This is good sign, hopefully!

I used this line for configuring:

LDFLAGS=`pkg-config --libs x11` setarch i686 ./configure --with-single-user --with-git-ffmpeg=https://git.ffmpeg.org/ffmpeg.git

and git am one single patch form my ff6 series

 git am /home/guest/K38_sdcard1/Documents/ff6/0001-Fix-build-in-pluginfclient.C-with-ffmpeg-6.0.patch

ffmpeg at

commit 9f66286f0bdd42fe388a7366909c11954fd330a6 (grafted, HEAD -> master, origin/master, origin/HEAD)                                                                                                 Author: Kacper Michajłow <kasper93@gmail.com>
Date:   Wed Aug 23 22:06:00 2023 +0200                                                             
    avcodec/vulkan_decode: print also codec header name

time to try resulting binary ...