What exacgtly does deep analysis do on DVDshrink 3.0

[kwack]

The reason I ask is that I obtained the same result in terms of compression on a m,ovie with and without running this and was wondering what was the benefit.

Also I understand that you can look at separate chapter points and set the compression for each of these.


How would you go about this?


Cheers

Kwack

[turk690]

How much percentage in compression was used? If in DVDShrink compression is done at least 80% of the original it's hard to tell the difference. When compression ratios go to lower than 70%, depending on the material, fast scenes can now look blocky. What device did u use to view the created (backupped) DVD?? On a small TV (14" or less) or on the window of your DVD player program, it's not easy to make out blocky video borne out of low compression ratios (percentage, where DVDShrink is concerned). Play that DVD-R and view it on a bigger than 32" screen and blockiness becomes apparent, though. When you click on a title (not chapter point) the compression slider can be set. This is ideal for maintaining the original DVD structure, menus and bonus features included, but reserving the most space for the main movie. Motion menus, for example can be set to "still pictures", and the audio removed.

[tompika]

http://forum.digital-digest.com/showthread.php?s=26e912bba6237028e748f81b7373853c&threadid=26603

[Gazorgan]

I did a test.

1) No deep analysis on a 5 GB movie. Final quality was excellant. Some macroblocks here and there, because I was looking for them. Particualry in fast action scenes with water/smoke. In one case someones hair was macroblocks for maybe 6 frames.

2) Deep analysis for same movie. No noticable macroblocks. I looked for 1/2 hour on my computer. Same scenes as before had no macroblocks.

I think the 1/2 hour the analysis takes is looking for scene changes and average bitrates so it can do some VBR.

[zenith52]

There is alot more to deep analysis than that!

Take a look at the thread pointed out by Tompika earlier in your thread as it goes into detail about vector points and the like

Zen

[Jestak]

greetings,

I concur with Gazorban. I did the same test and I found out that the deep analysis output has a better quality. In fact, I do not bother at all when the movie % ratio is over 60% to cut scenes.

Thank you

[Gazorgan]

I almsot never keep unwanted subs/audio, or menus/extras. I'm hard-pressed to be under 90% on most backups. I routinely snip intros/credits so I hit 100%. Only very long movies come close.

My test movie was Mummy 2 (about all action as you can get). I do deep analysis on anything under 85% (all you have to do is check the box). I know a lot of people are looking at 50% or less trying to do a DVD9 to DVD5 with full menus and extras.