Abstract: The technology disclosed relates to hosting a virtual conference with a plurality of attendees, such that attendees in a first category have an interactive broadcast access to the virtual conference, and attendees in a second category have a view-only broadcast access to the virtual conference. The interactive broadcast access allows the attendees in the first category to share their audio and/or video with the plurality of attendees. The view-only broadcast access allows the attendees in the second category to receive audio and/or video from at least one attendee in the first category, and prevents the attendees in the second category from sharing their audio and/or video with the plurality of attendees. In response to a transition request received from a given attendee in the second category, the given attendee is transitioned from the view-only broadcast access to the interactive broadcast access.

Abstract: A composite video including a plurality of videos in a single stream is sent from a video streamer server to a client, where it is presented on an electronic display. A user may make a selection in the composite video that is translated to an absolute media reference that may include information identifying which video of the composite video was selected, an absolute media time identifying an elapsed time from the beginning of the video to the selection, and/or an absolute media spatial coordinate identifying a spatial location of the video that was selected. Auxiliary information related to the composite video may be obtained based on the selection and the absolute media reference and displayed to the user.

Abstract: In some embodiments, a server system composites in real-time, in response to a user video search query, a standard-compliant (e.g. MPEG-4/H.264) SD or HD video stream encoding a rectangular (x-y) composite video preview panel array (grid) of video search results. Each panel/tile in the rectangular panel array displays a temporal section (e.g. the first 90 seconds, looped-back) of a video identified in response to the user query. Generating the composite video panel array in real-time is achieved by compositing the component video panels in the compressed domain, after each panel undergoes off-line a compressed-domain pre-compositing preparation process that facilitates dynamic compositing of the panels into a single video stream. The pre-compositing preparation includes transcoding to a format having a down-scaled common resolution, common GOP structure, and one-slice-per-row slice structure.

Abstract: In some embodiments, a video (e.g. MPEG-2, H.264) transcoder channel pool is used to transcode multiple independent videos (programs) per channel substantially concurrently. A syntactically-unified combined input video stream is assembled by interleaving segments of different input video streams. The combined stream may be a container stream or elementary stream. Each segment includes one or more groups of pictures (GOP). The combined stream includes the payload video data of the input streams in unmodified form, and modified header data characterizing the combined stream as a single video stream. The combined input stream is transcoded using a single transcoder channel/input port to generate a combined output video stream. Multiple independent output video streams are assembled by de-interleaving segments of the combined output video stream according to stored interleaving break identifiers.

Abstract: A method and system for audio selection is disclosed. Multiple active videos are rendered in a single video stream and the multiple active videos are simultaneously displayed on a client machine. A user selects a video from among the multiple active videos for which associated audio is presented. As the user selects different videos the previous audio is stopped and the new audio is played. The new audio is synchronized to the selected video.

Abstract: In some embodiments, a server system composites in real-time, in response to a user video search query, a standard-compliant (e.g. MPEG-4/H.264) SD or HD video stream encoding a rectangular (x-y) composite video preview panel array (grid) of video search results. Each panel/tile in the rectangular panel array displays a temporal section (e.g. the first 90 seconds, looped-back) of a video identified in response to the user query. Generating the composite video panel array in real-time is achieved by compositing the component video panels in the compressed domain, after each panel undergoes off-line a compressed-domain pre-compositing preparation process that facilitates dynamic compositing of the panels into a single video stream. The pre-compositing preparation includes transcoding to a format having a down-scaled common resolution, common GOP structure, and one-slice-per-row slice structure.