modulated quant - 1st pass question

Erm. If you#d read further you'd seen that I acknowledged that, it's true. But it doesnt have real impact so it doesn't matter anyways. The curve treatment spreads the bits which are over- or underused in those cases, just as it does now. Regards, Koepi

EDIT: Repeat: But it doesnt have real impact so it doesn't matter anyways. The curve treatment spreads the bits which are over- or underused in those cases, just as it does now. Maybe now? EDIT: and no, it doesn't show visual differences in second pass, forget about that. EDIT2: :stupid:

Sure I can comment of it. I said it makes a noticable difference on the average quant, whether or not that difference is visible is up to you to judge. e.g. H.263 on 1st pass, Modulated on 2nd pass: Quant 2: 20214 Quant 3: 127221 Quant 4: 34141 Quant 5: 3162 Quant 6: 1210 Quant 7: 112 Quant 8: 113 Quant 9: 13 Quant 10: 2 MPEG on 1st pass, Modulated on 2nd pass: Quant 2: 30525 Quant 3: 126034 Quant 4: 27479 Quant 5: 2019 Quant 6: 123 Quant 7: 7 Quant 8: 1 Averages: H.263 -> 3.13 MPEG -> 3.01 All other settings exactly identical except the H.263/MPEG quantizer matrix. I call that a sizable difference on the average. So either the curve treatment didn't do its work properly, or the ME or whatever else was more efficient in the MPEG-case. Ps. This is reproducable on all other movies I've done in case you're wondering (although I haven't used the newest builds with the new CC code yet).

No offense, but I'm only encouraging people to test things for themselves, instead of blindly following what others say.

Well that's some interesting numbers above and I would have never guessed that would be the case. Admitingly I never tried MPEG on the first pass except if I were doing a high bitrate 2CD rip. Time for some testing now:)

Well, then why care at all? Damn, take some different footage. Make more tests. Don't take a single (lemme guess, highly cleaned anime?) file as general case! Don't do that error. Regards, Koepi

Well, I'm not all that wanker that you may think :P I'm testing your thesis (...again, we already tested with some small clips and the results weren't indicating anything but MPEG quant doesn't handle noisy sources well...) ATM and the first result is: [EDITED OUT] I prepare some numbers right now, but I'm waiting for the first (and then the 2nd pass) of the h263/modulated version to finish up, can take some hours. It is in fact very important to know which movie, which DVD, which kind of movie (anime/real life/action / clean /noisy..) you tested that way. Well, when the test is finished I'll post a draft here (or in a new thread?) where this is all respected and I want to encourage you to do some further (public!) testing. Regards, Koepi

Erm with public testing I mean that you test the way I propose you do (stating which source, kind of movie, quality of source,... even the avisynth script is important). Regards, Koepi

Thanks for the reply :) Well, my first pass needs another hour, and the second pass will need about 2 1/2 - 3 hours again, I already prepared the post and only have to fill in the results. I'm looking forward to that! :) Regards, Koepi