Tip & How-To about Cell Phones
First of all, to rip CSS-protected DVD to AVI format
is possible with DVD decrypter program, but is
confined to legal use of the DVD only. CSS-protection
measure has long been the practice for preventing commercial DVDs from
being copied to hard disk or cloned to reproduction. But we are allowed
to use DVD decrypter to clone our expensive store bought CSS-protected
DVD for DVD backup. As for DVD backup, it only makes
sense to rip DVD to a format with DVD-like quality, smaller size and
high portability. So this is why we are going to rip DVD to AVI format
for the best DVD backup effort.
Normally, we need a DVD decrypter and a DVD converter to
accomplish the task. But now we have an integrated program with
comprehensible interface. It is called Leawo DVD Ripper.
Leawo DVD Ripper is highly compatible with any CSS-protected DVD.
CSS-protected DVD will be recognized and automatically decrypted
without our interference. So let’s focus on how to rip DVD to AVI format
in high quality, that is, DVD-like quality, smaller
size and high portability.
Here is the Download
link to the software. Need more checkups, please visit the DVD Ripper’s page.
This is a very comprehensible DVD decrypter/ripper program. Feed the
CSS-protected DVD in the DVD-ROM drive and use the "Load DVD"
function on the program main interface. Then you will see the complete
titles and chapters rolled out on the list more or less like the
screenshot below.
Click open the "Profile" dropdown box, navigate to
"Common Video" to make a choice on AVI profiles.
We are going to use "Xvid Movie (*.avi)"
profile, for the DVD-like picture quality and excellent sound quality.
Based on MPEG-4 compression, it can guarantee the best ratio of quality
to file size. As Xvid is an open-source codec, Xvid encoded AVI video
is highly portable to be played on other PC easily.
Then click "Settings" to open codec control. You
will see a list of codec parameters: Video Codec, Quality, Bit Rate,
Video Size, Frame Rate, Aspect Ratio, etc.
There are quite a number of parameters set to "auto".
It means to program will conduct the Xvid encoding with optimal
settings. For beginners, this is a very handy design. But for veterans,
it might not be enough to meet your picky demands. So let’s explore the
optimal settings for ourselves and gain a better understanding of how
the DVD to Xvid AVI conversion works. I am going to manifest the
difference among the settings of Bit Rate, the key factor which
influences the video quality and file size, by a field-test experiment.
Feel compelled to follow me?
In this experiment, I will rip a 9 second segment of DVD to Xvid AVI
in different Bit Rate settings. It is a repetitive action and I think
it makes more sense to jump to the conclusion now.
It is all right if this conclusive data table confuses you. It got
me, too, in some senses. LOL. What is behind these data is an equation:
File Size = (Video Bit Rate + Audio Bit Rate) * duration /8.
If you are perceptive, you would notice this is not an accurate
equation and there is small discrepancy between the custom video Bit
Rate and the actual video Bit Rate. It is because the Video Bit Rate is
vibrant but constant. The actual Video Bit Rate reflects the average of
Video Bit Rate. The longer duration of the video is converted, the
more approximate the actual Video Bit Rate is to the custom Video Bit
Rate.
Take a 2 hour DVD movie for example, you can be assured to count on
the custom Video Bit Rate, say 600, with 128kbps Audio Bit Rate to come
up with a 650MB AVI video. ((600+128)*7200/8=655200) By doing
this, you have reduced the 4GB DVD movie to 1/6 in size!
Of course, DVD backup won’t be a valuable one if it doesn’t have
DVD-like picture quality. Take a look at the comparison of the
screenshots from 600Kbps Video Bit Rate setting, Low Profile, Medium
Profile and High Profile.
Click the links to view the screenshots in full size
720*406.
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