#!/bin/sh


# Nautilus-script's MPEG2XviD script v1.0a by Marco Luethy ( http://marco.luethy.net/ )
# Licenced under the GPL
# Requires transcode and xterm 

# INSTALLATION
# Install (or, rather copy) script to ~./.gnome2/nautilus-scripts. Right click on a file you wish
# to transcode and go to the "Scripts" option, and select the MPEG2XviD script. If the "Scripts" 
# option does not appear underneath "Create Folder" when right-clicking, in Nautilus's address
# bar, go to the folder ~./.gnome2/nautilus-scripts


# PRESET VARIABLES
# For convenience you may want to change these variables to fit your system.
tmp_dir="/tmp/encoding"
default_indir=`pwd`
default_outdir="/media1/new"


# I/O
# Script's support for transcode. Might be a good idea to auto-detect input, and let user choose output.
# this would make the script not just a MPEG2 to XviD script, but anything to anything supported by transcode.
decode="mpeg2"
decode_name="MPEG2"
encode="xvid4"
encode_name="XviD"
 

# DYNAMIC VARIABLES
# No change should be needed here.
file_input="$default_indir/$1"
file_output_t=`echo $1 | sed 's/.mpg/ (XviD).avi/'`
file_outdir="`gdialog --title "Output Directory" --inputbox "Save output in directory:" 25 25 "$default_outdir" 2>&1`"
file_output="`gdialog --title "Output File" --inputbox "Save output to:" 25 25 "$file_output_t" 2>&1`"






if `gdialog --title "Begin Transcoding?" --yesno "Setup complete!\nInput: $file_input\nOutput: $file_outdir/$file_output\n\nDoes this sound right?" 25 25`
    then 
        mkdir $tmp_dir

#<tibit> Mpegs are usually coded anamorph, that means you should rescale the video when transcoding to xvid
#<tibit> I would suggest -Z 640x,fast If you leave out the height of -Z, transcode tries to be smart and guesses it based on the import aspect rati

#<tibit> regarding the segfault: chech the exit code `$?' it will be different form a canceled exit and a segfault

# -R n[,f1[,f2]]      enable multi-pass encoding (0-3) [0,divx4.log,pcm.log]  (SEE dvdrip implementation)
#--config_dir dir     Assume config files are in this dir [off]

# Audio/video bitrate>filesize conversions.
# Audio: 45 bytes * # of frames + 12kb * # of seconds
#<eclipse> and you just have to get all your units to megabytes in there
#<eclipse> and then you take your target file size subtract that #
#<eclipse> and then you take tha file size
#<eclipse> turn it into kilobits
#<eclipse> and divide by # of seconds in the movie
#<eclipse> and that's about it
#<eclipse> it's off by 5-10 kbps cause they do some rounding I don't see
#<eclipse> and then you take your target
#<eclipse> and subtract your audio
#<eclipse> and that's your video
#<eclipse> and you turn that into kbps
#<eclipse> from megabytes
#<eclipse> just *1024 * 8
#<eclipse> and then divide by total seconds

        if `xterm +sb -geometry 70x5 -title "Transcoding (encoding $decode_name to $encode_name) $file_output_t" -e "transcode -i '$file_input' -x $decode -o '$tmp_dir/$file_output' -y $encode --a52_drc_off -E 44100 -J resample -b 96,0,0 -w 1024 -V"`
		    then task=1
			else
			    gdialog --title "Error!" --msgbox "An error has occured." 25 25
			    exit
		fi
        mv "$tmp_dir/$file_output" "$file_outdir/$file_output"
        if `gdialog --title "Transcoding Completed." --defaultno --yesno "Transcoding from $decode_name to $encode_name complete.\nInput: $file_input\nOutput: $file_outdir/$file_output\n\nDelete Original file?\nNOTE: Check new file before deleting old." 25 25`
            then
			    rm -Rf "$file_input"
				exit
			else exit
		fi
    else gdialog --title "Transcoding Canceled" --msgbox "Transcode script canceled." 25 25
fi








#FILE_INPUT="/media1/new/Star Trek Voyager - 7x15 - The Void_L001.avi"
#DATA=`tcprobe -i "$FILE_INPUT" | tail -c 56 | sed -e 's/[^:]//' -e 's/[=]//g' -e 's/[_]//g' -e 's/[ *][a-zA-z]*//g' -e 's/[,]/ /g'`

#DURATION=`echo $DATA | awk '{print $3 ; }' | sed -e 's/[:]/ /g'`


#FRAMES=`echo $DATA | awk '{print $1 ; }'`
#HOUR=`echo $DURATION | awk '{print $1 ; }'`
#MIN=`echo $DURATION | awk '{print $2 ; }'`
#SEC=`echo $DURATION | awk '{print $3 ; }'`


#TARGET_SIZE=200
#AUDIO_BITRATE=96



## if SEC contains a decimal, SEC is chopped off at decimal, and incremented. 23.33 becomes 24
#SECONDS=$(( ($HOUR*60*60)+($MIN*60)+$(( `echo $SEC | sed -e 's/[.]/ /g' | awk '{ print $1 ; }'`+1   )) ))

#MB_AUD=$(( (((60*$FRAMES)/1024)/1024)+((($AUDIO_BITRATE/8)*$SECONDS)/1024) ))
#MB_VID=$(( $TARGET_SIZE-$MB_AUD ))
#VIDEO_BITRATE=$(( ((($MB_VID*1024*8)/$SECONDS)+10) )) 

#echo "Data: $DATA"
#echo "Duration: $SECONDS s"
#echo "Audio size: $MB_AUD MB"
#echo "Video size: $MB_VID MB"
#echo "Video Bitrate: $VIDEO_BITRATE kbps"