ogg-index fails with an unhelpful error message if the file contains Speex or Opus streams
If you try running ogg-index on a file which contains Opus or Speex streams (eg a Theora + Opus file), then you get a rather unfriendly error such as
FAIL: Unhandled stream type, serialno=478384172 aborting indexing!
Where the stream number is that of the Speex or Opus stream
Assuming it's not trivial to add support for those formats, it would be nice if ogg-index could instead give a more helpful message such as _Opus not supported (stream serialno=478384172) - aborting indexing! _