DivX 10
44
DivX, LLC
User Guide
STEP 3
Without closing VirtualDub, reconfigure the encode by setting
Variable bitrate mode to “Multipass, nth pass.”
When you save a video in “Multipass, nth pass” mode, the
encoder will use the analysis log from the previous pass to
help it encode the video with a consistent quality but still
targeting the bitrate you have specified.
The encoder will record an analysis of this nth pass with respect
to the decisions it makes based on the previous analysis from the
log file. This lets you feed the analysis log from one nth pass into
successive nth passes and refines the encoding process toward
the optimal quality level.
STEP 4
Save the AVI file using the same file name that you used for the
1st pass. It is normal practice in Multipass encoding to overwrite
the output from the previous pass every time you save.
After completing your nth pass encoding, play the AVI file to
see the output.
STEP 5
Without changing any settings, try saving the AVI file oe more time,
again choosing to overwrite the previous file. The encoder will use
the log file updated in the last nth pass to create an even higher
quality video.
Although you might be tempted to continue running nth pass after
nth pass there is of course a limit on the quality attainable at any
given bitrate. Typically 98-99% of the optimal quality will be
realized after 2 passes (1st, nth).
