Systems and methods for encoding source media in matroska container files for adaptive bitrate streaming using hypertext transfer protocol

摘要

Systems and methods for encoding source media in Matroska container files for adaptive bitrate streaming utilizing Hypertext Transfer Potocol (HTTP) in accordance with embodiments of the invention are disclosed. One embodiment of the invention includes a processor configured via a source encoding application to ingest at least one multimedia file containing a source video. In addition, the source encoding application further configures the processor to select a portion of the source video, transcode the selected portion of the source video into a plurality of alternative portions of encoded video, where each alternative portion is encoded using a different set of encoding parameters and commences with an intra frame starting a closed Group of Pictures (GOP), write each of the alternative portions of encoded video to an element of a different EBML container file, where each element is located within an EBML container file that also includes another element that indicates the encoding parameters used to encode the alternative portion of encoded video, and add an entry to at least one index that identifies the location of the element containing one of the alternative portions of encoded video within each of the EBML container files.

主权项

1. A source encoder configured to encode source video as a plurality of alternative video streams with different maximum bitrates and packed in container files, wherein the container files are extensible binary markup language (EBML) files, the source encoder comprising:
a processor configured via a source encoding application to ingest at least one multimedia file containing a source video; wherein the source encoding application further configures the processor to:
select a portion of the source video;transcode the selected portion of the source video into a plurality of alternative portions of encoded video, wherein each alternative portion is encoded at a different maximum bitrate that is associated with a particular alternative video stream using a different set of encoding parameters and commences with an intra frame starting a closed Group of Pictures (GOP);write each of the alternative portions of encoded video to a Cluster element of a different EBML container file, wherein each EBML container file includes another element that indicates the set of encoding parameters used to encode the alternative portion of encoded video, and wherein cluster elements containing alternative portions of encoded video from a same selected portion of the source video share a same time code;for each alternative portion of encoded video written to a given Cluster element within a given EBML container file, add an entry to a Cues element within the given EBML container file that indexes a first byte of a next Cluster element containing one of the written alternative portions of encoded video, wherein the added entry enables inference of a size of the given Cluster element by a playback device; andcreate a top level index file that identifies the plurality of EBML container files and describes at least the maximum bitrate of the alternative video streams contained within the EBML container files, wherein the top level index file is separate from the EBML container files.