HT3775 I have an .avi file Quicktime is refusing to play, yet the information says Quicktime does play .avi files. Does anyone know what the problem is?

I have an .avi file Quicktime is refusing to play, yet the information says Quicktime does play .avi files. Does anyone know what the problem is?

AVI is a legacy file container originated by Microsoft back in 1992 and which has not been officially supported for more than a decade. Like the container, many of the codecs commonly used to create AVI content are also "legacy" compression formats most often supported on PC/Windows platforms. In fact, some codecs have never been transcoded for Mac use. Of those that have, many never made the transition to Mac OS X or the transition to Intel-based platforms. Those codecs that are still supported on the Mac can normally be found in the avi to quicktime converter available as an online download. While some common AVI compression formats may be supported by the QT X Player app, QT 7 currently provides a more compatible AVI playback environment for most "legacy" compression formats. If the codec(s) used in your AVI files are not supported by the avi to quicktime converter for QT use, you can try the VLC media player which may still support more esoteric compression formats. If  VLC does not support the files, the normal approach is to discover which specific audio and/or video codecs were used to create the file and perform an Internet search to see if a compatible Mac component is available for download.

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