libvlc_video_set_output_callbacks and vdpau

[Jona]

libvlc_video_set_output_callbacks does not seem to work with vdpau, it falls back to:

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vaapi generic: Using Intel iHD driver for Intel(R) Gen Graphics - 22.3.1 ()

Without libvlc_video_set_output_callbacks vdpau is used:

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vdpau_instance decoder device: Using NVIDIA VDPAU Driver Shared Library 550.142 Wed Dec 11 04:53:10 UTC 2024

It would be nice to use libvlc_video_set_output_callbacks with vdpau, so it would be possible to use it with nvidia GPUs (with Windows and DXVA2 it already works).
Or is it intended that libvlc_video_set_output_callbacks only works with vaapi?

Edit: With Windows it is:

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dxva2 generic: Using DXVA2 (NVIDIA GeForce RTX 3090, vendor NVIDIA(10de), device 2204, revision a1)

[Rémi Denis-Courmont]

To use VDPAU, you need to supply an X11 window handle, not output callbacks.

[Jona]

I see, thanks. But isn`t the purpose of libvlc_video_set_output_callbacks that the image stays on the GPU? And right now Linux uses GPU too, just not the nvidia one.
Or is there another way to use nvidia cards with libvlc video callbacks and Linux?

[Rémi Denis-Courmont]

No. Patches are welcome.

[Jona]

It works now with Ubuntu, Nvidia GPU and video callbacks, but with va-api.
I had to install this driver from source: https://github.com/elFarto/nvidia-vaapi-driver

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vaapi generic: Using VA-API NVDEC driver [direct backend]