Log Message:
mpv: Update multimedia/mpv to 0.29.0

pkgsrc changes:
 - Drop sdl option, SDL1 is no longer supported by mpv (was used only for
   audio)

Changes:
0.29.0
======
This release requires FFmpeg 4.0 or newer.

Features
--------
Added
~~~~~
- ao/openal: Add better sample format and channel layout selection
- ao/openal: Add support for direct channels output
- cocoa-cb: initial implementation via opengl-cb API
- context_drm_egl: Introduce 30bpp support (requires Mesa 18.0.0_rc4 or later)
- osx: add some more menu bar items as suggested by Apples's HIG
- vo_gpu: make screenshots use the GL renderer (#5498, #5240)
- x11: support Shift+TAB as an input key bind (#5849)
- ytdl_hook: support native dash demuxer, if present

Changed
~~~~~~~
- ao_alsa, ao_pulse: reduce requested buffer size
- audio: change format negotiation, remove channel remix fudging
- client API: deprecate opengl-cb API and introduce a replacement API
- demux: lower demuxer cache default sizes from 400MB/400MB to 50MB/150MB
- osx: always deactivate the early opengl flush on macOS
- scripting: change when/how player waits for scripts being loaded
- vo_gpu: various improvements to HDR peak detection
- vo_gpu: various improvements to HDR tone mapping
- wayland_common: update to stable xdg-shell
- ytdl_hook: parse youtube playlist urls to set start index if \ 
`--ytdl-raw-option=yes-playlist=` is specified

Deprecated
~~~~~~~~~~
- af_lavrresample: deprecate this filter

Removed
~~~~~~~
- build: drop support for SDL1 (only applied to ao_sdl)

Options and Commands
--------------------
Added
~~~~~
- add a number of --audio-resample-* options, which should from now on be used \ 
instead of --af-defaults=lavrresample:
- ao/openal: --openal-direct-channels
- command: add --osd-on-seek option defaulting to bar
- command: add a change-list command (#5435)
- options: add --http-proxy
- options: add a builtin low-latency profile
- vaapi: add option to select a non-default device path with --vaapi-device (#4320)
- video: add option to reduce latency by 1 or 2 frames
- vo_gpu: introduce --target-peak (#5521)

Changed
~~~~~~~
- command: change cycle-value command behavior (#5772)
- config: replace config dir lua-settings/ with dir script-opts/
- options: --lavfi-complex now requires uniquely named filter pads.
- options: --ytdl is now always enabled, even for libmpv
- options: make --deinterlace=yes always deinterlace (#5219)
- options: slightly improve filter help output for lavfi bridge
- vo: rename --vo=opengl-cb to --vo=libmpv

Deprecated
~~~~~~~~~~
- encoding: deprecate a bunch of obscure options (--ovoffset, --oaoffset, \ 
--ovfirst, --oafirst)
- options: deprecate --vf-defaults and --af-defaults
- osx: --gpu-context=cocoa with --gpu-api=opengl is now deprecated in favour of \ 
--vo=libmpv

Removed
~~~~~~~
- command: remove an old compatibility hack that allowed CLI aliases to be set \ 
as property, deprecated in 0.26.0
- input: remove legacy command handling for MPlayer commands that were \ 
deprecated in 2013
- options: drop --opensles-sample-rate, as --audio-samplerate should be used if \ 
desired
- options: drop deprecated --videotoolbox-format, --ff-aid, --ff-vid, --ff-sid, \ 
--ad-spdif-dtshd, --softvol options
- options: remove --video-stereo-mode
- options: remove deprecated ao/vo auto profiles
- options: remove the following encoding options: --ocopyts (now the default, \ 
old timestamp handling is gone), --oneverdrop (now default), --oharddup (you \ 
need to use --vf=fps=VALUE), --ofps, --oautofps, --omaxfps

Fixes and Minor Enhancements
----------------------------
- HIDRemote: fix volume buttons on macOS 10.13 (#5721)
- TOOLS/autoload: Fix broken "disabled" option
- TOOLS/autoload: be more robust with slow directory listings (#5618)
- ao_sdl: fix default buffer size
- build: add static libraries to libmpv.pc
- build: bump waf to 2.0.9 (fixes Python 3.7 compatibility)
- build: manually add standard library search paths for linking (#5791)
- common: round all integer times to milliseconds
- demux, player: fix playback of sparse video streams (w/ still images)
- demux: support for some kinds of timed metadata (e.g. ICY)
- demux_mkv: add V_AV1 identifier for AV1
- demux_mkv: support Meridian Lossless Packing in Matroska (#5923)
- display additional metadata tags during video playback
- drm_atomic: Fix memory leaks in drm_atomic_create
- enable cache for FUSE filesystems on OpenBSD and FreeBSD
- gpu: prefer 16bit floating point FBO formats to 16bit integer ones
- hwdec_vaegl: Fix VAAPI EGL interop used with gpu-context=drm
- input.conf: use exact value for [ binding, which does the inverse of ]
- input: add a keybinding to toggle hardware decoding
- input: minor additions to default key bindings (#973)
- osc: fix accidentally skipping files when seeking with slider
- player: fix strange behavior on edition switching
- player: fix track autoselection of external files yet again
- terminal-unix: stop trying to read when terminal disappears (#5842)
- video: actually wait for last frame being rendered on EOF
- video: fix --video-rotate in some cases
- video: fix crash with vdpau when reinitializing rendering (#5447)
- vo_gpu: fix anamorphic screenshots (#5619)
- vo_vdpau: fix resizing and rotation problems