Abstract: Rendering mutable composite media is disclosed, including: storing a composite media including a set of slides, a user overlay video, and a set of presentation metadata, wherein the set of presentation metadata relates one or more slides to the user overlay video; and rendering the composite media including: using the set of presentation metadata to generate an image including a relevant portion of the set of slides; and overlaying at least a portion of the user overlay video on the image including the relevant portion of the set of slides.

Abstract: Removing disfluencies from an audio stream is disclosed, including: receiving an audio stream comprising payload segments and disfluency segments; determining windows of audio in the audio stream; identifying the disfluency segments in the audio stream using the windows of audio; and modifying the audio stream by removing at least a portion of the disfluency segments.