No audio after using Compressor

Question

Level 1

4 points

No audio after using Compressor

Hello folks,
I have NTSC DV video, which I am trying to compress using Compressor. I am using DVD MPEG2 5.0 Mbps 2 pass compression with Dolby Digital audio at 192 Kbps. Everything seems to work fine, compressed video has much smaller size, quality is good... but there is no audio. Any idea what I do wrong?
Thank you for any advise.

Mac G4

Posted on May 26, 2008 8:19 PM

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Answer 1

May 27, 2008 5:07 AM in response to Madagascar

Hello.

When using Compressor to encode to DVD, 2 separate files are created, m2v (video) and ac3 (audio). They are not muxed together. You then import both of those files into DVD Studio Pro, and combine them on a video track there.

A really good website that will walk you through the workflows associated with Compressor and DVDSP is DVD StepByStep

What is your target delivery source? DVD, web?

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Answer 2

Madagascar Author

Level 1

4 points

May 27, 2008 10:32 AM in response to Michael Trauffer

Hi Michael,
thanks for your response and for the link.
That would make a sense... but the problem is, that I can't find any audio file in the destination after compression. There is only video file (m2v), but no ac3.
My target is DVD.
Thanks again for your patience.
Cheers

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Answer 3

May 27, 2008 11:22 AM in response to Madagascar

Check the History window in Compressor to verify that an AC3 encode was actually performed. If the history window shows that to be the case, then click the magnifying glass which should reveal its location in the Finder.

If that doesn't work, you could run a separate AC3 encode. The encoding process for AC3 is pretty fast.

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Answer 4

Madagascar Author

Level 1

4 points

May 27, 2008 1:45 PM in response to Michael Trauffer

Got it. Thank you so much.
Cheers

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Answer 5

Goteman

Level 1

0 points

May 31, 2008 6:25 AM in response to Michael Trauffer

Great! I have the same problem, but the problem is that my target is for a video file to be played off another (PC) computer, that is why I'm using compressor. Is it possible to merge the video and audio in the video file you are creating somehow?

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Answer 6

RedTruck

Level 4

2,145 points

May 31, 2008 6:46 AM in response to Goteman

if you want MPEG-2 then you need to make it a program or a transport stream. But you have to make sure the computer it will play on can handle playing an MPEG movie. Many cannot without a plug-in. An H.264 is way better than MPEG-2 at a smaller file size and a lower bit rate. If your player can play an H.264, use that. It will contain both audio and video multiplexed into one file.

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