Update libbluray
Another tiny libbluray change
DXVA2 decoder: Don't crash when the width or height cannot be determined.

In that case, just refuse to decode using DXVA.
Update ffmpeg
Add support for RTMP protocol with librtmp parameters input style.
Do not round aspect ratio when one of its values exceed 255.

- Use the same limit everywhere for consistency.
- Add one missing cast to avoid possible overflow.
Add RTMP to the installer
[MPC-HC] Use our own ffmpeg clone repository.

WARNING: This should be the first custom commit in our fork and its title should not be modified.
[MPC-HC] LAV Splitter: Exhibits MKV attachments through IDSMResourceBag interface.
[MPC-HC] Tray icon: Add an optional custom callback for "show property page" events.
[MPC-HC] Fix the include directories for FFmpeg's out-of-source-tree build.
[MPC-HC] Version number: Add a "git describe based" commit number to identify the vanilla LAV Filters we are based on.

This way if we distribute LAV Filters version X.Y.Z.N, it means that our custom build is based on:
 - the stable version X.Y.Z,
 - with N official patches (which will be part of next official LAV Filters build),
 - and some custom non-official patches which are here to improve the integration in MPC-HC.
[MPC-HC] LAV Splitter: Export embedded cover through IDSMResourceBag interface.