bash-completion doesn't recognize .flac as an extension that can be player by mplayer this is quite anoying solution: in /usr/portage/app-shells/bash-completion/files/20050121/04_all_mplayer.diff change the line: + _filedir '@(mp3|MP3|mpg|MPG|ogg|OGG|wav|WAV|mid|MID)' to + _filedir '@(mp3|MP3|mpg|MPG|ogg|OGG|wav|WAV|mid|MID|flac|FLAC)'
also change the line _filedir '@(mp?(e)g|MP?(E)G|wm[av]|WM[AV]|avi|AVI|asf|ASF|vob|VOB|bin|BIN|dat|DAT|vcd|VCD|ps|PS|pes|PES|fli|FLI|viv|VIV|rm?(j)|RM?(J)|ra?(m)|RA?(M)|yuv|YUV|mov|MOV|qt|QT|mp[34]|MP[34]|og[gm]|OG[GM]|wav|WAV|dump|DUMP|mkv|MKV|m4a|M4A|aac|AAC|m2v|M2V|dv|DV|mid|MID|ts|TS)' to _filedir '@(mp?(e)g|MP?(E)G|wm[av]|WM[AV]|avi|AVI|asf|ASF|vob|VOB|bin|BIN|dat|DAT|vcd|VCD|ps|PS|pes|PES|fli|FLI|viv|VIV|rm?(j)|RM?(J)|ra?(m)|RA?(M)|yuv|YUV|mov|MOV|qt|QT|mp[34]|MP[34]|og[gm]|OG[GM]|wav|WAV|dump|DUMP|mkv|MKV|m4a|M4A|aac|AAC|m2v|M2V|dv|DV|mid|MID|ts|TS|flac|FLAC)' in /etc/bash_completion
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