No sound on .mov files - why?

Question

No sound on .mov files - why?

I've just got a MacPro running 10.4.11. If I download a .mov file it appears to play perfectly but with no sound. I have Quicktime 7.5 installed. What can I do about this?
Thanks,
Alex

MacPro 2.66, Mac OS X (10.4.11)

Posted on Nov 4, 2008 3:01 AM

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Answer 1

Klaus1

Level 9

52,749 points

Nov 4, 2008 3:23 AM in response to Alexander Ramsay

.mov is a container that can include a wide variety of codecs. At a guess you need to download and install Perian from http://perian.org/

You should read this support page http://perian.org/#support in case you need to delete older codecs.

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Answer 2

Nov 4, 2008 3:32 AM in response to Klaus1

I've got Perian installed (it's the only item (perian.component)in users/library/quicktime) but it makes no difference

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Answer 3

Klaus1

Level 9

52,749 points

Nov 4, 2008 3:52 AM in response to Alexander Ramsay

Can you check in Movie Inspector in Quicktime Player what codec the video is?

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Answer 4

Nov 4, 2008 4:06 AM in response to Klaus1

I can't see anything that says codec, but under 'Format' it says AAC, Stereo(LR),44.100kHz H.264

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Answer 5

Klaus1

Level 9

52,749 points

Nov 4, 2008 4:20 AM in response to Alexander Ramsay

AAC is the audio format, which Perian can handle.

What else does it say?

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Answer 6

Nov 4, 2008 4:27 AM in response to Klaus1

It just gives Source, Format, FPS,Data Size, Data Rate etc. Nothing saying 'codec'

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Answer 7

Klaus1

Level 9

52,749 points

Nov 4, 2008 4:35 AM in response to Alexander Ramsay

Sorry, my bad - you already mentioned that it is H.264, about which more here:

http://www.apple.com/quicktime/technologies/h264/faq.html

As you can see these should play in Quicktime 7.5.5 which you presumably have?

As for the missing audio:

Your audio settings may have been changed.

1. Open Audio MIDI Setup (/Applications/Utilities/), then check the Audio Output setting.
2. Change the Audio Output setting to 44100.0 Hz.
3. Quit Audio MIDI Setup.

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Answer 8

Nov 4, 2008 4:41 AM in response to Klaus1

OK - Audio Input is already 44100.0, Audio Output says 'Output is not supported'. Default and System Outputs are both set to'Built-in Output'

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Answer 9

Klaus1

Level 9

52,749 points

Nov 4, 2008 4:54 AM in response to Alexander Ramsay

Does your Audio MIDI setup look like this?

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Answer 10

Nov 4, 2008 5:14 AM in response to Klaus1

No - Default Input is set to 'Built-in Line Input'
Properties for 'Built-in Line Input'
Audio Input source 'Line In'
format 44100.0Hz 2ch - 24bit
Channel M volume slider - n/a
Channel 1 volume slider - 0.35
Channel 2 volume slider - 0.35
Default and System Outputs - 'Built-in Output'
Audio Output - 'Output is not supported'

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Answer 11

Klaus1

Level 9

52,749 points

Nov 4, 2008 5:21 AM in response to Alexander Ramsay

Try changing them!

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Answer 12

Nov 4, 2008 5:29 AM in response to Klaus1

I haven't got the options shown on your screenshot - no 'built-in audio', for instance. My only alternative is 'built-in digital input'

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Answer 13

Klaus1

Level 9

52,749 points

Nov 4, 2008 5:42 AM in response to Alexander Ramsay

A MacPro does not produce sound?

Granted my settings are for an iMac running Tiger, but the principle should be the same.

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Answer 14

Nov 4, 2008 6:27 AM in response to Klaus1

I can't explain it - my Mac certainly produces sound, and things like YouTube videos play normally - it's these .mov files seem to be a problem. And I've no idea why there should be no 'output audio' in the Midi settings

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Answer 15

Nov 4, 2008 7:39 AM in response to Alexander Ramsay

I'm a bit puzzled by this - in users/library/quicktime I have the Perian component. In users/library/internet plugins I have nothing.

In Macintosh HD/library/quicktime I have only AppleIntermediateCodec.component and AppleMPEG2Codec.component

In Macintosh HD/library/internet plugins there are among other plugins two QuickTime ones - Quicktime plugin.plugin and Quicktime plugin.webplugin

Should I change/remove any of these?

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