User guide

DivX 10

DivX, LLC User Guide

Ensure that the “Enable audio/video interleaving” option is enabled.

The recommended audio preload is the default 500 ms.

The recommended audio interleave is every 1 frames.

TIP: the interleave options also present a method of adjusting audio/video

sync by adjusting the “Audio skew correction” value, either positively

or negatively in milliseconds. For example: if the audio was running two

seconds behind the video a value of -2000 ms would correct for the delay.

Conversely, if the audio was running one and a half seconds ahead of the

video a value of 1500 ms would be required.

3 - VirtualDub contains two audio processing modes, Direct Stream Copy

and Full Processing Mode.

In Direct Stream Copy mode, no processing (other than interleaving)

is performed on the audio stream. If you wanted to manipulate only the

AVI file’s video stream, configure the audio mode as Direct Stream Copy

in conjunction with Source Audio under the AUDIO menu. When you

save the new AVI file, the original audio stream is copied from the source.

In Full Processing Mode the given audio stream is decompressed and

fully processed when saving, including the application of any filters or

compressors you have selected.

Both Direct Stream Copy and Full Processing Mode have exactly the

same meaning when applied to the video stream, as opposed to the

audio stream.

TIP: using the “Audio Skew Correction” (see note 2 above) in combination

with Direct Stream Copy mode for both audio and video streams allows

you to correct the audio/video sync of any pre-existing AVI file without

requiring recompression of either stream.

4 - You can save a lot fo time when performing Multipass encoding if

you enable audio processing only during the last pass you intend to

save. It is wasteful to process audio on every pass because the AVI file,

including any audio track, is overwritten each time.