Flv audio sync issues & player 9

Greetings, I've been looking for a solution for weeks, and
thought I'd give the forums a shot.
I have a client site with 6 progressively downloaded flv
clips that play when a button is clicked.
The flv files are encoded with After Effects 6.5, and the swf
files are published in Player 8.
The video clips are made with an alpha channel of a guy
talking and are about 30 sec to 1 minute long each.
The problem is audio sync issues on certain computers during
playback even when the files are completely buffered.
The other problem is that these flv files won't play on
computers that have player 9 loaded.
I'm investigating whether there are audio sync issues when
encoding flv files from AE 6.5, but still really
confused about the player 9 issue. I was wondering if there
are updates to 9 I can recommend to my client
or if adobe knows of any bugs that are currently being looked
into.
Thanks,
Kevin

I may just be talking to myself here, but...
Could there be any difference in the way an flv plays when
you
import the flv to the stage, as opposed to playing it
dynamically
using the NetStream class? Could this cause any audio sync
issues? Does Flash Player 9 have any difficulties displaying
flv files loaded dynamically?
Any ideas from Adobe folks would be great. Thanks.

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https://sourceforge.net/adobe/smp/wiki/Dynamic%20Buffering/
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Quicktime audio sync issues

Hello,
I have quicktime version 10 (128). I can't get anything to play in it without there being severe audio sync issues every time. I can't figure out why. Can someone please help me fix this problem?
When I export my movies from imovie to quicktime it will play in quicktime, properly and without sync issues, for a really short period of time - seconds. But after that, the audio no longer matches the video. I know it's an issue in QT because when I upload the video to YouTube there are no audio sync issues whatsoever.
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I am dissapointed to see that no one has addressed this issue. I have similar issues.
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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

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All of sudden I've started having audio sync issues with the mp4 footage exported from the The Flip Ultra camera. Ive tryed the mp4 footage in both windows 7 and Mac OS X and i'm having the same audio issue but when I watch in the flip software or in iMovie no issues. Any know why this has just started happening?

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2. exporting back to the camera from iMovie and then re-importing as 16 bit.
http://support.apple.com/kb/TA25603?viewlocale=en_US
http://discussions.apple.com/thread.jspa?messageID=8113985
Message was edited by: SDMacuser

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My mini dv deck died on me so,
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Hi team!
cc: petergaraway
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Kurt,
I have been following this thread and although I have a Sony HC-3 I share your pain. I do not have audio sync problems after importing its only when I add transition between clips that I have sync problems.
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Severe audio sync issues with DVR and RAI(Italian) channel.

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Hi:
Welcome to discussions!
From what I am reading, you are trying to use the audio that was in the original video-right? By that, I mean, you haven't added a voice over or music-just using the speaker's voice on the tape.
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[Quoted from iMovie Help]
Some transitions (for example, Cross Dissolve and Push) shorten your movie by a few seconds, depending on the speed of the transition. For example, if you add a transition with a speed of 2 seconds, iMovie overlaps 2 seconds from the first clip and 2 seconds from the second clip as it renders the transition. This shortens your movie by a total of 2 seconds.
The Overlap transition freezes the last frame of the clip on its left and superimposes it over the next clip. Fade In/Fade Out blackens the last frames of the clip on the left and the first frames of the following clip.
[End quote]
Or you could try extracting the audio from the movie so that you could edit it and sync it that way.
Sue

Audio Sync issues - PLEASE help

I have created many videos in iMovie '09. I have used the HD setting for them, 1280x720 even though they were shot in SD format. I have uploaded them to YouTube and they all view just fine. They all viewed just fine in Quicktime version 7.6.6, as well.
I have been doing this for years now, since at least 2009, and all video/audio has worked flawlessly together.
My most recent problem (past few months) has been that I am now running Mac OS X version 10.6.8. My iTunes is 10.4 and my Quicktime is now 10.0
And now my audio and video WILL NOT SYNC.
I need help very badly because I have a presentation on Saturday and I need to load a bunch of videos (in the same viewer window) and have those videos play in a loop, one right after the other, while I'm talking to prospective clients.
I put these same movies into Quicktime Player 7 version 7.6.6 and they play just fine, still - I just tested this on my imac and my macbook.
I need these videos to play in my iTunes, but the audio/video sync issues have ruined my video play.
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Hi DVDSP people!
I haven't posted or checked-in in a while, hope all is well with everyone. You guys have been so helpful in the past, I figured I'd see if anyone has any wisdom they'd like to share.
A DVDSP4 project of mine is having a very strange issue, which I've never experienced in all my (4) years of DVD authoring:
The final video content plays back beautifully on every set-top player and Mac DVD drive I can fine, as well as VLC, Windows Media Player and Real Player on a few different test PCs.
However, when playing back the video content using PowerDVD for PC (this is having tested with several different PCs and several versions of PowerDVD), the audio is slightly askew from the video, by at least 20-30 frames.
Does anyone here have ANY idea why this might be the case?
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Any assistance, comments or experience you could share would be greatly appreciated!
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Dual 1.25GHz G4 Mac OS X (10.3.9)

Luke, thanks much for replying. That's kinda what I figured, but it seemed strange to me that such a popular and highly-rated DVD playback software would "just be glitchy." Especially since Dell seems to ship it with all of their DVD-enabled PCs!
I suppose I could scoot the audio, but that would be more of a 'band-aid,' and it would also screw up playback on all the other platforms (on which the DVD plays fine). But I appreciate the idea, and I may just have to use it for the client approval copy (wink wink).
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Flv audio sync issues & player 9

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