Notices

#! /bin/sh -f
if [ $1 == "-h" -o $1 == "--help" ]
then
   echo -e "\n \t \t Usage: mplayer-opt [FILENAME] \n"
   echo This script calls MPlayer with several optimizations 
   echo -e "\t to allow smooth playback of most content"
   echo -e "\t both with and without optimization"
   echo Known Issues: This script will not work with videos
   echo -e "\t whose aspect ratio has not been declared"
   echo Authors: Josiah Gaskin, Ilia Denotkine. Version: 0.4
   exit 0
fi
if [ $1 == "-o" -o $1 == "--original" ]
then
    NAME=$2
    echo -n Playing video without ANY modifications...
    mplayer "$NAME"
    exit 0
fi

if [ $# -eq 0 ]
then
    echo -n Please enter the name of the file: 
    read NAME
else
    NAME=$1
fi

echo Opening $NAME ...
PARAMS=$(mplayer -nosound -vo null -really-quiet -ss 01:00:00 -identify "$NAME" | awk '/ID_VIDEO_WIDTH/ { print substr( $PARAMS, 16, length($PARAMS) ) } /ID_VIDEO_FPS/ { print substr( $PARAMS, 14, length($PARAMS) ) } /ID_VIDEO_BITRATE/ { print substr( $PARAMS, 18, length($PARAMS) ) }')

BITRATE=`echo $PARAMS | cut -d " " -f 1`
WIDTH=`echo $PARAMS | cut -d " " -f 2`
FPS=`echo $PARAMS | cut -d " " -f 3 | cut -c-2`

echo -n Video width is $WIDTH, video bitrate is $BITRATE, video fps is $FPS

if [ $FPS -gt 25]
then
	HARD="hard"
else
	HARD=""
fi

if [ $FPS -lt 15 -o $BITRATE -lt 500000 ]
then
    echo -n ... playing file with original resolution
    mplayer -quiet -framedrop -noslices "$NAME"
    exit 0
fi

FAST="fast:"
MAX_WIDTH=800
if [ $BITRATE -lt 650000 ]
then
	if [ $WIDTH -gt 800 ]
	then
	    FULL=1
            echo -n ... reducing resolution to 1/2 of the original
    else
    	mplayer -quiet -"$HARD"framedrop -noslices "$NAME"
    	exit 0
    fi
else
	if [ $WIDTH -lt 800 ]
	then
		if [ $BITRATE -gt 65000 ]
		then 
			FULL=1
			echo -n ... reducing resolution to 1/2 of the original
		else 
			FULL=2
			echo -n ... reducing resolution to 1/4 of the original
		fi
	else
		if [ $WIDTH -gt `expr 4 \\* $MAX_WIDTH` -o $BITRATE -gt 3000000 ]
		then 
		    FULL=3
		    echo -n ... reducing resolution to 1/8 of the original
		elif [ $WIDTH -gt `expr 2 \\* $MAX_WIDTH` -o $BITRATE -gt 1024000 ]
		then
		    FULL=2
		    echo -n ... reducing resolution to 1/4 of the original
		elif [ $WIDTH -gt $MAX_WIDTH -o $BITRATE -gt 650000 ]
		then
		    FULL=1
		    echo -n ... reducing resolution to 1/2 of the original
		else 
		    FULL=0
		    FAST=""
		    echo ... playing file with original resolution
		fi
	fi
fi
mplayer -quiet -noslices -"$HARD"framedrop -lavdopts "$FAST"lowres="$FULL" "$NAME"