摘要:
Systems and methods for performing smooth visual search of media encoded for adaptive bitrate streaming using trick play streams are disclosed. One embodiment of the invention includes requesting and buffering portions of video from at least one of the alternative streams using a playback device, decoding the buffered portions of video using a decoder on the playback device, receiving at least one user instruction directing the playback device to perform a visual search of the media, requesting and buffering portions of video from the trick play stream using the playback device, and decoding the buffered portions of the trick play stream using a decoder on the playback device.
摘要:
Systems and methods for adaptive bitrate streaming of media stored in Matroska container files utilizing Hypertext Transfer Potocol (HTTP) in accordance with embodiments of the invention are disclosed. In one embodiment, a processor configured, via a client application, to request portions of files from a remote server. In addition, the client application further configures the processor to retrieve top level index data that identifies a plurality of EBML container files and describes at least a maximum bitrate of the alternative streams contained within the EBML container files, parse the top level index data to obtain information identifying the plurality of EBML container files, request a portion of at least one of the EBML container files that contains the at least one element that specifies the encoding parameters of the stream contained within the EBML container file, retrieve an index that references each element containing portions of encoded video within at least one of the EBML container files, utilize the index to request portions of a first EBML container file that includes elements that contain portions of encoded video, receive and buffer the requested elements, decode the encoded video contained within the buffered elements utilizing the encoding parameters, measure current streaming conditions, and select another of the EBML container files from which to retrieve elements containing portions of encoded video for decoding, where the selection is based upon the measured streaming conditions and the description of the bitrate of the alternative stream contained within the top level data.
摘要:
Systems and methods for performing smooth visual search of media encoded for adaptive bitrate streaming using trick play streams are disclosed. One embodiment of the invention includes requesting and buffering portions of video from at least one of the alternative streams using a playback device, decoding the buffered portions of video using a decoder on the playback device, receiving at least one user instruction directing the playback device to perform a visual search of the media, requesting and buffering portions of video from the trick play stream using the playback device, and decoding the buffered portions of the trick play stream using a decoder on the playback device.
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.
摘要:
Systems and methods for performing smooth visual search of media encoded for adaptive bitrate streaming using trick play streams are disclosed. One embodiment of the invention includes transcoding a selected portion of the source video into a portion of trick play stream video for inclusion in a trick play stream using the source encoder, where the portion of trick play stream video is encoded at a lower frame rate and a lower resolution than the source video, writing the trick play stream to a separate container file using the source encoder, and adding an entry to an index that identifies the location of each frame in the portion of trick play stream video within the container file containing the trick play stream.
摘要:
Systems and methods for adaptive bitrate streaming of media stored in Matroska container files utilizing Hypertext Transfer Potocol (HTTP) in accordance with embodiments of the invention are disclosed. In one embodiment, a processor configured, via a client application, to request portions of files from a remote server. In addition, the client application further configures the processor to retrieve top level index data that identifies a plurality of EBML container files and describes at least a maximum bitrate of the alternative streams contained within the EBML container files, parse the top level index data to obtain information identifying the plurality of EBML container files, request a portion of at least one of the EBML container files that contains the at least one element that specifies the encoding parameters of the stream contained within the EBML container file, retrieve an index that references each element containing portions of encoded video within at least one of the EBML container files, utilize the index to request portions of a first EBML container file that includes elements that contain portions of encoded video, receive and buffer the requested elements, decode the encoded video contained within the buffered elements utilizing the encoding parameters, measure current streaming conditions, and select another of the EBML container files from which to retrieve elements containing portions of encoded video for decoding, where the selection is based upon the measured streaming conditions and the description of the bitrate of the alternative stream contained within the top level data.
摘要:
Systems and methods for determining available bandwidth and performing initial stream selection when commencing adaptive bitrate streaming using Hypertext Transfer Protocol (HTTP) in accordance with embodiments of the invention are disclosed. One embodiment includes performing a bandwidth probe to obtain an estimate of the available bandwidth between a playback device and a remote server, where the bandwidth probe comprises the playback device requesting blocks of data of increasing size from the remote server until the time taken to download a requested block exceeds a predetermined threshold, selecting an initial stream from said plurality of streams of encoded media that are encoded at different maximum bitrates rates using the playback device based upon the maximum bitrates of the plurality of streams and the estimated available bandwidth, and commencing streaming of encoded media by requesting portions of the encoded media from the initial streams using the playback device.
摘要:
Systems and methods for compressing and sharing geotagged video in accordance with embodiments of the invention are disclosed. One embodiment includes receiving a captured video sequence, where at least one geographic location is associated with the captured video sequence, selecting a segment of the captured video sequence, identifying a set of relevant video segments from a geotagged video database based on the at least one geotag associated with the captured video sequence, determining the video segment from the set of relevant video segments that is the best match by comparing the similarity of the content in the video segments to the content of the selected segment from the captured video sequence, encoding the selected segment, where the selected segment is encoded using predictions that include references to the video segment that is the best match, and storing the encoded video segment in the geotagged video database.
摘要:
Systems and methods for determining available bandwidth and performing initial stream selection when commencing adaptive bitrate streaming using Hypertext Transfer Protocol (HTTP) in accordance with embodiments of the invention are disclosed. One embodiment of the invention includes measuring network bandwidth using a playback device, determining an initial network bandwidth estimate using the network bandwidth measurements, selecting an initial stream from said plurality of streams of encoded media that are encoded at different maximum bitrates rates using the playback device based upon the maximum bitrates of the plurality of streams and the initial bandwidth estimate; and commencing streaming of encoded media by requesting portions of the encoded media from the initial streams using the playback device.
摘要:
Systems and methods for saving encoded media streamed using adaptive bitrate streaming in accordance with embodiments of the invention are disclosed. In one embodiment of the invention, a playback device configured to perform adaptive bitrate streaming of media includes a video decoder application and a processor, where the video decoder application configures the processor to select a download stream from a set of alternative streams of video data, measure streaming conditions and request a stream of video data from the alternative streams of video data, receive portions of video data from the requested stream of video data, decode the received video data, save the received video data to memory, when the received video data is from the download stream and separately download and save the corresponding portion of video data from the download stream to memory, when the received video data is not from the download stream.