Instruction Manual

1253
AVI Encoder Options dialog
Dialog Reference
• WMVideo Encoder DMO
• WM9Video Encoder DMO
Audio Codec
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.
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.
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.
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.
Change AVI settings
Checking this box causes another dialog box to appear after you click the
Save button. This is the Properties dialog box that allows you finer control