Could you please update the "celt" package in the EL6 branch to the release of at least 0.11.1 (as in F16) ? I consider now some work with RPMFusion for better EL6 support, and the current ffmpeg package seems to require celt-0.11.1 (it failed to compile with the current EL6's celt-0.8.0). If needed, I can (co-)maintain it in EL6 branch.
What else uses celt in the EL6 branch? What other impact could it have? We left it at 0.8 for a reason (of which I've forgotten off hand) and I believe there is a soname bump between the two so we need to be able access the impact on other packages. I've not had time to do that. If you do and can update this bug with the details I'll review it as I get the time.
Well, according to repoquery --disablerepo='*' --enablerepo=epel --tree-whatrequires celt and repoquery --whatrequires libcelt.so.1 it seems that nothing requires celt in EPEL at all... > We left it at 0.8 for a reason (of which I've forgotten off hand) Could you please recollect this? Anyway, celt-0.11.1 is built fine under RHEL6.2 environment.
celt is long dead and packages should use opus which contains the celt best bits and much more and that's packaged in EPEL6