1. Codec Unavailable Powerpoint Mac
2. Codec Unavailable Powerpoint Audio

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So, in summary.the audio is there, but PowerPoint 2010 will not recognize the audio codec on the PowerPoint 2010 machine. We tried to run the 'Optimize Media Compatibility' form within PowerPoint 2016, but it will not allow us to do that. Apparently, PowerPoint 2016 thinks there aren't any compatibility issues.

How marvellous that the recent versions of Office automatically embed videos into PowerPoint instead of linking them. And how frustrating when you bundle up your nicely self-contained multimedia presentation and someone else reports that the videos don’t play on their PC. ‘Codec unavailable’ tells you what doesn’t work, but it doesn’t tell you what does. This is an issue we’ve come across many times over the years, and it can be very tricky and time-consuming to troubleshoot, so we’ve developed a little tool that can be used to identify the most appropriate video format to use when embedding videos in a presentation that’s going to be used by someone else.

At the heart of all the trouble is a little thing called a ‘codec’ (or coder-decoder, or compressor-decompressor). Essentially, codecs encode and translate your media to make it suitable for storage and playback – and there is an assortment of different ones. Hair-pulling/beard-scratching occurs when the codecs used to create or convert a movie file on one PC are not installed on the target PC. When PowerPoint comes across a media file in a presentation, it uses Windows Media Player to attempt to play it, and if the codecs don’t match up, it can’t decode the data and the clip won’t play. To compound the villainy, media is now encoded in many different containers (e.g. avi, wmv, mp4, mov), each of which can make use of different codecs. This becomes a big issue because the folks who make or convert media files are likely to have a huge range of available codecs on their machine, whereas the folks who need to play the media may have ‘factory-standard’ codec installations with far less flexibility.

This all came into sharp focus on a recent project in which we had embedded a dozen video clips into a presentation only to find that the user could not play a single one of them. So, I developed a test file to see what ‘flavour’ of movie they would be able to see. Instead of going back and forth converting the videos over and over again and sending them off for the client to test, I made a PowerPoint show that includes short video clips in various container/codec combinations.

Download video embedding tool now from our Resources page.

Simply email the ppsx file and ask the recipient to open it and follow the instructions. All being well there will be at least one or two clips that play correctly, and those clips will tell the viewer which container and codec combination worked for them. Armed with this intel, you simply need to get hold of a freeware video converter and apply the correct settings to convert the video into the right format. Then insert it into the PowerPoint, and everything should run like a cinematic dream.

A terrific free video converter is HandBrake. It’s great for compressing video and reducing file size, as well as converting the format of a video not playing in PowerPoint. You can drag pretty much any video into HandBrake, and the default output for the Fast 1080p30 preset setting is MP4, which is the most versatile and widely accepted video format. It uses the H.264 video codec, so it means it will most likely play fine on any device.

If you don’t have the ability to install programs like HandBrake, then there are online options too like CloudConvert, which will convert your video to pretty much your format of choice, but I’d recommend MP4 for stability and consistency.

For some PowerPoint presentations created on older versions of PowerPoint, Mac users may receive a message of 'Codec unavailable' or simply that files don't play when trying to play embedded audio and video, preventing them from listening or watching the clips.

Work around the compatibility issue with these steps:

1. Download and install the free VLC media player
2. Open the PowerPoint file VLC using the Open menu, which should display a list of all of the media files embedded in it, possibly but not definitely in order
3. Open the PowerPoint file in PowerPoint, going through the slides
4. View the presentation in PowerPoint and play each media file in VLC when needed (this may take some guess-and-check work)

The author of the file should recreate the media clips using a recent version of PowerPoint, which will use more modern and broadly supported file formats.

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.

Codec Unavailable Powerpoint Mac

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

Codec Unavailable Powerpoint Audio

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