[haasn]

SMPlayer can barely even be considered an mpv front-end and I hope nobody who uses it will ever make an mpv bug report again. It's a gigantic pile of hacks from the MPlayer age, and it “interfaces” with mpv using the most horrible method possible (embedding the mpv window and sending keystrokes to it)

[glebm]

Perhaps from the implementation standpoint, but from the user standpoint it's second to none. For example, it's the only one I know that supports dual subtitles (--secondary-sid in mpv). For more advanced features, it also allows you to pass CLI flags to mpv, e.g. for things like `--video-stereo-mode=sbs2l` (subtitles and UI for 3D videos).

Also, enable "Run mpv in its own window" under Preferences -> Advanced. This removes all the issues caused by the default mode of embedding the mpv window (such as subtitles being on the video and not in the black bars).

Thank you for your work on mpv!