ffmpeg and while looking through the list of codes with
ffmpeg -codecs I realized there are actually three different prores encoders:
What are the differences between them?
I found the following explanation on the ffmpeg wiki:
Fmpeg comes with 3 different prores encodes: "prores", "prores_ks" (formerly named "prores_kostya") and "prores_aw" (formerly named "prores_anatolyi"). In our testing we've used the "prores" and the "prores_ks" encoders and found "prores_ks" to be the best encoder to use. It is the only one that supports the 4444 colorspace and although it may be slightly slower. The color quality of the videos produced by these two codecs was visually indistinguishable Because of the 4444 support we've decided to go with Kostya's version of prores.
So, if you want to do 4444 and need alpha channel support,
prores_ks is the way to go.
This blog post also suggests that
prores_ks has a smaller footprint, and that
prores_aw are basically the same.