[MEncoder-users] [Script] PSNR between two video files

[Rich Felker]

On Thu, Aug 25, 2005 at 02:12:11PM +0200, Guillaume POIRIER wrote:
> At first, I didn't quite understand how you were able to compute the
> psnr of 2 pictures with only a shell script. Doing such thing in bash
> would probably give you the "master of shell script" crown! :)

It can be done, but very difficult.. Requires lots of black magic with
sed and tr, or you can make it somewhat easier if you allow yourself
to use uuencode, perhaps.

> A quick glance at the code shows that you use the tool "pnmpsnr" to do
> the frame-by-frame... so no crown for you today! ;o)

Also the huge temp space thing is very bad.. I bet that can be
overcome with some tricky use of fifos..

Rich