I build a standard single-user, static bundled Cingg and looked at the thirdparty ffmpeg-8.0

cd /cinelerra/cinelerra-5.1/thirdparty/ffmpeg-8.0

Trying to verify its available hwaccels methods:
./ffmpeg -hwaccels
Hardware acceleration methods:
vdpau
cuda
vaapi


Verifying the same with my system ffmpeg-8.0.1 on Tumbleweed-Slowroll I get
ffmpeg -hide_banner -hwaccels
Hardware acceleration methods:
vdpau
cuda
vaapi
qsv
drm
vulkan

I wonder why not also the thirdparty ffmpeg-8.0 does list "qsv" and "vulkan"?
Seemingly among encoders "--enable-libvpl" and "--enable-vulkan" are listed.