Audio problem on export

B

butler360

Well-known member
What I'm doing is this: exporting an AVI with audio and video in order to compress with Riva FLV encoder.

I have the Dynamics (compressor and limiter activated) effect on the audio. Usually when I play the sequence back in Premiere, it sounds fine. When I export it, though, it sounds like the Dynamics plugin takes a few seconds to kick in on the audio. So if the person is talking it sounds like they went from talking to you to yelling at you quite abruptly. This is always at the beginning of a clip. After it kicks in it sounds fine.

I should also mention that I have a few other effects on the clips. First, I normalized the audio. Then I have DeNoiser and EQ and lastly Dynamics. I assume this is the right order and I put Dynamics last to control clipping and boost the cleaned up audio. All of this is because it is really low, noisy audio intended for the web, so my goal is to have the audio loud enough to hear on, say, a cheap laptop.

I checked the obvious like accidentally keyframing the volume, etc. but there are no keyframes. I also tried decreasing the attack time on the compressor (just as a guess) and I saw no difference.

Thanks in advance for any help!
 
Duplicate your sequence, and then in the second copy, select each audio clip and go to Clip > Audio Options >Render and Replace. This will create new mixed-down effected versions of your audio clips. When you're done with that, try exporting that sequence.

As an aside, what version of Premiere are you using?
 
Well that worked perfectly! Thanks.

So why can't it do the exact same thing without the extra work? It shouldn't be a matter of CPU power, right?, because I'm on a quad-core system with 150GB Raptor, 2GB PC2800, 8800GT, etc.

The version is CS3. I didn't have this problem in 1.5... :huh:
 
Can't explain why it does or doesn't work... sorry :) It could be a corrupted conformed audio clip or something.

The reason I ask the version is because PPro CS3 has got Flash video encoding built into it through the Adobe Media Encoder. You can use the On2 VP6 codec which will give better results than the old Sorenson Spark-esque freeware codec than Riva uses. It doesn't do 2-pass VBR, like Sorenson Squeeze or Flix Pro, but the resulting video will look better at any given data rate. Check it out...
 
Thanks for your help and thanks for the flash tip!

Now, in another sequence, the volume is fine, but I'm having the exact same issue as before but with the noise reduction. As soon as it changes to the next subject talking, the noise is really apparent and then in 2-3 seconds it's gone...
 
With PPro closed, try going into the Media Cache folder inside your specific project folder and trashing all the CFA and PEK files you find there. The next time you launch PPro and open that project, the program will recreate all the conformed audio and peak files. It might take a few minutes, so grab a cup of joe and give it time to cook. Sometimes, these files can get corrupted (why? I can't tell you) and rebuilding new ones can solve odd audio anomalies.
 
I'll try that, and thanks for the suggestion, but it just seems too consistent to be corrupted files. It seems like when I render instead of it looking ahead while it writes the file it does it live like when you preview it. It's wierd. But it might work so I'll give it a shot. Thanks.
 
Cool, glad it worked. The way Premiere works with audio, if I understand it correctly, is that audio that doesn't match the sample rate and bit depth of the project preset gets "conformed". In other words, new raw PCM files with a .CFA extension get made, and Premiere actually uses those for playback and export. So, if a CFA file gets tweaked or corrupted, the audio will be messed up. I could be all wrong about that, but as long as it works, who cares!
 
Sorry to dig up an old thread, but I'm back to this problem. Nothing seems to work now. I found a few people having the same problem over on the Adobe forums: http://www.adobeforums.com/webx/.3c058827

...but no fix.

Is there anything else I can try? This just seems so odd and it is such a simple thing. It just sounds like the program gets caught by surprise, like "Oh yeah, we were supposed to have the compressor on in this clip! Better turn it on!" and by that time it's four seconds later with a very noticable change in volume.
 
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