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
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
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. VideoReDo automatically
processes files so that when these
tags are removed the resulting audio
and video streams stay in sync. No
matter what the original source.
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 programs.
Autocropping of letterbox material
will remove the blank areas above
and below the program material and
create a true 16x9 (anamorphic)
DVD or video.