streamlink --player-fifo https://www.twitch.tv/channelName best
[cli][info] Found matching plugin twitch for URL https://www.twitch.tv/channelName 
[cli][info] Available streams: audio_only, 160p (worst), 360p, 480p, 720p, 720p60, 1080p60 (best)
[cli][info] Opening stream: 1080p60 (hls)
[cli][info] Creating pipe streamlinkpipe-1140
[cli][info] Starting player: "c:\Programs\MPV\mpv.exe"
error: Failed to start player: "c:\Programs\MPV\mpv.exe" (Process exited prematurely)
[cli][info] Closing currently open stream...