# [FFmpeg-user] Status of two prores decoders/encoders

Thomas Worth dev at rarevision.com
Fri May 17 13:10:40 CEST 2013

```On Fri, May 17, 2013 at 3:05 AM, Carl Eugen Hoyos <cehoyos at ag.or.at> wrote:

> Robert Krüger <krueger <at> lesspain.de> writes:
>
> > is there a place where I can find out why there are
> > two prores decoders (both LGPL) and two encoders
> > (also both LGPL)
>
> http://blog.pkh.me/p/13-the-ffmpeg-libav-situation.html
> http://en.wikipedia.org/wiki/Not_invented_here
>
> > and what the pros and cons of each are?
>
> The "Anatoliy" encoder is faster.

prores_aw (anatoliy) is up to 4x faster in my tests. However, prores_ks
(kostya) compresses the data more efficiently (files are somewhat smaller
for roughly the same quality). I'm not sure this is worth the massive
slowdown, but for incredibly large files (several hundred GB), it might be