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AC3 and mp3 sync?
After several weeks of trying to get my camera tracks to synchronize properly with a pre-recorded mp3 I have finally determined that the mp3 is about 3 or 4 tenths of a second longer than the camera tracks.
If I make a copy of my mp3 at 48khz and import it into the project I can align it to the 44.1khz mp3 and they play at the same speed and pitch, synced together so that tells me it’s probably not the mismatched sample rates between my camera and the mp3.. It is only when I try to sync a 44.1 mp3 to the 48khz AC3 that I have problems.
I tried converting the mp3 to AC3 but Vegas will not let me import any AC3 audio. Someone said I needed DVD Architect so I download the demo but I still can’t import AC3 only render it.
Maybe my camera it recording slightly slow?
3 or 4 tenths of a second over three and a half minutes is not noticeable when played back by itself but it makes it impossible to sync my song from beginning to end with the master audio file.
Can Vegas sync AC3 files with mp3 or WAV files in the same project or do they not play nice together?
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3 Replies
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[William Van] “…I still can’t import AC3 only render it.”
Correct.
AC-3 files are not a supported audio import format for Vegas.“Maybe my camera it recording slightly slow?”
It shouldn’t be but that’s a possibility.
Use the Ctrl-Stretch technique mentioned in another thread to get it to the exact time. -
[Mike Kujbida] “Correct.
AC-3 files are not a supported audio import format for Vegas.”Why? AC-3 is pretty much the standard for AVCHD I believe so I don’t understand why Vegas wouldn’t support it.
When I import the video files it loads the audio from the camera as AC-3. I tried rendering just the AC-3 audio part to an mp3 and importing it back into Vegas but it was even longer than the original mp3 and the AC-3 file. But if I render the video to Mp4 it stays the same length as the .MTS file.
I work with audio (WAV and mp3 files) all day long in Sonar and have never had a problem with audio files of the same song source being different lengths.
Maybe I need to get Plural Eyes?
https://www.singularsoftware.com/pluraleyes.htmlDoes this work?
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AC3 can be imported… but it must be done muxed with a video in the form of a MPG or M2TS. You can not import a raw AC3 file (licensing issues)
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