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11.How to substitute audio in an MPEG file?

 

I have some existing MPEG video files from a client that I need to edit, and I'm wondering if your tools will do what I need.   What I need to do is to remove existing narration from the video clips, add new narration, and save the file back out without recompressing the video portion at all.   The video is encoded with MPEG-1, 496x288, 24fps.   The audio is 16 bit stereo, 44.100 kHz, MPEG-1 Layer 2, 192 kbits/s.   The new audio could be sent into your software in whatever format it would need, but I'd want the recompressed audio to be similar to what's listed above.
 

Yes, this can be done using the steps below.
1. Put the MPEG file on the video track of the Timeline.
2. Put the substitute audio on one of the audio tracks.
3. Mute the video clip from the clip menu.
4. Press Export button (red) on the Timeline's toolbox.
5. Select "Custom" template.
6. Switch to Audio page on the Export window.
7. Change the audio encoder to MPEG-1 Layer 2 at 44.1kHz and 192 kpbs.
8. Switch to Monitor page.
9. Press Start to complete the conversion.
If your substitute audio needs realignment with the video, you will need to do some manual adjustment, using a higher resolution time scale.

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