Video player need these Feature

libass
"--enable-libass --enable-filter=subtitles"

libfreetype
"--enable-filter=drawtext --enable-libfreetype --enable-muxer=ass --enable-demuxer=ass --enable-muxer=srt --enable-demuxer=srt --enable-muxer=webvtt --enable-demuxer=webvtt --enable-encoder=ass --enable-decoder=ass --enable-encoder=srt --enable-decoder=srt --enable-encoder=webvtt --enable-decoder=webvtt"

fontconfig
"--enable-fontconfig"

FFmpeg Official version