Audio/Video out of sync on export
by Charles Ryan
on
May 6, 2008 at 9:20:24 pm
I just upgraded and installed Adobe AE CS3. I had been using 7 until recently. Unfortunately for my first project in CS3, After Effects is no cooperating. I have about a 30 second project, that has no video, just still images, and different After Effects layers (solids, text, etc). I also have a .wav file (CS3 does not let you import .mp3's anymore?) Every time I export the audio and video are out of sync, about 3 seconds or so. When I preview within After Effects, everything is perfect and in sync. Since I installed, I did not tweak any settings, or make any adjustments. Are there any settings I should look at? As far as the exporting goes, I have exported in just about every codec and container type, to confirm that it was not a codec issue. None of them have worked. Any help would be greatly appreciated.
- Charlie
Re: Audio/Video out of sync on export by Brendan Coots on May 7, 2008 at 12:36:24 am
AE never handled MP3s well, just like it tends to hate on MPEG-4/MPEG-2 files. The MPEG format is based on interframe compression, meaning you can't stop on a single frame and get info on that frame, frames are treated in groups. Since AE works on a frame-by-frame basis, it has a hard time with these formats so you shouldn't use them regardless of whether or not you can get AE to import them.
Anyway, on to your issue. Make sure that the audio settings in your render module match the audio settings of the file you imported. For example, make sure both are 44.1khz (or whatever), same bit rate etc.
If this doesn't solve your issue, please tell us what format you are exporting to, along with all of your settings. It is clear that there is something in your render settings causing the issue.
Re: Audio/Video out of sync on export by Charles Ryan on May 7, 2008 at 3:09:23 am
Thanks for replying. The audio file was originally an Mp3 at 160kbps, and 44khz. I converted it to a .wav at 32 bit float and 44khz. In AE, I have attempted all kinds of different codecs and containers, and different settings combinations. For example, before writing this reply, I exported my comp as an uncompressed AVI (no video codec, millions of colors (no alpha, 29.97 fps) and I set my audio to compressor: none, rate: 44.100khz, size: 16 bit, use: stereo, and this did not fix my sync issues. Since this comp is only 28 seconds, I'm open to use any codecs/container, hopefully the best quality as possible (Output is for DVD). I am going to try and convert my mp3 using different settings, but any other suggestions you may have I'd appreciate.
Thanks in advance,
Charlie
Re: Audio/Video out of sync on export by Charles Ryan on May 7, 2008 at 3:31:44 am
Well I realized in my above post that I wrote I was exporting at 16 bit, though the .wav was at 32 bit float, so I changed it to 16 and replaced the file in AE, but it did not help. In SoundBooth I exported the mp3 into different formats (.wav and .aif) and at 8bit and 16bit, all at 44.100khz but the problem did not stop. I'm fairly stumped at this point.
