Systems and Methods of Encoding Multiple Video Streams for Adaptive Bitrate Streaming

摘要

Systems and methods for encoding multiple video streams in accordance with embodiments of the invention are disclosed. In one embodiment, a source encoder configured to encode source video as a number of alternative video streams includes a parallel processing system configured to collect statistics on source video data and write the statistics to shared memory in a first pass through the received multimedia content, determine initial encoding information for source video data and write the initial encoding information to shared memory during the first, encode the source video data in parallel using collected statistics and initial encoding information to produce a plurality of alternative video streams during a second pass, and parallel encoding processes are configured to reuse additional encoding information that has already been determined for a portion of video and to generate additional encoding information that has not already been determined for a portion of video.

主权项

1. A source encoder configured to encode source video as a number of alternative video streams, the source encoder comprising:
memory containing a source encoder application; a shared memory; and a parallel processing system configured by the source encoding application to:
receive multimedia content, where the multimedia content comprises source video data having a primary resolution;collect statistics on source video data and write the statistics to shared memory in a first pass through the received multimedia content;determine initial encoding information for source video data and write the initial encoding information to shared memory during the first pass through the received multimedia content; andencode the source video data in parallel using collected statistics and initial encoding information to produce a plurality of alternative video streams during a second pass through the received multimedia content with a plurality of parallel encoding processes, where the encoding of the source video utilizes additional encoding information, the parallel encoding processes are configured to reuse additional encoding information that has already been determined for a portion of video by another parallel encoding process and stored in the shared memory, and the parallel encoding processes are configured to generate additional encoding information that has not already been determined for a portion of video by another parallel encoding process and store the generated additional encoding information in the shared memory.