ADS Technologies USBAV-708 INSTANT VIDEOMPX, User Manual

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Now consider the corresponding correctly interleaved file:
Here audio chunks are interleaved within the file so as they fall closely
alongside the related sequence of video. As playback progresses seeking
within the file is minimized, and in fact with appropriate buffering as
provided by most devices seeking will not even take place. This leads to
smoother playback performance. Because audio chunks are stored
alongside the corresponding video chunks if a viewer skips to a particular
point in the video the media player will likely locate the associated audio
and resume playback more promptly.
Using VirtualDub, you can access the Interleaving
options from the Audio menu.
Ensure “ Enable audio/video interleaving ” is enabled. The recommended
audio preload is the default 500 ms. The recommended audio interleave is
every 500 ms.
Note that 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.
AVI Container
Audio Video Audio Video Audio Video Audio Video Audio Video