dubb-ffmpeg

#!/bin/bash
## To calcuate bitrate :- (finished size MB x 1024 x 8 / ( time in sec ))  - audio bitrate

# include some colours
. ~/.shell-colors

echo "                  ********"
if [ -z "$1" ]; then 
    printf "$green           dubb-ffmpeg - a 2-pass video encoder \n"
    printf "$yell       *** usage: dubb-ffmpeg movie.<ext> *** \n"
    exit
fi
printf "$green We are converting any video file to xvid cd sized avi as a default. \n"
printf "$yell       All options are changeable \n"
printf "$yell      The file info we need :- \n"
printf "$white    [ The important lines start with   Stream ] \n"
##access the working movie title ##
movie_name="$1"
printf "\n $cyan      ******** \n"
##this gives the various video/audio settings for the input file##
ffmpeg -i "$movie_name"
echo "       ********"
##Defaults ##
size="720x404"
aspect="16:9"
mp3rate="96"
fps="25"
start=""
time=""
bitrate="1000"

###****************************************************
##if we change a default we call the options again for more changes ##
function change_more {
if [ "$input" = "" ] ; then
    move_on
else
    changing_defaults
fi
}
###***************************************************
##tell about defaults and take default to change ##
function change_defaults {
display_values;
printf "$yell \n Values to be used are shown in $cyan [] $yell :- \n"
printf " 1. MP3 bitrate $cyan [$mp3rate] $yell - it is set to stereo as well \n"
printf " 2. Aspect ratio $cyan [$aspect] $yell - normally 4:3 or 16:9 \n"
printf " 3. Frame size/resolution $cyan [$size] $yell - to work with the aspect ratio [$aspect] \n"
printf " 4. Audio sync level $cyan [$fps] $yell - important to get the sound synced properly  \n"
printf " 5. Start $cyan [$start] $yell - To cut the first xxx sec of the file. Blank to encode from start \n"
printf " 6. Time $cyan [$time] $yell - Blank to record whole file - 00:00:00 format used for hour or min \n"
printf " 7. Bitrate $cyan [$bitrate] $yell - Higher = better quality - lower = smaller file size \n"
echo " To change a default type the corresponding number and hit enter"
echo "  or hit enter to continue conversion"
read input
change_more
}
###***************************************************
##change default values ##
function changing_defaults {
printf $green
case $input in
    1) echo "  Add New MP3 Bitrate - Common rates are 96, 128, 160, 192,256"
         read newmp3
         mp3rate=$newmp3
         change_defaults ;;
    2) echo "  Add new asdpect ratio - usually 16:9 or 4:3"
         read newaspect
         aspect=$newaspect
         change_defaults ;;
    3) echo "  Add new Resolution - sizes are best if divisble by 16"
         read newsize
         size=$newsize
         change_defaults ;;
    4) echo "  Add new Audio sync level - FPS/25 is fine"
         read newfps
         fps=$newfps
         change_defaults ;;
    5) echo "  Add -start encoding from time- in secs"
    	read newstart
    	start=$newstart
    	change_defaults ;;
    6) echo "  Add time required - for samples or testing"
         read newtime
         time=$newtime
         change_defaults ;;
    7) echo "  Add bitrate required - for quality or file size"
         read newbitrate
         bitrate=$newbitrate
         change_defaults ;;
    *) echo " Oops.. Must supply a correct option or just hit enter"
         change_defaults ;;
esac
}
###*******************************************************
##self explanitory ##
function display_values {
    title="   Settings to be used or changed:"
    values="   MP3Bit/R - $mp3rate , Asp/R - $aspect ,  , Res - $size , FPS - $fps, Bitrate - $bitrate"
    printf "\n $purp $title "
    printf " \n $red $values \n"
}
###*******************************************************
##do the work converting the video/audio ##
function move_on {
display_values;
printf "\n"
##set the values used in ffmpeg ##
setsize="-s $size"
setaspect="-aspect $aspect"
mp3rate=$(($mp3rate * 1000))
setmp3rate="-ab $mp3rate"
setfps="-async $fps"
setbitrate=$(($bitrate*1000))
if [ "$start" = "" ]; then
    setstart=""
else
    setstart="-ss $start"
fi
if [ "$time" = "" ]; then
    settime=""
else
    settime="-t $time"
fi
## Sort out the file name ##
name=$(echo "$movie_name" | sed -e 's/ /_/g' | tr - _)
moving=`date +%b%d-%H%M`
[ -f ~/$name.1.avi ] && mv -v ~/$name.1.avi ~/$moving$name.avi && \
	printf "$cyan Lookit above ^^!! \n $reset" || \
	printf "$cyan Nothimg to see here - move along... \n"
name=$name.1.avi

## set up the timing ##
 starting_time=`date +%s`
printf "$yell *** Working on :-  $name *** "
printf "$yell \n *** Starting pass 1 *** \n"
printf "$green \n \n"

nice -n 8 ffmpeg -i "$movie_name" -y -pass 1 -threads 3 $setstart $settime $setsize $setaspect $setfps -f avi -vcodec mpeg4 -b:v $setbitrate -qmax 9 -dc 10 -bf 2 -g 250 -acodec copy /dev/null

 middle_time=`date +%s`
answer=$(($middle_time-$starting_time))

[ "$answer" -ge "61" ] && \
	minutes=$(($answer/60)) && seconds=$(($answer-($minutes*60))) && \
	printf " \n $cyan  $minutes mins $seconds secs so far... \n" || \
	printf "\n $cyan $answer secs so far... \n"

printf "\n $yell *** Saving to :-  $name *** "
printf "\n  *** Starting pass 2 ***\n $green \n"

nice -n 8 ffmpeg -i "$movie_name" -pass 2 -threads 3 $setstart $settime $setsize $setaspect $setfps -f avi -vcodec mpeg4 -b:v $setbitrate -qmax 9 -dc 10 -bf 2 -g 250 -acodec libmp3lame $setmp3rate -ac 2 -vol 512 $name 

 end_time=`date +%s`
answer=$(($end_time-$starting_time))

[ "$answer" -ge "60" ] && \
	minutes=$(($answer/60)) && seconds=$(($answer-($minutes*60))) && \
	printf "\n $cyan   $minutes mins $seconds secs overall... \n \n" || \
	printf "\n $cyan $answer seconds overall... \n\n"

printf "  $yell   *** Finished encoding now deleting temporary files *** \n"
rm -v ffmpeg2pass-0.log &> /dev/null
printf "\n    ***    $name     *** \n"
printf "\n    *** Done - Bye ! *** \n\n"
printf '\033[0m' # return the prompt to orig
exit 0
}
###************************************************
##start the ball rolling ##
change_defaults