Verizon Digital Media Services Inc.

Ravikiran Patil

Seungyeob Choi

Provided is an intelligent prefetcher for prefetching media content segments following a non-sequential naming convention. The prefetching is initiated in response to a server receiving a user request for a particular segment that is not cached. The server passes the request to an origin. The origin scans metadata of a file from which the particular segment is produced. The scanning identifies time or frame offsets for subsequent segments to be prefetched. The origin constructs the requested segment and includes in the segment header, identifiers corresponding to the offset of each subsequent segment selected for prefetching. The segment passes to the server. The server detects the modified header and generates prefetch requests based on each identifier in the modified header. The server issues the prefetch request to the origin and caches the prefetched segments returned by the origin for distribution in response to subsequent user requests for the prefetched segments.

Prefetching with a dynamic cloud packager

Disclosed is a dynamically adaptable stream segment prefetcher for prefetching stream segments from different media streams with different segment name formats and with different positioning of the segment name iterator within the differing segment name formats. In response to receiving a client issued request for a particular segment of a particular media stream, the prefetcher identifies the segment name format and iterator location using a regular expression matching to the client issued request. The prefetcher then generates prefetch requests based on the segment name format and incrementing a current value for the iterator in the segment name of the client issued request.

Prefetching of stream segments with variable names

An adaptive stream segment prefetcher changes the number of segments it prefetches following a client requested segment of the same stream based on conditions associated with that stream at prefetch time. The adaptive prefetcher increases or decreases the number of segments to prefetch for a particular stream based on the number of active or concurrent clients requesting that particular stream, based on the playback duration of the particular stream by one or more clients, or some combination of both. The adaptive prefetcher continuously monitors the conditions associated with the stream such that number of segments prefetched at a first time are greater or less than the number of segments prefetched at a later second time.

Prefetcher with adaptive stream segment prefetch window based on different demand at different times

A device for seamlessly distributing a media stream from different ingest devices of a delivery platform. The device fails over from a first ingest device to a second ingest device in response to one or more errors from attempts to retrieve parts of the media stream from the first ingest device prior to any signaling or messaging (e.g., an unpublish event) from the first ingest device indicating that the media stream has ended, is no longer available, or is otherwise removed from the first ingest device. The device also produces manifests identifying two or more bitrates for a media stream when each of the two or more bitrates is uploaded to and ingested by a different ingest device of the delivery platform.

Growing community of inventors

Los Angeles, CA, United States of America

Ravikiran Patil