Is it OK to stabilize =media-libs/libmediainfo-0.7.71 ? If so, please CC all arches which have stable keywords for older versions of this package.
If you open these bugs via scripts it could be nice to check revdeps. In this case libmediainfo only goes stable when mediainfo of the same version does and newer mediainfo versions require wxGTK:3.0 which isn't stable yet either. I would close this as later if that was an option, but I'll settle for can't fix.