On 02.11.2025 00:38, Niklas Haas via ffmpeg-devel wrote:
> Hi all,
> 
> at VDD'25 multiple people discussed interest in the ability to improve the
> filter negotiation around hardware filters; specifically about avoiding
> the need to constantly set the pixel formats manually when going from HW to
> SW, and also automatically insert hwupload/hwdownload filters when needed.
> 
> I raised the possibility of funding it via an SPI bounty, and received
> widespread approval.
> 
> I am familiar with this code and have previously attempted solving this
> exact problem on my own time, so I feel like I have a good understanding of
> what needs to be done to make it possible.
> 
> I would like to formally propose allocating a bounty of 10,000 EUR for this
> task; which would cover all necessary prerequisite changes (such as fixing
> the hwupload/hwmap), full negotiation of swformats, and automatic
> hwupload/hwdownload insertion.

Definitely one of the bigger pain-points when using FFmpeg with hardware 
accelerated filter chains, specially when you start mixing different 
flavours like Vulkan, VAAPI, CUDA, ... in one chain.
So I'm all for it.