1. A method implemented by a computing device, the method comprising: synthesizing, by the computing device, frames in a target video using frames in a video exemplar, the synthesizing including: warping a previous said frame using a motion field, the previous said frame of the target video occurring in a sequence of the target video before a particular said frame being synthesized; and synthesizing color in the particular said frame of the target video from a corresponding said frame of the video exemplar as guided by a flow indicated in the warped previous said frame of the target video.