Abstract: In one embodiment, a method includes identifying a plurality of segments of media content, each of the plurality of segments including a plurality of media frames, generating segment metadata for each of the plurality of segments, the segment metadata including a segment identifier, transmitting a broadcast stream including the plurality of segments and the segment metadata for each of the plurality of segments, and making the plurality of segments available for retrieval via a unicast stream using the segment identifiers.

Abstract: Segments of media content may be shared amongst multiple requesting entities in a cDVR environment. In one illustrative example, a first request to initiate recording of media content at a first start time is received from a first requesting entity. In response, a first encrypted copy of a first plurality of content segments of the media content is cached in network memory, in a first encryption window associated with a first encryption key. A first manifest including a first set of URLs is generated and sent to the first requesting entity, where URLs of the first set reference a first identifier of the first encryption window and a respective one of the content segments. If a second request to initiate recording of the media content is received from a second requesting entity at a second start time that does not exceed an interval threshold, no additional copy needs to be made.

Abstract: In one embodiment, a method comprising obtaining a stream comprising first network abstraction layer (NAL) units generated in a first encoding, the first NAL units including first slices, obtaining second NAL units generated in a second encoding, the second NAL including second slice(s), and stitching the second NAL units into the stream, the stitching including positioning the second slice(s) in respective position(s) in the stream formerly occupied by temporary slice(s) generated in the first encoding, and for the second slice(s) conforming at least one slice header syntax element and at least one network abstraction layer unit syntax element of a second slice to values of a temporary slice formerly occupying the position of the second slice, and retaining at least one other slice header syntax element of the second slice as encoded in the second encoding.