Yes I have them, all of previous builds in one dir. Do you know which one you need? I don't, because I don't keep a list of updated packages.Do You have a copy of old packages? I will try install them manually.
Dependencies tree in linux is a real headache.
I built 4.3 version already. It is really buggy, some streams not found and not recognizes alives or dead ones. Scan result for all of them is Fail. This is normal, because it development version and should not be used in regular use.You have precompiled dependencies. Will it be difficult to compile versions 4.1 and 4.3? I want to try them.
If you want to test it, then be my guest:
http://downloads.zyxel.nas-central.org/ ... -arm-1.txz
Regarding older versions like 4.0.9 and 4.0.10 I answered in previuos post. Didn't tried 4.1 yet, but can do that a bit later. Note: it is development version also and released in 2015 may 15, so I doubt it will compile with latest ffmpeg.
I can upload build scripts of packages to NAS central if you wish to try yourself. You will need to modify each of them and adapt to your system.