Adobe Premiere Pro

FAQ:Why is there no audio in my imported MPEG file?

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  • In CS4 and later, demux the MPEG file and import the separate video and audio files into Premiere Pro.
  • If your MPEG file contains AC3 (Dolby Digital) audio then Mitch411 said:
If you've got Encore CS3 installed , copy the file ad2ac3dec.dll from the Encore CS3 directory and paste it into the PPro CS3 root directory. Once you restart CS3, you'll be able to import the file with the audio. This means if you've already have a project with the files imported, you'll need to remove the files from the project and then re-import them, or just start over with a new project.

Eddie, you're right. PPro doesn't import files with an AC3 extension, but it did import ac3 audio embedded in mpeg files from DVD camcorders. The ad2mcac3dec.dll that was included in 2.0 allowed those ac3 files to import as stereo (but not 5.1). It looks like that functionality was removed or broken in Premiere Pro CS3, but the functionality still exists in Encore CS3. You can copy the file over from Enc to PPro and get the functionality back. You may end up breaking something else, but it does work to allow the AC3 audio stream in the mpeg file to import.

Now aren't you glad that they decided to bundle Encore with Premiere Pro?
I've found several instances where Premiere did not favor my mpeg format and I got no sound though I thought it should be OK. I ended up running those files through MpegStreamclip (free download), outputing a ts file, renaming the file to .m2t, importing into Premiere, and everything worked fine. I've also found this great for fixing those little timecode problems that Premiere can't deal with.
Try using DGIndex to demux your MPEG audio and video. You can also simultaneously convert the audio to .WAV.

It is primarily used in conjunction with AviSynth, but you can also use it as a standalone demuxer.

Michel Munier Said!(can't get it in blue?) Hope I'm doing the right thing here... I wanted to convert .mts files into Avi to edit in PP2 and found a free pgr on line called "Format Factory" As I am an eternal beginner I did not see/check the setting and ended up with avi in pp2 that had no sound. It's after much mucking around and by accident a saw in the conversion settings that AVISynth was turned off by default. I did turned it on and had my AVI files in pp2 with sound. Just like in this page, I did not really know what I was doing or what avisynth meant. But it seemed to address the problem and may be help someone else. again appologies if it the wrong way to let you know about it. Michel Munier

Mike Cushman said

I've been working arouind by importing my source mpg files into premiere pro 2 which recognises the sound OK and exporting as AVI. When I import the avi into cs4 the sound is there. It it only some, and apparently random, files which have no sound.

I can live like this but it wastes time and energy and I would love to know how to fix it, not just live with it.

Kirk said:

Just find the file in its folder. Right click and rename to ".avi" instead of .mpg....

I just spent 2 hours downloading software (that once converted had a 'watermark' within the audio), looking at forums, etc. and after getting over it, renamed it to avi as the final straw...and it WORKED!!

Good luck to you all!

Richard Grace said:

Had a similar problem with Encore CS4 - solved by deleting all timelines in encore and reloading - it loses the sound if you add on to an existing timeline. It is easy to delete the timeline and restart a new one each time and this overcomes the problem for me.

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