[FFmpeg-devel] [PATCH] Vulkan hwcontext and filters

[Mark Thompson]

On 10/01/2020 21:05, Lynne wrote:
> From 1e3a50fbe4399f76c0ab0f62bf6d6c65b8565db4 Mon Sep 17 00:00:00 2001
> From: Lynne <dev at lynne.ee>
> Date: Sun, 27 Oct 2019 14:47:18 +0000
> Subject: [PATCH 7/9] lavfi: add an avgblur_vulkan filter
> 
> This commit adds a fast avgblur Vulkan filter.
> This will reset Intel GPUs on Windows due to a known, year-old driver bug.
> ---
>  configure                       |   1 +
>  libavfilter/Makefile            |   1 +
>  libavfilter/allfilters.c        |   1 +
>  libavfilter/vf_avgblur_vulkan.c | 406 ++++++++++++++++++++++++++++++++
>  4 files changed, 409 insertions(+)
>  create mode 100644 libavfilter/vf_avgblur_vulkan.c

There is something weirdly wrong with the edges of the local blocks here.

With a pure white input:

./ffmpeg_g -v 55 -y -init_hw_device vulkan:0,debug=1 -i white.png -filter_hw_device vulkan0 -vf format=yuv420p,hwupload,avgblur_vulkan,hwdownload,format=yuv420p -frames:v 1 out.png

<http://ixia.jkqxz.net/~mrt/f242fc36ea7ed26c8809fe442e8e67df/out.png>

Looks like undefined values are leaking in to the average?

Thanks,

- Mark