measures a user 's streaming capabilities and bandwidth .
This makes use of an adaptive bitrate stream so that if the user 's bandwidth suddenly drops , iPlayer will lower its streaming rate to compensate .