Scripts to convert a directory of mp4 files to SD mpg files.

convert_to_sd.sh

#!/bin/sh
SRCFILE=$1
DSTFILE=$2

# Sanity checking, to make sure everything is in order.
if [ -z "$SRCFILE" -o -z "$DSTFILE" ]; then
   echo "Usage: $0 <Source File> <Destination File>"
   exit 5
fi
if [ ! -f "$SRCFILE" ]; then
   echo "File does not exist: $SRCFILE"
   exit 6
fi

vidinfo=`ffmpeg -i $SRCFILE 2>&1 | grep Video:`
width=`echo "$vidinfo" | sed "s/.* \([1-9][0-9]*\)x\([0-9]*\).*/\1/"`
height=`echo "$vidinfo" | sed "s/.* \([1-9][0-9]*\)x\([0-9]*\).*/\2/"`

if [ "$width" -gt 720 -o "$height" -gt 480 ]; then
   ionice -c3 nice -19 ffmpeg -i $SRCFILE -vf "yadif, scale=-1:480" -vcodec mpeg2video -r 29.97 -qscale 4 -bf 2 -acodec mp2 -ac 2 -ar 48000 -ab 128k -y $DSTFILE
else
   ionice -c3 nice -19 ffmpeg -i $SRCFILE -vf yadif -vcodec mpeg2video -qscale 4 -bf 2 -acodec mp2 -ac 2 -ar 48000 -ab 128k -y $DSTFILE
fi

# Make sure the transcode succeeded.
if [ ! -f $DSTFILE ]; then
   echo "Transcode Failed"
   exit 7
fi

process_videos.sh

#!/bin/bash

SRCDIR=$1
DSTDIR=$2

# Sanity checking, to make sure everything is in order.
if [ -z "$SRCDIR" -o -z "$DSTDIR" ]; then
   echo "Usage: $0 <Source Directory> <Destination Directory>"
   exit 5
fi
if [ ! -d "$SRCDIR" ]; then
   echo "Source directory does not exist: $SRCDIR"
   exit 6
fi
if [ ! -d "$DSTDIR" ]; then
   echo "Destination directory does not exist: $DSTDIR"
   exit 6
fi


shopt -s nullglob
for srcfile in $SRCDIR/*.mp4
do
   # Cleanup the file name
   dstfile=`echo $srcfile | tr ' ' '_' | tr -d '[{}(),\!]' | tr -d "\'" | tr '[A-Z]' '[a-z]' | sed 's/_-_/_/g'`
   dstfile=${srcfile%.*}
   dstfile=${dstfile##*/}
   dstfile="$DSTDIR/$dstfile.mpg"

   echo "Convert $srcfile to $dstfile"
   
   ./convert_to_sd.sh $srcfile $dstfile
done