1. A method for generating a video with corresponding audio, comprising: receiving a spherical video; receiving a plurality of audio channels representing audio captured concurrently with the spherical video, each of the plurality of audio channels comprising directional audio corresponding to a different direction; mapping different spatial regions of the spherical video to different audio channels; for each of a plurality of frames of the spherical video, extracting a sub-frame having a reduced field of view relative to a field of view of the spherical video; for each of the sub-frames, determining, by a processor, one or more of the spatial regions overlapping the sub-frame and generating a portion of an audio stream from one or more different audio channels corresponding to the one or more spatial regions overlapping the sub-frame; and outputting the generated video and the audio stream.