when using powerpoint slides, media codec is unavailable or not compatible. Can you please hep me to resolve this issue.

Hello,

The cause of this issue is that older versions of PowerPoint encoded audio and video using the Windows Media codec (making .WMA and .WMV files), which is no longer supported on Macs.

VLC player can play these files, but not the PowerPoint slides themselves.

Recent versions of PowerPoint use the broadly supported MPEG format (making .M4A and .MPG files).

PowerPoint - Codec Unavailable error for media on Macs - askIT - University at Albany