CS4 Audio Sync Issues After Render in Media Encoder

I'm editing a 6-part online promotional video right now using Adobe Premiere Pro CS4, using MPEG footage (MTS) imported from a Panasonic AG-HMC40 AVCCAM HD. Upon rendering each video to a Quicktime mov in Adobe Media Encoder, there's always at least one instance in each video where the audio is out of sync or there is a 1 to 2 second jitter in the video. Otherwise, the final product looks flawless.When viewed in the timeline, the video/audio mesh perfectly (although, if I keep re-playing the problem clips in the timeline, I can occassionally see some jitters). The same issues occur when rendering to H.264 Youtube Widescreen HD.
Anyone have any suggestions?
File Info:
Type: MPEG Movie
Image Size: 1280 x 720
Pixel Depth: 32
Frame Rate: 23.976
Source Audio Format: 48000 Hz - compressed - Stereo
Project Audio Format: 48000 Hz - 32 bit floating point - Stereo
Average Data Rate: 2.1 MB / second
Pixel Aspect Ratio: 1.0

No, there is no blacklisting here. Now, some might be a tad confused by "Render" in the title, but I'd expect them to read, and understand. I just pointed that out, to avoid confusion down the thread. I expected to read of a Render messing up the sync, but it became very clear exactly where your issue was occurring.
I wish that I had more to add, than a question on the H.264 CODEC, but have not encountered this myself. I'm only relying on what seems to have worked for others, and might not have any bearing on your issue.
Good luck,
Hunt

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Message was edited by: gratefulredhead

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Message was edited by: SDMacuser

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Sure!
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So frustrating that nobody knows why. Audio Sync issue.

I have an imovie project of old family footage that was ported over from VHS through a sony dcr pc120e mini dv cam straight through to intel imac via firewire. The imovie project is flawless and the sound is perfectly in sync. ive exported to idvd and when finished the audio is out of sync on the final disk. Now i have been reading about this issue and see that people blame idvd8 but it happens when i make a dvd with my imovie project using toast titanium 9 too. Surely if it plays perfectly as an imovie project there must be a way of transferring to dvd without audio sync issues. If anyone knows a solution or piece of software that will remedy this please please let me know as i have wasted about 12 dvds in various experiments.

mogreen wrote:
camcorder on 16bit, i am using a vhs player attacthed to camera then firewire to imac, ... the imovie project is perfect in everyway. Everything is pal. Yes i did export to QT within IM and this was also out of sync.
thanks for answering some of my Qs ...
there's one thing, I do suspect, which was a 'source' for sync-weirdness for years.. which is the AUDIO connected to some video.
you told us, video is 25fps, and audio is included 16bit (which is good...)
I assume, adding some NON-conform audio could cause trouble... (as a 12bit audio would cause outofsynciness) .. we do know very little about, how iM08 handles audio+video internally, we 'Silverbacks' had long discussions about really weird side effects as a 'zooming' of dvfiles on export etc. I wouldn't be surprised, if adding some non-iTS, non-48kHz-aiff, non-whatever... causes such an effect.
so, please answer my audio Q from above: source, format, bitrate...?
and just for curiosity: how long is your project in total? hh:min:sec?
==edit==
pops into mind: in iM vers3, there was some 'bug', concerning PAL wrong audio and NTSC good audio ... wow < scratching bald head > .. try to contact some wiseguy with better memory..
Message was edited by: Karsten Schlüter

CS4 Audio Sync Issues After Render in Media Encoder

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