I have wrote a bash script for myself that uses file to get the real extension of the video file types and changes the extension properly.
Furthermore the script uses the ffmpeg2theora to convert avi and mpeg files to ogg to reduces memmory space.
It could be put as an example on the wiki...
#!/bin/bash
#
# get_real_content_and_try_to_compress.sh - converts the extension to reflect the real content and try to convert the videos to ogg to save memmory space
# Used in conjuction with aMule's Event feature
#
# Call like this: getRealExtensionAndVideoCompressor.sh "%NAME" "%FILE"
#
#
ShortFilename=$1
FullPathFilename=$2
{
echo aMule completed this download:
echo ------------------------------
echo
echo File: "$FullPathFilename"
echo --------------------------------------------------------------------
}
ASF_FILE_DESCRIPTION="Microsoft ASF"
AVI_FILE_DESCRIPTION="RIFF (little-endian) data, AVI"
MPEG_FILE_DESCRIPTION="MPEG sequence"
OGG_FILE_DESCRIPTION="Ogg data, Theora"
ASF=`file "$FullPathFilename" | grep -i -n $ASF_FILE_DESCRIPTION | wc -l`
AVI=`file "$FullPathFilename" | grep -i -n $AVI_FILE_DESCRIPTION | wc -l`
OGG=`file "$FullPathFilename" | grep -i -n $OGG_FILE_DESCRIPTION | wc -l`
MPEG=`file "$FullPathFilename" | grep -i -n MPEG_FILE_DESCRIPTION | wc -l`
if [ "$ASF" -gt "0" ]; then
TYPE="asf"
#Replaces the old extension by the real found
NEW_FILENAME=`echo "$ShortFilename" | sed "s/\(\.\)\?\(ogg\|avi\|wmv\|mpg\|mpeg\|asf\)\?$/.$TYPE/i"`
if [ "$ShortFilename" != "$NEW_FILENAME" ]; then
mv -v "$ShortFilename" "$NEW_FILENAME"
ShortFilename=$NEW_FILENAME
fi
if [ "$MPEG" -gt "0" ]; then
TYPE="mpeg"
#Replaces the old extension by the real found
NEW_FILENAME=`echo "$ShortFilename" | sed "s/\(\.\)\?\(ogg\|avi\|wmv\|mpg\|mpeg\|asf\)\?$/.$TYPE/i"`
if [ "$ShortFilename" != "$NEW_FILENAME" ]; then
mv -v "$ShortFilename" "$NEW_FILENAME"
ShortFilename=$NEW_FILENAME
fi
if [ "$AVI" -gt "0" ]; then
TYPE="avi"
#Replaces the old extension by the real found
NEW_FILENAME=`echo "$ShortFilename" | sed "s/\(\.\)\?\(ogg\|avi\|wmv\|mpg\|mpeg\|asf\)\?$/.$TYPE/i"`
if [ "$ShortFilename" != "$NEW_FILENAME" ]; then
mv -v "$ShortFilename" "$NEW_FILENAME"
ShortFilename=$NEW_FILENAME
fi
if [ "$OGG" -gt "0" ]; then
TYPE="ogg"
#Replaces the old extension by the real found
NEW_FILENAME=`echo "$ShortFilename" | sed "s/\(\.\)\?\(ogg\|avi\|wmv\|mpg\|mpeg\|asf\)\?$/.$TYPE/i"`
if [ "$ShortFilename" != "$NEW_FILENAME" ]; then
mv -v "$ShortFilename" "$NEW_FILENAME"
ShortFilename=$NEW_FILENAME
fi
#Trying to convert to ogg to save space. We will try to convert just the mpeg and avi files
if [ "$MPEG" -gt "0" -o "$AVI" -gt "0" ]; then
TYPE="ogg"
NEW_FILENAME=`echo "$ShortFilename" | sed "s/\(\.\)\?\(ogg\|avi\|wmv\|mpg\|mpeg\|asf\)\?$/.$TYPE/i"`
CURRENT_SIZE=`ls -s "$ShortFilename"| cut -f1 --delim=" "`
if [ -f "$NEW_FILENAME" ];
then
echo "Ogg correspondig file \'$NEW_FILENAME\'already exists... Then we will not try to convert to ogg..."
else
# Converting the video to ogg format
echo "ffmpeg2theora $ShortFilename"
ffmpeg2theora "$ShortFilename"
fi
OGG_FILE_SIZE=`ls -s "$NEW_FILENAME" | cut -f1 --delim=" "`
DECREASED_SIZE=$((CURRENT_SIZE - OGG_FILE_SIZE))
# The factor to decrease the size of the file to consider a significant reduce
DECREASE_FACTOR=2
SIGNIFICANT_REDUCE=`echo "$CURRENT_SIZE > ${DECREASE_FACTOR} * $OGG_FILE_SIZE" | bc -l`
echo "OLD SIZE: $CURRENT_SIZE NEW SIZE: $OGG_FILE_SIZE DIFFERENCE SIZE: $DECREASED_SIZE SIGNIFICANT REDUCE? $SIGNIFICANT_REDUCE"
if [ "$SIGNIFICANT_REDUCE" -eq "0" ];
then
echo "$NEW_FILENAME" >> to_exclude_files.txt
else
echo "$ShortFilename" >> to_exclude_files.txt
fi
fi
