Q: Audio on keynote exported quicktime videos cuts out at 50 seconds?

I have never had a problem exporting to Quicktime from Keynote.  I always use the custom settings in the Format drop down menu, and never the presets, using the pixel values to match the specific display type being used.

This is STRICTLY a work around!  Official fix will come from Apple as an update more than likely.

Duplicate item first (File > Duplicate). On newly duplicated project change file association type (File > get info). Under name and extension section take out .key). Close Get Info and save with removing .key.  Double click to open the file (now a compression).  Open uncompressed folder (same name as original file, now shows as a folder).  Now in the Data folder find a .mov file named "Recording" with randomly generated letters and numbers behind it.  Drag .mov file to desktop or any other directory. Open extracted .mov file with QuickTime to verify integrity. Save as audio file only.  Get Info on file again and place .key value at end of file/extension for project. Open project. Under Play menu option delete the recording.   Under Audio inspector drag the .mov of audio only to recording back in. Test play project to see if its accurate.  Export to QuickTime and see if issue is resolved.

If issue persists:

Export with corrupted audio as QuickTime.  Separate the audio from video track.  Delete audio.  Import the extracted .mov audio file.  Share > File. Enjoy.

just use Quicktime export with the custom settings menu

Make sure you save the file after following TarqTeles suggestion. That made a difference for me.

Thank you so much itm78 for sharing that information.  I have had the same problem and have been working around it my exporting to QuickTime then adding the soundtrack to the movie.  Now I have your fix, that works for me too, I don't need to take that second step.  Thanks a lot.  I hope Apple will fix it, otherwise why have the mute capability?

We encounter the same problem in the production of our e-learning videos. The thing "fun" is that we are already registered in "package" ... The audio files are actually cut down a fifty second, but it also happens that export quicktime plant completely . I first thought of a power problem, but after testing on other machines, this is not the case. And then I thought of a software problem, but on a blank mac Keynote any newly installed ... same problem.

Configuration: mid-2010 iMac i7 2,8Ghz, 16GB RAM, SSD.

Select Custom in the Format drop down menu, then export:

Thank you. Thank you ! For me the muting the mic while recording was the issue. Thanks ! You saved my day.

So if you mute the mic when recording, the audio isn't going to export to Quicknote. Weird. Workaround: before recording, go into system preferences and mute the mic that way. Then go in and record, leaving the mic on inside keynote. Tada! Just make sure you remember to turn your mic back on after.

I agree with above statement the solution "File > Advanced > Change File Type and change from "Single File" to "Package" doe not work with long video and additional animation on the slide. I was contacted with online help and no solution, most probably this will be fixed with new release or upgrade.

I agree with above statement the solution "File > Advanced > Change File Type and change from "Single File" to "Package" doe not work with long video and additional animation on the slide. I was contacted with online help and no solution, most probably this will be fixed with new release or upgrade.

Using El Capitan 10.11.3 and Keynote 6.6.1.  My audio VO WAV files played fine in Keynote slideshow, but some were cutting off towards the end when I exported to Quicktime.  Drove me crazy.  Tried all of the suggestions here but no fix.  So I brought the WAV file used in the slide that was cutting off, back into Adobe Audition and exported it to a 192kbps MP3 file - reinserted back into Keynote and voila, no cut-off when I export to Quicktime.  The original WAV file was recorded at 48Khz, so I'm thinking there's a compatibility issue with that type of WAV file - maybe how it was originally saved in Audition.  Someone could try other formats too, but frankly, the MP3 sounds fine as it's only a voice over.  And if I redo all VOs to MP3, it will reduce overall file size significantly. This could be key too as some have said various Keynote issues could be due to large file sizes.

Thank you! This fixed the problem for me. My Mp3 file was in 256 kps. I converted it to 128 kps and the problem works.

I also found that if you converted the files to Quicktime, embedding them as .MOV that also solved the problem.