User guide

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Capturing material for your production
A note about capturing video with audio
Because of the way Video for Windows captures material, when you capture
video and audio to the same .avi file, the duration of the video and audio portions
of the clip may not be exactly the same. For example, the clip’s audio may end a
few frames before its associated video. To play back the clip, Video for Windows
adjusts the frame rate of the video so that it’s synchronized to start and stop at the
same time as the audio. This means the video may not play back smoothly, and
the clip’s frame rate won’t match the standard frame rate for your system (29.97
fps for NTSC video, or 25 fps for PAL video). The problem is most apparent with
very short clips.
If you use Adobe Premiere to capture your material, the duration of the video and
audio portions of your clips will match.