AVI Encoder Options dialog

Clicking the Encoding Options button in the Video dialog box opens the AVI Encoder Options dialog box. This dialog box lists the AVI video and audio codecs (compression-decompression programs) that are currently installed on your computer. The AVI Encoder Options dialog box has the following fields:

Video Codec

Choose a compression format, but note the following:

Not all compression codecs listed may necessarily be compatible while re-compressing video through “Export to AVI”. If an incompatible compression codec is selected an error message may be displayed during the export.

If No Compression is selected, the video retains its original compression.

The following video compression codecs have been found to be compatible. Different codecs provide varying degrees of compression performance.

MJPEG Compressor

DV Video Encoder

Indeo Video 5.04

Intel I.263

Cinepak Codec by Radius

Microsoft Video 1

Microsoft RLE

These codecs have been found not to work:

H.261

H.263

Intel 4:2:0 Video V2.50

MSScreen 9 encoder

MSScreen encoder

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 over the configuration of the AVI file you are creating. The available parameters are Microsoft Direct Show settings.