When MPlayer play AVI, the default volume is small, even if the maximum volume is toned, it is not as big as Media Player Classic, huh, it is actually modified MPLAYER.INI Dafa Add AF = Volume: VAF to represent Audio Filter, v is decibel Value, -200 indicates complete mute, 60 indicates an increase to 1000 times the amount of the original volume, 10 (60/20) = 1000, huh, it is generally set to 10 decibels, if there is an option, such as AF = Volnorm, Volume parameters and original parameters, (comma) can be separated, ie AF = Volnorm, Volume = 10
OK, now the video proportional disorder and the problem of small sound are solved, enjoy your MPlayer.