[mpv/el8] (6 commits) ...Merge branch 'master' into el8

Summary of changes: bf6ab8d... clean up (*) 48b25a1... Rebuild for new libplacebo version (*) 60f14c3... - Rebuild for ffmpeg-4.3 git (*) ccaa149... Rebuild for new libcdio version (*) 6205ad0... Enable vapoursynth (rfbz#5681) (*) b1b8d19... Merge branch 'master' into el8 (*) This commit already existed in another branch; no separate mail sent