audio sync issues

[frambosenshmak]

I rendered out a 60 frame sequence from Maya that was animated to audio at 24fps.
I brought in the the sequence and same audio file into after effects and made sure the footage was interpreted at 24fps and the composition is also set to 24fps. Everything looks great and syncs up in after effects but when i render it out, the audio is now out of sync. Im also using wav files and not mp3s.

any ideas?
Thanks

getting a somewhat similar export problem myself except the project was created in after effects originally. 25fps 720x576 dvpal widescreen project with 44k audio. project audio set to 44k. when i preview the scene it is in sync but when i export it as a quicktime (same settings as project) the audio is a frame or two out of sync!

i've tried quicktime lossless, animation codec and dvpal codec all with sound and then exporting without sound and lining up the audio in premiere but the sync issue is still happening.

anyone else getting this or know of a solution?
thanks

[suztv]

Have you tried using quicktime pro, soundtrack pro or audition to apply the audio? I remember having similar issues back in AE 3.0 but not recently (we called it audio float). Another option would be to use aiff format - wavs can still cause some issues in AfterEffects depending on how they're compiled.

[Mylenium]

I rendered out a 60 frame sequence from Maya that was animated to audio at 24fps.
I brought in the the sequence and same audio file into after effects and made sure the footage was interpreted at 24fps and the composition is also set to 24fps. Everything looks great and syncs up in after effects but when i render it out, the audio is now out of sync. Im also using wav files and not mp3s.

any ideas?
Thanks

Check the sample rate of the file! AE is crap at handling odd rates. Preferably it should be 44 kHz or 48 kHz and, which is the important part, you system's audio settings should match those rates as well. Also turn off that perceptional "audio enhancement" crap on your audio devices, MediaPlayer and wherever to guarantee playback without delays.

Mylenium

[frambosenshmak]

Have you tried using quicktime pro, soundtrack pro or audition to apply the audio? I remember having similar issues back in AE 3.0 but not recently (we called it audio float). Another option would be to use aiff format - wavs can still cause some issues in AfterEffects depending on how they're compiled.

hi suztv,

thanks for the suggestion but using another piece of software to compile audio and video is supposedly what after effects is meant to be able to do in itself.

i've noticed that vlc player wont play the quicktime files properly and if it does it wont play the audio in the .mov file. the quicktime audio/video synch is 3frames out - we loaded the .mov file into finalcut pro on another machine and the audio is still out of sync. we moved the audio track 3 frames forward and it is now perfectly in sync with the video. whats puzzling is how after effects is interpretting the render like that. i've never seen this before in previous versions of after effects.

does anyone have any ideas?

[suztv]

AfterEffects doesn't handle audio well - period. I have had several instances like what you describe with audio float (the audio being off by a few seconds, or it not playing at all). I would follow Mylenium's advice or at the very least run it through an AUDIO program to make sure the sample is at the correct rate. Final Cut Pro may be doing the same thing and bringing in the file but not converting it to the rate that you need it to be. I have had files that said they were 44khz only to find out they weren't (found out by bringing them into Audition,Soundtrack Pro or SoundForge). You can convert the file to the correct rate in those programs and it will only take a few seconds.

[frambosenshmak]

AfterEffects doesn't handle audio well - period. I have had several instances like what you describe with audio float (the audio being off by a few seconds, or it not playing at all). I would follow Mylenium's advice or at the very least run it through an AUDIO program to make sure the sample is at the correct rate. Final Cut Pro may be doing the same thing and bringing in the file but not converting it to the rate that you need it to be. I have had files that said they were 44khz only to find out they weren't (found out by bringing them into Audition,Soundtrack Pro or SoundForge). You can convert the file to the correct rate in those programs and it will only take a few seconds.

it is at the correct rate. 44k. the audio was given to me by the nice chap working here in soundforge who works with audio specifically and theres nothing wrong with the sample rate of the audio. the problem lies within after effects.

if after effects doesnt handle audio well then why market it as an application that can export/output video with audio? It is after all a compositing tool with a lot of people requiring their video composites/effects/timing to sync to the audio in places.

i'm not a new user of after effects here and have been using it since version 4 and have never come across this problem. I've seen issues with mp3 crashing and also using incorrect project and clip frame rates causing audio output problems but never this.

so thanks again for the advice but i've already addressed these issues and it didnt provide a solution to the problem

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