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

It just started! When I export my keynote into a Quicktime file, the audio cuts out at 50 seconds. I have been creating videos a long time with this method and never had problems before.

MacBook Pro, OS X Yosemite (10.10), Keynote 6.5

Posted on Nov 14, 2014 10:29 AM

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43 replies

Dec 6, 2014 11:58 AM in response to LDNiagara

I found this discussion because I was having a similar problem. I created a "promotional video" in Keynote. I recorded a narration and music background track in Garageband, which I exported to an .mp3 file. I then selected my soundtrack (.mp3) in Keynote. To get the slides' transitions to sync with the soundtrack, I clicked the "Record" button in Keynote. I clicked the mic mute button right before I clicked the round red "record" button so it wouldn't record any background noise.

When I exported it to "Quicktime", I realized the video was missing the audio. After hours of agonizing over the problem, trying all sorts of things, I contacted Apple support (I still had a few days left of free Apple Care 🙂). The help agents were very friendly and helpful, and they helped me narrow down the issue. I am really excited to have the problem solved!

My problem was muting the mic when I recorded the timing. I guess by muting the mic, I was also muting the soundtrack too. If you want to record the timings without recording background noise (and the clicks of your keyboard buttons 🙂) go to your "System Preferences"-->"Sound"-->"Input" and turn your "Input Volume" (the mic icon) all the way down.

THE KEY IS THIS: DO NOT MUTE YOUR MIC INSIDE KEYNOTE IF YOU WANT AUDIO OUTPUT TO YOUR QUICKTIME VIDEO. This completely solved my problem. Hope it helps you!

If this doesn't help, I highly recommend calling up Apple Support. Click here for contact information. If you have not activated your complementary, free "Apple Care" (might be 30 days-90 days), now's a good time to do that and take advantage of the opportunity to get your problem solved. If you already activated it and it's expired, you can still call them up and talk to an actual person (🙂). They will listen to your problem, and tell you if you need to pay the $29 fee to continue forward towards a solution.

Dec 6, 2014 8:24 PM in response to itm78

This problem has NOT been fixed. Some of the proposed work arounds do not seem to work. This should be an obvious address, folks. Recorded sound STOPS are approx 50 seconds. "play recorded slideshow" in KN and it costs off, so not an export issue. Yosemite 10.10.1 KN 6.5


ITM78 - I did NOT click on the mute button on the recording. I DID try your suggestion to turn down the input, and I DO have a soundtrack. Audio still cots off at around 50 sec.

Dec 7, 2014 6:49 AM in response to LDNiagara

This problem has NOT been fixed. Some of the proposed work arounds do not seem to work.

This should be an obvious address, Apple folks. This issue raised some time ago.


Recorded sound STOPS at approx 50 seconds. "play recorded slideshow" in KN and it costs off, so it is not an export issue or a QT player issue.

Per itm78, I tried made sure not to click mute on the recording (I do use soundtrack). Also turned down input.


Audio cuts off around 50 sec - KN player (of recorded only, DOES play in runtime render) and export has cut.

Issue seems the recording process or the artifact/file/package that is created in the recording.


MacBook Air - Yosemite 10.10.1 KN 6.5

Dec 7, 2014 2:00 PM in response to LDNiagara

I have identically the same problem using KN 6.5 under OSX 10.10.1 using an iMac. I tried the suggestions on this thread, but the problem remains. The file I'm working on is about 8:30 in length, has only 16 slides with recorded voice over (that seemed to go well), but audio fails during playback inside KN at about 50 seconds +/- with the same thing happening when I export the file to Quicktime(i.e., no audio). The KN file size shows 16.2 MB, so it is likely that the audio is recorded. I just can't get at it either with KN or with an export.


Does anyone know the status of a fix and whether Apple is aggressively addressing a fix?

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

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