Learn more about video
Why is Native editing
important to you?
H.264 and MPEG are highly
compressed formats. Most full-
featured video editors convert
your videos into uncompressed
video for editing and then re-
encode it when saving the edits.
The result is that it can take hours
to save your video rather than
just minutes as it does with
More importantly, each recoding
results in a reduction of quality.
With VideoReDo's perfected smart
rendering technology you can edit
again and again without degrading
any of your precious videos.
Why do my videos get out of
sync when saving edited
There are many different reasons.
For example, if you are capturing
off the air, cable or satellite, a
transmission error can result in
dropped video frames.
Transferring from VHS tapes has
its own unique set of sync
problems as the timing of
consumer VHS players and old,
noisy tapes can quickly result in
out of sync DVDs.
When you capture your video,
your audio and video information
contains time code tags which
keep the playback in sync. When
a program is authored to DVD,
these time code tags are removed
by the authoring tool and potential
sync corrections are lost.
processes files so that when these
tags are removed the resulting
audio and video streams stay in
sync. No matter what the original
Why do I need frame
Because if you don't have frame
accurate editing, you will not be
able to specify the exact cut
points resulting in a very chopped
looking edit. You will either
remove wanted program material,
or leave in parts you did not want.
Frames in a compressed video are
not stored sequentially and most
frames are stored simply as
changes from some prior frame.
Without VideoReDo's special
capabilities, the only place you
can cut safely is on a GOP
boundary. A GOP boundary is
where the original encoder has
encoded a complete frame.
Depending upon your source
material, GOP boundaries occur
every 1/2 to 30 seconds.
Why do I need to Autocrop
For optimal playback, especially
on wide screen monitors and
devices, the video should be
stored in its native aspect ratio of
either 16x9 or 4x3. However,
programs captured from some
sources such as a video capture
card or DVD recorder will store
the video in 4x3 format. Programs
that should be displayed in a
widescreen format are
"letterboxed" with dark blank
areas above and below the
Autocropping of letterbox material
will remove the blank areas above
and below the program material
and create a true 16x9
(anamorphic) DVD or video.