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Audio weirdness
Hi Guys,
I’ve got a mad one here, can you enlighten us?
Here’s our workflow:
Using a little Panasonic HD camera, AVCHD files were transcoded on ingest to ProRes through log and transfer. Look and sound good.
The edit done in ProRes, Master exported in ProRes, all works fine.
From this master we made H.264 files for the internet, all work fine.
Put them in flash player as we always do, streams perfectly online.Perfect for us. The client on the other hand says they either have no sound or the sound drops out here and there.
We triple check everything, play it on Mac, PC safari, firefox, internet explorer, we can’t recreate the problem.If the problem is on the original clip in some bizarre way we just assume that it would be fixed when we transcode it to H.264. But no.
We think it must be a weird phase shift problem – we often pan centre the audio on clips if they are very unequal and this might be affecting some clips, maybe. We’ve gone back to the original timeline, exported the offending audio as aiff, or wav etc reinserted it then gone from there. It always sounds fine to us locally, but the client says this fixes it sometimes, sometimes not.
We have thoroughly established that their speakers are not faulty! and anyway it’s happening on several different computers in different buildings. To us all clips are fine, except one of many that we too now hear the problem, so it IS real, just very inconsistent.This is all on my bosses Mac Pro using FCP 7.0.2. – In Software Update here are several pro app updates waiting to be installed, – we generally never do this mid job, but perhaps there’s a fix in there?
Can anyone explain this, and/or what might be a workaround?
Cheers,
Nick -
2 Replies
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ask them what they are watching it on.
could be a slow system or outdated flash player.
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Have you checked the H264 files on a mono speaker? If there is a phase weirdness then it should be apparent when everything is summed to mono.
If that is not causing any grief then it might be a problem with the data rate of the files being too much for the clients machine.
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