When comparing Swinsian vs IINA, the Slant community recommends IINA for most people. In the question“What are the best music players for OSX ?” IINA is ranked 2nd while Swinsian is ranked 8th. The most important reason people chose IINA is:
It's like mpv, just more user friendly GUI and more settings available via UI.
Ranked in these QuestionsQuestion Ranking
Pros
Pro Works well with huge libraries
Pro .flac support
Pro Very light for the OS
Pro Album art fetching
Pro Smart playlists
Pro Good value for money, paying is common sense
Spotify and others are music on the street and a sore for the eyes.
Pro Clear interface with lists and words!
Pro Playlist view customisation
Pro DSD/DFF file support
Pro Last.fm scrobbling
Pro Can add lyrics
Pro Watches any folders
Pro Like MPV with better GUI and settings
It's like mpv, just more user friendly GUI and more settings available via UI.
Pro Extremely stable
Extremely stable, even while still in the beta.
Pro Support for lots of codecs
Supports lots of video codecs, like mp4, mkv, etc, and lots of audio codecs including opus.
Pro Doesn't black out other displays when going full screen
It can black out other screens if you want, but out of the box it leaves your other displays alone.
Pro Runs on MPV so it's scriptable and runs any MPV script.
More information here.
Tip: if you're doing a lot of cropping and slicing of videos and you thought the new quick tools in Finder / Quicktime Player are a great improvement, try setting up IINA with slicing.lua and some keybindings for navigating your video + setting the slicing positions.
Make sure your ffmpeg command (in slicing.lua) is set to copy the original codecs and that it's using your GPU.
Pro Online subtitle searching and intelligent local subtitle matching
Pro Fully customizable keyboard, mouse, trackpad, and gesture controls
Pro Open source
Pro Powered by FFmpeg
Cons
Con Stuck on Intel SOC
Needs Rosetta to work on Apple silicon.
Con Expensive
Con No ReplayGain support
Con No dark mode (yet)
Con Cannot export to mp3 devices
Con Inexplicably refuses to play some files
Swinsian won't play ~1/3 of my flacs. Their support says "works for us". Tried rebuilding library etc, nothing worked. Eventually gave up and stopped using it.
Con Unstable
May crash unexpectedly, while clicking on something in the subtitles section in the right-hand panel, for example.