Andrey, this is NOT Important as I was just playing around with a newly installed Fedora 38, but here is what went wrong.
# rpm -i cinelerra-5.1-20231201.fc38.x86_64.rpm
error: Failed dependencies:
libsuil-0.so.0()(64bit) is needed by cinelerra-5.1-20231201.x86_64
# dnf install libsuil-0.so.0
...
Installed:
suil-0.10.18-1.fc38.i686
...
# rpm -i cinelerra-5.1-20231201.fc38.x86_64.rpm
error: Failed dependencies:
libsuil-0.so.0()(64bit) is needed by cinelerra-5.1-20231201.x86_64
I will see if I can find the exact older version needed and install it instead.