A first sequence of pictures may be partitioned into plural representations, each of the plural representations may be encoded independently of each other with a common time base, a first portion of the plural encoded representations may be provided based on a first network condition, the first portion having a first bit-rate, and a second portion of the plural encoded representations may be provided having a second bit-rate different than the first bit-rate, wherein a switch from providing the first portion to providing the second portion is responsive to a second network condition different than the first network condition.