I noticed that mp4creator -create recently started hanging when muxing h.264 video (didn't test other streams). I tried it with multiple source files. I looked at the deps and realized that libpcre had recently been upgraded from 7.4 to 7.6. Guessing that there might have been an incompatible change, I re-ran revdep-rebuild - though my update script had already done this once, I wanted to be sure no needed recompiles were detected, as indeed none were. I went ahead and remerged mkvtoolnix (specifically media-video/mkvtoolnix-2.1.0), which resolved the problem. At the very least anyone using mkvtoolnix will likely need to recompile. Thought I haven't *observed* other problem caused by this yet, since an incompatible change to libpcre appears to have been demonstrated, I would suggest "revdep-rebuild --library=libpcre". Portage-wise, at the very least, mkvtoolnix should be revbumped (IMHO). Ideally, we'd make revdep-rebuild detect that recompiles are needed, but I'm not sure if it's too invasive to to bump the shared-lib version numbers.
So did you recompile it? Does it work then? And no, revdep-rebuild won't detect anything like that if there's no ABI change.
Yes, I recompiled it and it resolved the problem - I think I said that. ;) Oh and BTW, the revdep-rebuild command would be: revdep-rebuild --library='libpcre.*' (and you can also remove libpcre itself from the remerge list if you like).
*** This bug has been marked as a duplicate of bug 209697 ***
