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Just-in-time (JIT) encoding for streaming media content

  • US 9,609,340 B2
  • Filed: 12/28/2012
  • Issued: 03/28/2017
  • Est. Priority Date: 12/28/2011
  • Status: Active Grant
First Claim
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1. A method comprising:

  • during a first time period;

    receiving source data having media content at a just-in-time (JIT) encoder executing on a computing system, the media content containing compressed video and compressed audio;

    inspecting the media content to locate key frames and audio boundaries without decoding the media content;

    creating, responsive to the inspecting and without decoding the media content, an index indicating the key frames and audio boundaries of the media content, wherein the creating the index comprises creating a metadata descriptor file of the media content, wherein the metadata descriptor file specifies a plurality of different quality profiles and locations of where the media content encoded according to the plurality of different quality profiles will be stored during a second time period; and

    storing the index for subsequent just-in-time encoding of the media content;

    during the second time period, which comes after the first time period;

    receiving, at the computing system from a second computing system, a request for a specified time range of the media content at a first quality level of a plurality of specified quality levels, wherein the first quality level corresponds to a specified quality profile of the plurality of different quality profiles;

    inspecting, by the JIT encoder, the metadata descriptor file to identify a location associated with the specified quality profile;

    finding, by the JIT encoder, a latest key frame before a first frame of the media content at the specified time range in the index;

    decoding, by the JIT encoder, the media content from the latest key frame through a last frame of the media content of the specified time range, to generate decoded media content;

    re-encoding, by the JIT encoder, the decoded media content according to the first quality level, to generate re-encoded media content;

    creating, by the JIT encoder, one or more slices of the re-encoded media content for the specified time range; and

    storing, by the JIT encoder, the one or more slices at the location specified in the metadata descriptor file for the specified quality profile.

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