Compressibility check. Values checked

[Redin]

Please, Informe if values 60% of Bits/(Pixels*Frame) is stil correct for new divx5.1 / divx5.1.1beta.

If not, please make some corrections of divx5 tutorial in doom9 website tutorials.

Can i use the same values for XviD? What diference in comp.check to both codecs?

Thanks

[r6d2]

Originally posted by Redin
[B]Please, Informe if values 60% of Bits/(Pixels*Frame) is stil correct for new divx5.1 / divx5.1.1beta.
Yes, they should be the same since the changes are mainly related to speed.

Can i use the same values for XviD?
I honestly don't know, and I guess it cannot be told without testing it.

What is comparable between the two codecs is the quantization level. You can encode a sample with both to see which parameters yiels similar results. You can do the comparison two ways:

1. Using fddshow to see the quants (aproximate results, only visual).

2. Encode in 1-pass quality based mode and look at the obtained file sizes. Hence you get the bitrate. When you have the same bitrate as a result, you can know how input parameters relates in the different codecs.

You must do the tests caeteris paribus, i.e., same resolution, cropping, resizer and such. Parameters which don't exist in both codecs will affect the test results, so you should disable or neutralize them (use a value with minimal impact).

Remember that quality is always a subjective matter. Quantization is a useful measure of the similarity to the source, which may be regarded as a good quality indicator (the lower the better).

[jonny]

Please, Informe if values 60% of Bits/(Pixels*Frame) is stil correct for new divx5.1 / divx5.1.1beta.
I don't like this! :)
Don't take what you find in guides as immutable rules, because those are only general guidelines.
Personally i never get fully satisfied if i don't reach 75-80%, and at least 640x..., and lanczosresize.
Resolution and filters plays a really important role on final quality (comp.test is important to see what impact your choices will have on the final encode, but, like r6d2 says, making tests is the only way to decide what you like more).

This could be interesting:
http://forum.doom9.org/showthread.php?s=&threadid=55454