flvファイルを固定時間ごとに分割

Google Tech Talksなどの巨大な動画ファイルを5分ごとなどの短い動画に分割するスクリプト。

#!/bin/bash
# div_movies.sh
# This is a script to divide movies by the unit of particular times.
# The divided files are named "01_movies.flv, 02_movies.flv,..."

MOVIE_NAME="movie.flv" # Original movie filename
MOVIE_TIME=6000 # Total time of the movie [sec]
DIVIDE_TIME=300 # The unit time of the divided movies [sec]

#Initialization
MOVIE_NUM=01 
START_TIME=0 

while [ 1 ]
do

# A case if you don't modify video/audio encoding
#mencoder -oac copy -ovc copy -ss $START_TIME -endpos $DIVIDE_TIME \
#-o ${MOVIE_NUM}_$MOVIE_NAME $MOVIE_NAME

# A case if you change video encoding from flv to mpeg4 
mencoder -oac mp3lame -ovc lavc -ss $START_TIME -endpos $DIVIDE_TIME \
-o ${MOVIE_NUM}_${MOVIE_NAME%.flv}.mpg $MOVIE_NAME

START_TIME=$(expr $START_TIME + $DIVIDE_TIME)

if [ $START_TIME -ge $MOVIE_TIME ]
then
exit
fi

MOVIE_NUM=$(expr $MOVIE_NUM + 1)
MOVIE_NUM=$(printf "%02d" $MOVIE_NUM)
 
done

This is a script to divide a flv file by the unit of particular time.