Features

Added

• config: allow profile forward-references in default profile
• demux_lavf: "support" mov edit lists and log errors if used (FFmpeg only)
• hwdec: Add support for CUDA and cuvid/NvDecode (mostly useful on Linux where VDPAU still lacks HEVC Main 10 support; keep using DXVA2 on Windows)
• osc: add right-click behavior to playlist and chapter buttons
• osc: add user-alterable margin for top/bottombar
• rpi: add --hwdec=rpi-copy (#3604)
• sd_lavc: enable teletext
• vaapi: support drm devices when running in vaapi-copy mode
• vd_lavc: Add hwdec wrapper for crystalhd
• vo_opengl: add hw overlay support and use it for RPI
• vo_opengl: basic mali fbdev support
• vo_opengl: rpi: merge vo_rpi features

Removed

• vo_opengl: remove pre/post/scale-shaders in favor of user-shaders

Deprecated

• config: deprecate ao and vo auto-profiles
• vo_rpi: deprecate this VO

Options and Commands

Added

• add --teletext-page option
• af_pan: add af-command support to change the matrix
• af_rubberband: add af-command and option to change the pitch
• command: add a load-script command
• command: add a video-dec-params property
• command: add an apply-profile command
• command: add audio-pts property to get the audio pts
• command: add options to property list
• command: add sub-text property for current subtitle text
• command: export profile list as a property (#977)
• options: add --hwdec=yes as alias for --hwdec=auto
• player: add --player-operation-mode=pseudo-gui
• player: add --video-osd=no option to disable video OSD (#3387)
• player: add --watch-later-directory option
• stream_bluray: select title by playlist (bd://mpls/[playlist])
• vo_opengl: disable glFlush() by default, and add an option to enable it for testing

Changed

• af_rubberband: default to channels=together
• command: allow absolute seeks relative to end of stream
• command: make bitrate properties observable
• command: make most options observable
• msg: make --log-file and --dump-stats accept config path expansion (#3591)
• options: deprecate --playlist-pos to --playlist-start
• options: make input options generally runtime-settable
• options: rename subtitle options (--sub-text- → --sub; --ass- → --sub-ass-)
• osc: change default layout to bottombar, seekbarstyle to bar, use larger scalewindowed and scalefullscreen
• player: make --terminal, --log-file, --dump-stats, --osc, --ytdl, --audio-*, --priority, --stop-screensaver (#3615) settable at runtime
• vo_drm: change CLI options
  • Change connector selection to accept human readable names (such as eDP-1, HDMI-A-2) rather than arbitrary numbers.
  • Change GPU selection to accept GPU number rather than device paths.
  • Merge connector and GPU selection into one --drm-connector.
  • Add support for --drm-connector=help.
  • Add support for --drm-* in EGL backend.
• vo_opengl: rename 3dlut-size to icc-3dlut-size

Removed

• command: remove hwdec-active and hwdec-detected properties
• command: remove vo-cmdline
• options: drop unreferenced --bluray-angle option
• vo, ao: disable positional parameter suboptions
• vo_xv: replace no-colorkey with ck-method=none

Deprecated

• all VOs and AOs: deprecate sub-options, add them as global options
• command: deprecate "cache" property, replace with "cache-percent"
• deprecate --vo-defaults
• deprecate --vo=opengl-hq alias in favor of opengl-hq profile
• options: deprecate --mute=auto
• vo_direct3d: deprecate direct3d_shaders alias, use shaders by default
• vo_opengl: deprecate 'drm-egl' backend and introduce 'drm' instead

Fixes and Minor Enhancements

• TOOLS/zsh.pl: die if we can't parse main options
• TOOLS/zsh.pl: don't filter files by extension (#2273)
• ao_alsa: try to fallback to "hdmi" before "iec958" for spdif
• ao_rsound: fix compilation (#3501)
• aspect: use nominal width instead of actual width for video-unscaled
• audio/out: prevent underruns with spdif under certain conditions
• audio: fix late audio start (#3610)
• audio: fix missed wakeup when changing audio output device
• audio: fix segfault when yanking USB DAC
• charset_conv: Use CP949 instead of EUC-KR
• command: don't log "ignore" command with -v verbosity
• command: try selecting the next track if track switching fails (#3446)
• demux_mkv: don't crash if --ordered-chapters-files fails
• displayconfig: treat a refresh rate of 1 as invalid
• ipc: log when listening to IPC socket (#3598)
• macOS: fix fullscreen regression on 10.11 and newer (#3364)
• mp_image: fix clearing to black with p010 format
• osc: Fix scaling issues when toggling fullscreen (#3429)
• osc: align text vertically in top/bottombar (#2093)
• osc: change seekbar background's alpha scaling
• osc: fix display of chapters and playlist scaling
• osc: move tooltip to inside seekbar for top/bottombar
• osc: show playlist/chapter list on prev/next instead of osd
• path: default ~~ paths to home directory (#3591)
• player: do not let pseudo-gui override user config settings
• player: enable reading from stdin after loading input.conf
• player: fix instant subtitle refresh on track switches
• player: make --force-window work with opengl-cb
• stream_file: don't use poll() on directories (would hang on macOS; #3530, #3649)
• stream_lavf: fix determining seekability (#1701)
• sub: actually apply text alignment options to non-ASS subtitles
• terminal-win: support modifier keys in console input (#3625)
• vo_drm: fix segfault when using invalid card
• vo_opengl: apply 90° rotation to chroma texture size (#3568)
• vo_opengl: fix incorrect video rendering after vdpau preemption recovery
• vo_opengl: partially fix dumb-mode cropping with rotation
• vo_opengl: rpi: use overlay for yuv420p too
• w32_common: initialize playback status as soon as possible (#3482)
• wayland: reject resize events with either dimension being 0 (#3679)
• x11: fix external fullscreen update (#3570)
• ytdl_hook: Add title to playlist items if available
• ytdl_hook: Set aspect ratio for anamorphic video
• ytdl_hook: Support playlist entries without subtitles
• ytdl_hook: add chapters by parsing video's description
• ytdl_hook: don't add subtitles with unknown duration
• ytdl_hook: temporarily force disable dash segments formats

This listing is not complete. Check DOCS/client-api-changes.rst for a history of changes to the client API, and DOCS/interface-changes.rst for a history of changes to other user-visible interfaces.

A complete changelog can be seen by running git log v0.20.0..v0.21.0 in the git repository or by visiting either https://github.com/mpv-player/mpv/compare/v0.20.0...v0.21.0 or https://git.srsfckn.biz/mpv/log/?qt=range&q=v0.20.0..v0.21.0