Video quality measurement (PSNR etc. for h.264) Tool required

[ben darby]

* Luqman wrote:
> hi, 
> 
> I like to measure video quality between different versions of a video
> content. Is there any open source utility that gives me the required
> quality measurement results.
> 
> I am particularly interested in PSNR but also other approaches would be
> welcomed.

the official mplayer tarball includes a script to compute the PSNR between
two video files in the TOOLS subdir (psnr-video.sh) it basically just
extracts every frame to an image file and does the computations and comparisons
from there, so you need to install the netpbm package aswell. but as you can
imagine it uses ALOT of disk space depending on the number of frames + quality 

-- 
ben darby
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