- Update to version 21.3.5:
  * single change: Updates release notes for 21.3.4 release
    * New features:
      + VP9 Encode: Added WebRTC mode.
      + Samples:
        . Added "VuiTC" option to set VUI TransferCharacteristics in
          sample_multi_transcode.
        . Added the verification of input params before used in Init
          for sample_encode
      + Misc:
        . Added support of DRM_FORMAT_NV12 for console mode
          rendering.
        . Added runtimes support matrix for Media SDK and oneVPL GPU
          Runtime.
      + Software requirements:
        . Libdrm 2.4.84 or later
        . Kernel 4.14 or later (5.4 recommended, consult kernel
          support matrix wiki page for details)
      + Known issues: Kernel 5.0 have known issue with endurance on
        Skylake see
        https://bugs.freedesktop.org/show_bug.cgi?id=110285 for
        details.
    * Limited support on certain platforms:
      + MPEG-2 encode is not supported on Apollo Lake
      + H.264 Flexible Encode Infrastructure only supported on
        Broadwell and Skylake
      + Multi Frame Encode (MFE), HEVC Flexible Encode Infrastructure
        only supported on Skylake
      + VP9 decoder is supported starting from Kabylake platform
      + VP9 encoder is supported starting from Icelake platform
      + SW fallback is unsupported for all components but MJPEG
      + Keem Bay requires a VPU runtime library
      + The following features are supported by Keem Bay runtime and
        are not supported by Gen graphics runtime:
        . mfxExtInsertHeaders
        . mfxExtEncoderIPCMArea

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