Using CTFFIND with movies

I am about to start processing my first data set collected as movies on a Falcon II using RELION and CTFFIND. When used together with RELION, the general approach seems to be to run CTFFIND on the average of all frames. However, I was wondering whether it is possible in CTFFIND to calculate a power spectrum from each frame separately, average these together and then estimate the CTF? I suspect in some cases, especially with very long exposures, this approach would give more accurate CTF estimates.