Yes. Another audio sync problem!
by Mike Berry
on
Jul 17, 2008 at 10:02:47 pm
I have a project which features an audio track with still images added in time to the beat of the music (about one image every 1 second). When I preview the video from within Premier (CS3) everything is perfect. My image changes match up with the beat as I want. However, when I export the video (I mostly export as a Quicktime file), the audio no longer syncs up with the video. The difference is only a split second, perhaps 2 or 3 frames (through the entire 2 minutes) but quite noticeable, because you’re looking at the image changes on each music beat.
Following some advice I have seen here, I ensured the bit rate of my audio matches up with my project settings (48,000Hz in both cases) and also the audio is a WAV file, as opposed to a compressed format such as MP3.
I can match up the audio by deliberately moving it out of sync within Premier and then the resultant “bad” export plays right, but it’s not exactly a perfect way to do things!
Re: Yes. Another audio sync problem! by Mike Berry on Jul 18, 2008 at 12:26:45 am
Thanks for the info Vince. I took your advice and exported the file as a WMV and it played perfectly. Seems the problem may lay with Quicktime (or the way Premier is encoding the QT file?). I can't see any export settings in the Quicktime export section in Premier that might fix my problem. That's a pity as I much prefer to export Quicktime over WMV. But thank you anyway for solving my current problem.
Re: Yes. Another audio sync problem! by Vince Becquiot on Jul 18, 2008 at 2:06:33 am
I export Quicktime almost everyday without any sync issues, so it may be an isolated one. I however have isues with gamma shifts on h.264 (I hear I'm not the only one). It could be an Apple conspiracy to drive us all to Macs... hmmm
Re: Yes. Another audio sync problem! by Adam Shewmaker on Jul 18, 2008 at 9:35:54 pm
I am also having audio sync issues. I am attempting to export H.264, but the video lags about 5 or 6 frames behind. Exporting to .WMV works fine, but I would like to export H.264 if possible. Is there something in the export settings that I could be doing wrong?
Re: Yes. Another audio sync problem! by Mike Berry on Jul 19, 2008 at 3:16:38 pm
Like Adam, I am also exporting H.264. I've been playing around since my last post, but can't seem to get QT to export properly. WMV will do for my purposes for now, but it would be nice to find out what is causing this lag,
Re: Yes. Another audio sync problem! by Troy Murison on Jul 24, 2008 at 9:13:21 pm
Hi Mike,
Are you monitoring your sequence video on a external monitor via Firewire and sound through the soundcard of the PC/Mac? If so, that could be the issue. You cut your to audio that is 'on' and video that has latency introduced by the firewire device decoding the DV stream. When you export a file and view it, your cuts will be off by the amount of latency in your monitoring. To fix this, just make sure you monitor the audio from the FW device as well. If you're not using FW, or if this is just a new, recent problem on a formerly working system, I'm afraid I don't know.
Re: Yes. Another audio sync problem! by Rich Seemueller on Aug 15, 2008 at 1:16:57 am
I'm having the same issue and am also trying h.264. (I'm also having the gamma issues but have deemed that problem hopeless.)
I too have tried the WMV and it works fine so it's clearly an issue with the quicktime codec somehow. I'm not using any firewire or external hardware so it can't be that.
