at what point do you use dvdshrink's deep analysis

[glockjs]

i pretty much use deep analysis for anything under 90%. just curious what everybody else does.

[dfisher]

I use it for all. Can't hurt. I usually just do the main movie & when everything is ready to shrink I set it to shut off the computer when it's finished, start it at bedtime, wake up in the morning. The computer is off, the movie is ready to burn. So far I've had no problems & my burns have looked as good as the original. I rip with Decrypter, shrink with Shrink & burn with CopytoDVD. May be a little more time consuming, but what the heck, it works.

[louv68]

Anything under 100% 'cause I want the best quality possible.

[freestyler]

I use it for everything. Always takes me less than 15 mins even for the biggest titles.

[BSR]

Anything under 100%. I guess I'm never really in that much of a hurry.

[archaeo]

Why not use it for anything under a 1:1 copy? The time is well spent to get the closest quality to the original. Better to use all the tools at your disposal then to skip and regret it later..

[glockjs]

freestyler

Always takes me less than 15 mins even for the biggest titles.

must be nice to have a p4 3.0....grrrrr, hahaha. why dont i use it every single time, uhh did you check out my puter stats? yeah 1.1 celeron, ouch..thats all i gotta say haha[/b]

[jarvis1781]

I don't use it for anything. I read over at doom9 that the deep analysis is only used to make sure the output size is completely maxed out. I find there is no difference in a deep analysis and regular output so I don't use it

[ddlooping]

Hi all.

jarvis1781, maybe this post by dvdshrink will change your mind.

http://forum.digital-digest.com/showthread.php?s=&postid=118540#post118540

After having done comparative tests, quite a few DVD Shrink users have also reported an improvement in quality when Deep Analysis was used.

[jimmalenko]

85% for mine.

[energy80s]

I would use "Deep Analysis" for anything other than a straight encode. If the disc is less than 4.37Gb when the other streams are removed I don't analyse, but just copy directly. Otherwise always go deep! It takes about 50 mins for a full disc on an XP1600 machine, but you only have to do it the once, so I think its worth the wait.

[DVD-BLUES]

I never tried it,does it make a noticable difference?

[Gazorgan]

I did a side by side comparison on my favorite Kung-Fu movie that was about 7 GB. It most definately does make a difference, especially in the action scenes.

I kind of think of it like this:

No Analysis = CBR
Deep Analysis = VBR

That's not 100% accurate, but I think it's a valid analogy.

[ddlooping]

DVD-BLUES, how noticeable the improvement is depends on a few things:

- Amount of compression applied.
- Viewing equipment.
- Quality/bitrate of the original title(s).

I can only suggest you use it for everything that requires more than 10% compresion ("Ratio" < 90%).
Switch DVD Shrink to "Low-priority" so you can easily multi-task while the analysis is being done in the background.

[Capmaster]

Never had any issues with the quality using the quick analysis ...if it ain't broke, don't fix it.

[ddlooping]

Capmaster, what is the average compression ratio you use and what is your viewing equipment?

[Capmaster]

Capmaster, what is the average compression ratio you use and what is your viewing equipment?

Usually about 80% so I usually don't have an issue with deep compression. Maybe I've lucked out so far. The viewing equipment is a couple of Sony standalone DVD players. One is a combo DVD/VHS and the other an NS-315.

[DVD-BLUES]

I will have to give it a try.I bought the ultra version of Nero,so I will try using Recode 2.I did notice that when viewing a burned copy of Texas Chainsaw Massacre 2003 that towards the end of the movie where Leatherface hit the top of the car with the chainsaw-the movie seemed like it froze for a brief second.I played that scene over several times and it seemed alright.Maybe deep anaylsis would solve this problem.My Panasonic player seemed to have trouble reading this movie at the start as well?
DVD Decrypter+DVD Shrink or Recode 2+Nero Ultra 6+TDK or Ritek or Maxell DVD-R=SUCCESS

[thxkid]

well using progressive scan and a 56in monitor anything uner 65% I can start seeing blocks and artifacts and grain so once it hits the the 65% or less I use it and I won't do any DVD under 50% even with deep anaylsis.

[jarvis1781]

Hi all.

jarvis1781, maybe this post by dvdshrink will change your mind.

http://forum.digital-digest.com/showthread.php?s=&postid=118540#post118540

After having done comparative tests, quite a few DVD Shrink users have also reported an improvement in quality when Deep Analysis was used.

that post just talks about what I said about the effect of meeting the target output size and I quote: "The points are calculated such that the sum of all X's for each GOP in the movie equal the target video size." The quick analysis accurately predicts the file size to within a few MB's of a deep analysis. I can't tell the difference of a few MB's so I don't use it. The link you showed me doesn't help to change my mind one bit. Thanks though.

[handyguy]

I tried it a few times but it didn't look any better than if I didn't use it. Might be my TV resolution. But then this isn't a poll about at what tv resolution you need to use it.

[mob]

i always use it when compression is needed. It only takes about 15 min on my pc so its good for me.

[ddlooping]

jarvis1781, the way I see it, Deep Analysis checks all the GOPs.
It is then able to apply compression to each GOP depending on their original size.
If doing only a quick analysis, DVD Shrink might end-up compressing some GOPs more than they should have been, hence a more pronounced decrease in quality.

I might be wrong though.