Hi,
This is my first post, so please bear with me.
I used FabDecrypter and Nero to burn a DVD+R. When I copy this disk, should I go through the advanced analysis again? I am sure I should do the "Slow Recode". When Shrink is used, the advanced analysis is grayed out if you are using it to make a copy. If it will improve the quality, it is worth the time. I just did not know if it will make any difference.
I would appreciate any input you might have on this.
You're talking about deep analysis, I have wondered about that myself. I personally don't use it myself, it takes a lot of time. I just use good media and burn at 4x, it seems to work, no problems with picture or sound quality. I only have a 30" widescreen tv, but a nice stereo setup and the 5.1 sounds great and picture is still better than original.
I think the amount of compression determines whether to use deep analysis or not. For compression levels of 80 or above, I don't think you'll see much difference. Below that, deep analysis may make a difference and be worth the time. There comes a point however where no deep analysis will help when the compression is too great. Better opt for a DL copy in that case if you care about quality. IMO if you're only doing the main title for a 2 hour or so movie, you won't need any deep analysis. Once you get over 2 hours by any appreciable amount you'll likely need it or a DL copy.
I do only backup the Main Movie. Most of them are not more than just a few minutes over 2 hours. So, if I understand correctly, deep analysis is not really necessary, even on the original backup.
Also, I only back up VIDEO_TS files. The backups are very high quality. I use mostly DVD+Rs and I bitset them to DVD-ROM. I have seen posts that say you should only do this with an ISO. I know the ISO is an image, but they seem to play the same. Is there an advantage for one over the other?
They are the same in the end. To make the ISO image file, the authoring program simply takes the video files and simulates the writing to the disk, bit by bit. This is the image file. The burning program then copies the image file to the DVD. Some burning programs can also just take the video files as input and construct the image for writing the DVD all in the same step. The reason many generate an ISO file is because some preferred burning programs, ImgBurn and DVD Decrypter, only take image files as input. The end result is a DVD with the same file structure you had in the beginning. Booktyping can be accomplished with either approach. Also ISO files on the hard drive can be mounted with software as virtual DVDs and played as though they were on a disk in a DVD drive. There are only a few software players that will play a folder of video files.
To answer your original question you shouldn't run the movie through an encoder again...it's just overkill as the quality will not improve from the sources quality. The easiest way to copy a copy is to use DVD Decrypter in ISO read mode and then burn with DVDD or Imgburn in ISO write mode.
The reason that Advanced Analysis is greyed out it because it isn't needed as the compression ratio should be at 100% since the disc has already been compressed.
I have some Movies backed up on my HDD. Nero Showtime plays them. Speaking of Nero, I recently received an OEM version with a Benq 1655 that I purchased. Some posts on the Nero Forum suggested that it be updated with the error free version. I used the clean tool and did that so now I have 6.6.0.1.8 and it works great. My question is that every time I go into Recode 2, I get a popup about a Multichanel update that they want to sell me. In order to get rid of the popup, I had to tell Nero to always downmix to 2 channel stereo. When I backup a DVD, I always check Dolby Digital 5.1-ch English. On the burn do I get the 5.1? If not, any ideas how to get the popup to go away?
Thanks for Your help. I have done copies as you suggested. I also have a friend that opens Shrink, drags in the title and lets it go through the fast analysis and it goes right into a burn with Nero Burning Rom. That's pretty quick. Less than 15 minutes total at 8x. My main question was about going through the deep analysis another time and your answer makes a lot of sense. You are correct. The compression reads 100% when you copy. Obviously, no need to do any more.
