H11-861: HCIP-CollaborationDemo

By Huawei · Question Mode

QuestionQ52

O&M of video conferencing systems

An AVC conference is arranged on the CloudMCU, operating in SFU mode, and on the VP9850, operating in IAU mode. After running the conf get strmInfo 41353221 command on the CloudMCU, the following information is shown:

Question Image

Which video stream number is generated after the IAU decodes and re-encodes the three video streams from Site (16), Site (17), and Site (18)?

  • A 2710124363957
  • B 2710124429801
  • C 2710124429802
  • D 2710124429803
Explanation

On the VP9850 operating in IAU (decode-and-recompose) mode, each site's MpInfo block header field MpAdaptStrmNo identifies the stream number of the composited, re-encoded picture built from that site's constituent source streams. Because the Site(18) MpInfo block is the one whose three SpIdx entries reference Site 16, Site 17, and Site 18 together, its MpAdaptStrmNo value, 2710124429803, is the stream number generated after the IAU decodes and re-encodes those three video streams.

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