How do i compare the quality of 2 dvd's copied by different software

vbimport

#1

i want to se the quality difference of the copy made with dvd cloner 2 and 1 click dvd copy. anyone know how i can check this and whats the difference between the programs. everywhere i read 1 click dvd copy is the better software and does alot more.

thanks


#2

Look Here:http://club.cdfreaks.com/showthread.php?t=127917 Although I didnt use DVD Cloner II, (as its not a fully functional trial) the differences between most transcoding software is negligable to the human eye. If you want to compare bitrate and quantization use this: http://www.tecoltd.com/bitratev.htm although I believe you need to payware version to view quantization readings. Use ‘Vobmerge’: http://www.digital-digest.com/dvd/downloads/showsoftware_vobmerge_108.html and author the transcoded vobs into one then run the single 4.38G vob through ‘Bitrate Viewer’.


#3

the best way to judge the quality would be to look at the finished products and compare.


#4

i see because i cannot see any difference when watching, just thought that one must be superior to the other


#5

It’s very difficult to see the drop in picture quality unless you’re compressing the source by more than 20%. With normal viewing, even 30% compression is unnoticeable to most viewers.


#6

Several posters here claim they can see difference between programs and/or transcoders, and also can tell difference of compression 90% and 80%, etc.
There are users who spend 3-5 hours for several passes of analysis and transcoding. (and as a joke, they later try to burn fast to save 12 seconds…)

For standard movies without super fast action, I compress up to 65% without hesitation. For example, I compressed Harry Potter I to 65%, but this is a 152 minutes long, wide screen format. Once the movie starts I do not see blurrs or blots, or bits, or blahs. Also, I am not pro-actively looking for these imperfections, I just watch the movie itself.
I do not want to spend hours on the analysis and transcoding, and then even more time trying to look at the picture to find imperfections, if any. I am trying to watch the movie, not watch the imperfections, so what now? watch the movie again after it was accepted as “perfect”? :slight_smile:
My backups are for personal use and time shifting, not for commercial distribution or showing.
I do not have 6 foot TV set, so maybe size matters :slight_smile:

Anyway, when prices of DL media drop below, say, 80 cents, we will not compress so much, and transcoding will be forgotten …


#7

thanks alot


#8

percentage alone is not a good way to determine how much to compress a movie. read here to see why. as for whether or not methods that require more time (such as dvd rebuilder) produce a noticeable difference in video quality, i have a comparison here (winrar is needed to decompress).


#9

Very very interesting AZImmortal:) My comparisons soon to be posted make sense now.


#10

sounds good i thought there may be a simple way to see a graph comparison of two different dvd’s that where burned

??