[Koying]

Are we to assume that Herman's patched libstagefright.so is required for further testing and development of these builds on RK3066 SoCs? If so we could do with a link and explanation in the OP or we'll end up with a slew of problems stemming from users not having installed that file.

Indeed. Having a working libstagefright.so is only half the solution. The other half is getting it on the devices self.
I assume the level of post-sale support and updates differ greatly amongst the various device vendors, so It will be hard to have a one-size-fits-all.

As of now, I think the safe route is to keep blacklisting non-MOD16/32 vids, with the option of bypassing the blacklisting via advancedsettings.xml

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Well, actually the one-size-fits-all solution would be that Rockchip renames the components in the corrected libstagefright.so, so that we can detect whether it's the fixed version or not, but that seems far-fetched.
A good one would maybe to somehow pass a version number in the metadata just after doing the OMXCodec::create...