Avcodec: move h265 mapping further down in the list
Add VP9 support in mkv

Close #9341
Avcodec: map the VP9 ID with version checks
libvpx decoder
avformat needs avcodec.h
libvpx/WebM decoder: lower priority below avcodec

Those people not afraid to use libavcodec should benefit from a faster decoder
http://x264dev.multimedia.cx/archives/499
shine: use external library

https://github.com/savonet/shine
Fix DxVA2 crash on Error path

Close #9500 and #9665

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>
Remove outdated comment
Be more precise in libavcodec/libavformat/libavutil separation
demux: ogg: add skeleton index seeking
demux: ogg: don't use arbitrary granule as lower search bound

Should fix seeking case on time 0