Avarage number of unique colors analysing program

[hopstiii]

Do you kow prgram that can analyse video quality by counting number of unique colors in video source?
With some interval frames will be measured and average calculated.

It would help me to determine optimal bitrate for DVD BU.

Or is ther other techniques?

Thanks for any help :thanks:
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Edit
I found out changing bitrate wont change unique colors number.
120 sequential frames:
vob @ 5213Kbps 186138 unique colors
X264 @ 2000Kbps 169788 unique colors
XviD @ 2000Kbps 179657 unique colors
X264 @ 1500Kbps 169817 unique colors
X264 @ 1000Kbps 169784 unique colors

[Shinigami-Sama]

120 frames is quite a small sample space...

[hopstiii]

120 frames is quite a small sample space...

Yes it's only some seconds. I will try more 300+, but its limited with my pc memory amount 8Gb and 32bit irfanview because i create contact sheet of all the frames in orig 720x576 PAL res, then i press i to read the unique colors info.

One more test with only 29 frames. (doesn't show useful info) :p
Total nr of unique colors per 29 frames with 400 frame intervall:
RAW vob @ 5213Kbps 180934
X264 @ 2000Kbps 166196
X264 @ 1500Kbps 166481
X264 @ 1000Kbps 166682

[hopstiii]

With 900 frames:
vob @ 5213Kbps 458047 colors, 100%
X264 @ 2000Kbps 446249 colors, 97,424%
X264 @ 1500Kbps 446885 colors, 97,563%
X264 @ 1000Kbps 448032 colors, 97,813%

I guess i can't measure bitrate quality with nr. of colors. :p
Isn't it possible to tell "x" bitrate x264 is 100% of DVD vob quality?

[Keiyakusha]

100% of DVD quality = x264 in lossless mode :)