video quality studio

[twist3d]

from everwicked.com (slightly edited):

"Video Quality Studio is a framework that supports the objective evaluation of video quality using appropriate metrics."
"In short, it allows you to 'compare' the quality of two video files."

although old news in everwicked.com forums and hydrogenaudio forums, I noticed that doom9 had no news or link to the program:
http://www.everwicked.com/vqstudio/.

If it works as intended (I'm now encoding two clips, xvid and divx to test), it could give interesting results in codec comparisons etc.

The application is distributed for free and the webpage also contains instructions on how to use it.

[Lefungus]

This app does work as advertised :)
Now it can use two video quality metrics, PSNR and VQM from Feng Xiao.
PSNR is boring, but VQM is much more interesting.
VQM stands for Video Quality Metric, it uses assumptions about the human visual system (hvs) to determine where artifacts are most easily seen.

Unlike my own (http://forum.doom9.org/showthread.php?s=&threadid=56081) implementation of VQM, this one is better because it differentiate between inter and intra frames. So some motion is taken into account.

Some may know another version of this VQM algorithm as it's used under the commercial app JNDmetrix-IQ.

Objective quality metrics have their limits, but imo, it's a nice tool to use with your own subjective tests when comparing videos.

[twist3d]

It could give some additional info in codec tests, but I don't think it could be used as final reference to judge codec's capabilities.
I hope that doom9 reads this and in some future codec comparison there
is VQM scores too.

[everwicked]

Version 0.3 (http://www.everwicked.com/vqstudio/) is out.

Features DirectShow support (i.e. can handle MP4 and MKV files directly, assuming you have the correct filters installed).

Important: Do NOT use the XviD DirectShow decoder to decode MPEG-4 video because it has a bug that will bogus results! Use ffdshow or 3ivx instead!