Reference Guide

Dialog Reference

AVI Encoder Options dialog

• MSScreen encoder

• WMVideo Encoder DMO

• WM9Video Encoder DMO

Audio Codec

The following audio compression codecs have been found to be compatible (you may see different

codecs installed on your system):

• CCITT - A Law

• CCITT - U Law

• DSP Group TrueSpeech

• PCM (this is the standard uncompressed format for wav files)

• GSM 6.10

• IMA ADPCM

Keyframe Rate

This field is greyed-out if you choose the Default Codec in the Video field.

Data Rate

This field is greyed-out if you choose the Default Codec in the Video field. If you are compressing a

file to be played over the Internet, use a data rate that doesn’t exceed the capacity of the media

players you expect will be used to play your file.

Quality

Lower quality values provide faster transmission and vice versa.

Note: If you’re exporting an AVI file to either a 24-bit audio format or to a multi-channel

(surround sound) format, set the Audio Codec to No Compression.

Note: If you intend to do a lot of seeking around or looping and editing while a video file is

loaded, make sure that your video file has sufficient keyframes. Since each frame has to be

computed from the last keyframe encountered, if you have very few keyframes in the video,

performance may be slow. To change the number of keyframes, you may recompress the file

using File > Export > Video and specify more frequent keyframes. Choose a suitable video

compressor such as "Indeo Video 5.04" and change the KeyFrame Rate parameter to a number

between 1-5. A value of 1 makes every frame a keyframe, and higher numbers insert a keyframe

after that many frames.