#!/bin/sh

    if [ -z "$1" ]; then
      echo "Usage: $0 {-divx|-xvid} list_of_flv_files"
      exit 1
    fi

    # video encoding bit rate
    V_BITRATE=1000

    while [ "$1" ]; do
      case "$1" in
        -divx)
          MENC_OPTS="-ovc lavc -lavcopts \
            vcodec=mpeg4:vbitrate=$V_BITRATE:mbd=2:v4mv:autoaspect"
          ;;
        -xvid)
          MENC_OPTS="-ovc xvid -xvidencopts bitrate=$V_BITRATE:autoaspect"
          ;;
        *)
          if file "$1" | grep -q "Macromedia Flash Video"; then
            mencoder "$1" $MENC_OPTS -vf pp=lb -oac mp3lame \
              -lameopts fast:preset=standard -o \
              "`basename $1 .flv`.avi"
          else
            echo "$1 is not Flash Video. Skipping"
          fi
          ;;
      esac
      shift
    done