Script ffmpeg.sh
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#!/bin/bash if [ -z "$1" ] || [ -z "$2" ]; then echo "Usage: $0 <input-file> <output-file> [other-opts]"; exit -1; fi; if [ ! -x "`which ffmpeg`" ]; then echo "Can't find ffmpeg command"; exit; fi; if [ ! -f "$1" ]; then echo "Can't find input file"; exit; fi; OTHEROPTS="" ARRAY=("$@") COUNT=2 #while test $COUNT -lt $#; do while test $COUNT -lt "$#"; do OTHEROPTS="$OTHEROPTS ${ARRAY[COUNT]}"; COUNT=$((COUNT+1)); done; echo -e "input-file=\t$1" echo -e "output-file=\t$2" echo -e "other-opts=\t$OTHEROPTS" echo nice -5 ffmpeg -t 1 -i "$1" -f null - &> ___time.log; TIME=`cat ___time.log | grep Duration | cut -d . -f 1 | cut -d ' ' -f 4`; if [ $? -ne 0 ]; then echo "qualcosa e' andato storto durante la lettura della durata del filmato"; exit -1 fi; rm -f ___time.log; echo "movie time : $TIME"; SECONDS=$(( $(echo $TIME | cut -d : -f 1)*3600 + $(echo $TIME | cut -d : -f 2)*60 + $(echo $TIME | cut -d : -f 3) )); if [ $? -ne 0 ]; then echo "qualcosa e' andato storto durante il calcolo della durata in secondi"; exit -1 fi; echo "movie time in seconds : $SECONDS"; MAXSIZE=700 AUDIOBITRATE=128; VIDEOBITRATE=$(( ($MAXSIZE*1024*8) /$SECONDS - $AUDIOBITRATE)); # tolgo il 10% per essere sicuro che rientri in $MAXSIZE VIDEOBITRATE=$(($VIDEOBITRATE- ($VIDEOBITRATE/10))); echo "defined audio bitrate : $AUDIOBITRATE"; echo "extimated vidio bitrate : $VIDEOBITRATE"; echo echo echo ### Encoding in ONE pass nice -5 ffmpeg -i "$1" \ -f avi -deinterlace \ -vcodec mpeg4 -b $VIDEOBITRATE \ -acodec mp3 -ar 44100 -ac 1 -ab $AUDIOBITRATE \ $OTHEROPTS \ "$2" ### Encoding in TWO pass # 1st pass: the statistics of the video are recorded #nice -5 ffmpeg -i "$1" \ #-f avi -deinterlace \ #-vcodec mpeg4 -b $VIDEOBITRATE \ #-acodec mp3 -ar 44100 -ac 1 -ab $AUDIOBITRATE \ #-pass 1 -passlogfile ___ffmpeg.log \ #$OTHEROPTS \ #___pass1.avi # 2nd pass: the video is generated at the exact requested bitrate #nice -5 ffmpeg -i "$1" \ #-f avi -deinterlace \ #-vcodec mpeg4 -b $VIDEOBITRATE \ #-acodec mp3 -ar 44100 -ac 1 -ab $AUDIOBITRATE \ #-pass 2 -passlogfile ___ffmpeg.log \ #$OTHEROPTS \ #"$2" echo ls -sh "$2" #echo test #ffmpeg -t 10 -v 5 -i "$2" -f null - #rm -f ___test.avi ___ffmpeg.log #ffmpeg -i "$1" \ #-acodec mp3 -ar 44100 -ab $AUDIOBITRATE \ #-vcodec mpeg4 -hq -4mv -b $VIDEOBITRATE \ #-pass 1 -passlogfile ___ffmpeg.log \ #___test.avi ##ffmpeg -i "$1" \ ##-acodec copy \ ##-vcodec mpeg4 \ ##-pass 1 -passlogfile ___ffmpeg.log \ ##___test.avi #if [ $? -ne 0 ]; then # echo "qualcosa e' andato storto durante il primo passaggio della codifica!"; # exit -1 #fi; #ffmpeg -i "$1" \ #-acodec mp3 -ar 44100 -ab $AUDIOBITRATE \ #-vcodec mpeg4 -hq -4mv -b $VIDEOBITRATE \ #-pass 2 -passlogfile ___ffmpeg.log \ #"$2" # -s 352x288 \ #-an \ #-acodec mp3 -ar 44100 -ab $AUDIOBITRATE \ #-vcodec mpeg4 -hq -4mv -b $VIDEOBITRATE \ #-deinterlace -async 1 -s 640x460 \ #-croptop 110 -cropbottom 110 -cropleft 6 -cropright 6 \ #-pass 1 -passlogfile ___ffmpeg.log \ # End