stripping audios from video clips under linux

hexiang129UID: 2193160

I saw many people interested in the mp3 of "friends".
Here is the method I use to save audio stream of video clips(like friends, west wing, etc) under linux. It requires the newest version of  mplayer(the media player of linux), and lame(the mp3 encoder).
The following bash script will strip the sound of video clips stored in INPUT_DIR, pass them via a "pipe"  to "lame", who will re-encode them back into mp3, and store them in OUTPUT_DIR.

#!/bin/sh
# Be sure to change the following dir name to reflect the situation of ur system!!!
INPUT_DIR=/mnt/usbhd/emule_temp/incoming/clips
OUTPUT_DIR=/mnt/e/mp3/tmp
PIPE_NAME=/media/disk/amule_temp/incoming/test
BIT_RATE=64

#create the named pipe
mknod -m 666 $PIPE_NAME  p

#re-encoding the audio stream
for i in $INPUT_DIR/*;do
   echo $i;
   j=`basename $i '.rmvb'`;
   if ! [ -f "$OUTPUT_DIR/$j.$BIT_RATE.mp3" ]; then
       echo "recording $OUTPUT_DIR/$j.$BIT_RATE.mp3...";
       mplayer -vo null -vc dummy -ao pcm:file="$PIPE_NAME" $i > mlog.txt &
       lame -b $BIT_RATE "$PIPE_NAME" "$OUTPUT_DIR/$j.$BIT_RATE.mp3" &
       wait;
   else
       echo "$OUTPUT_DIR/$j.$BIT_RATE.mp3 already exist, skip";
   fi
done

[ 本帖最后由 hexiang129 于 2006-5-11 09:19 编辑 ]

davidjackyUID: 135962

thanks for sharing, no idea though.

hexiang129UID: 2193160

Never mind. This is the best method i know so far for this purpose. It deals with all formats, consumes no additional disk space, and takes <20min to re-encode an 1hr long episode.
I guess this bash script  is most convenient for linux users. For other uses, I still have to say sorry. I tried it under windows, but with no luck.