[Bug 779132] waylandsink: memory:DMABuf preferred in caps

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=779132

Nicolas Dufresne (stormer) <nicolas at ndufresne.ca> changed:

           What    |Removed                     |Added
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             Status|NEW                         |NEEDINFO
                 CC|                            |nicolas at ndufresne.ca

--- Comment #1 from Nicolas Dufresne (stormer) <nicolas at ndufresne.ca> ---
It's all theoretical, I think the preference would be to have DMABuf as
SystemMemory. In any case, upstream decides (not downstream), no matter what
the order is, upstream should follow a certain semantic. The upstream preferred
order shall be:

- DMABuf as SysMem (within the format exposed with the caps feature)
- DMABuf with caps feature (not mapable dmabufs)
- DMABuf as SysMem (within the format supported for SHM)
- And finally resort to SysMem / Copies

Can you show what the upstream part of your use case is doing ? The DMABuf caps
feature won't negotiate with filters like textoverlay or even videoconvert.

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