[theora] creating a thumbnail series

[yorn at gmx.net]

Hi all,

I wrote a tiny script to create a series of thumbnails from a theora file by using the OggVideoTools.

usage: 

$> ./mkThumb videofile.ogm 10 "-s 0x100"

Creates 10 thumbnails from videofile.ogm. The pictures are set to a height of 100 pixel.

- Yorn


---- snip: mkThumb --------

#!/bin/sh
length=`oggLength $1`
timestring="0"
div=$(($2*1000))
for((i=1; i<$2; i++)) do
  value=$(echo "scale=3; $i*$length/$div" | bc -q 2>/dev/null)
  timestring="$timestring,$value"
done
oggThumb $3 -t$timestring $1

---- snip --------