[KRdp] [Bug 503474] New: KRDP uses deprecated AVC420 with modern RDP clients

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Mon Apr 28 12:08:47 BST 2025


https://bugs.kde.org/show_bug.cgi?id=503474

            Bug ID: 503474
           Summary: KRDP uses deprecated AVC420 with modern RDP clients
    Classification: Plasma
           Product: KRdp
           Version: unspecified
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: unassigned-bugs at kde.org
          Reporter: armin.novak at thincast.com
                CC: ahiemstra at heimr.nl
  Target Milestone: ---

Reference: https://invent.kde.org/plasma/krdp/-/issues/22

SUMMARY

krdp is using a deprecated mode to send graphics data

AVC420 was only ever used with windows 8.1, all more modern systems use AVC444
pack the H264 data in such a frame if you don't happen to have a windows 8.1
client connecting.

also look at `FreeRDP` shadow server, that one does handle all supported
formats for GFX depending on capabilities of the connecting client.

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