Audio B-wav issues

Can anyone shed any light on a very frustrating problem Im having with Protools B-wavs...
Workflow is...
Shot on one of the first Red Ones at 4k 24fps
Offlined Prores conversion (2k) 24fps
Media managed and clipfinder xml to link to color 24fps
graded and rendered out to Digital Cinema 2k Prores 4444
Audio omf from Offline to Protools
5.1 audio mix 24fps
export 5.1 stems and stereo ltrt to Bwavs
Import to Online project.
All the B-wavs show incorrect start time and durations in FCP
Quicktime player shows them to have correct duration
SoundtrackPro likewise.
If I create a 25fps project and Import them FCP shows the correct duration and if I then create a 24fps sequence in this project and paste the audio files in everything is correct.
Pix pasted on top – all in sync. Online done.
24fps picture exported
Audio files exported (for DCP Creation)
All audio has reverted to the original duration (wrong length drifting)
The quicktime output shows the audio is in sync but the audio tracks are all in the wrong order and some are not there at all.
OSX 10.6 (latest version)
FCP 7.03
Fibrechannel Raid with Apple Fibrechannel card.
Im assuming the original B- wavs are fine as they seem OK everywhere but in FCP
Any light greatly appreciated!
Sean

with RTMFP, video and audio can go out of sync if the data
rate of your stream exceeds your network capacity. video is
currently sent with 100% reliability, so once it's queued for
transmission, it's going to be sent (eventually). video is lower
priority than audio, though, so your audio data gets first dibs on
your network capacity. if the video stream's data rate is higher
than what fits in your network (after audio), the video data will
back up until its send buffer is filled, and new camera frames will
stop getting captured. in the steady state, this can look like a
multi-second offset between the video and audio.
try turning your video rate/quality down so that it fits in
your network capacity. video and audio should stay in sync.
with RTMP, there's one network transmission buffer (TCP's)
for all of the parts of your stream (audio & video). when you
have insufficient network bandwidth, the TCP buffer will eventually
fill up and video frames will stop being captured to compensate. so
while audio and video might remain in sync, the total end-to-end
latency will go up. when using RTMFP, the audio and video have
independent transmission buffers, so in cases of insufficient
network resources, the higher-priority audio should remain more
timely but video may fall behind.
-mike

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Greetings,
I'm posting this to a few forums, hoping to get some feedback
regarding a strange, consistent, and somewhat unnerving issue
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I had not noticed the problem, never starting a project from
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I have checked this issue out adjusting different properties
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b. Bit rate (16, 8)
c. File format ( .aif, .wav, mp3)
I have also tested using different frame rates (15, 24, 30),
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I have an example of one of these tests up on my website
here
(http://www.csiga.com/flash/avSyncTest.zip). It's the 11k8b audio
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Mb.
I would be very curious if anyone could share some thoughts
about this issue. It would be useful to find some way around this
problem. There are many Flash based productions that migrate to
video in New York where I'm based. I'm sure that the community
could benefit from any insight.
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Jonathan Levy

The issue stems from the fact that Flash was never intended
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seconds.
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timeline in flash - it will lead to other
problems like the FLA getting so big and ultimately crashing
(potentially).
Hope this helps.
-c
~~~~~~~~~~~~~~~~
--> Adobe Certified Expert
--> www.mudbubble.com
--> www.keyframer.com
~~~~~~~~~~~~~~~~
jonathanhl wrote:
> Greetings,
>
> I'm posting this to a few forums, hoping to get some
feedback regarding a
> strange, consistent, and somewhat unnerving issue
regarding drift between
> sync/streamed audio files and animation sequences on the
timeline.
>
> A colleague of mine is doing an animation project over
ten minutes in length
> in Flash. He was reading frame numbers to create a track
breakdown for exposure
> sheets (old school) and noticed that the sound was
slowly drifting out of sync
> after a period of time. He sent me an email to ask
whether I have noticed the
> same problem. We have both worked on projects using
Flash as a tool for video
> work.
>
> I had not noticed the problem, never starting a project
from that direction,
> so I decided to do some tests. I created a 5 minute (300
sec.) audio sequence
> of 1 KHz blips at every second. I imported this file
into Flash and set in on
> the timeline in stream mode. I then made a little dot
and made a one second
> sequence at 24 fps and copied that sequence up to 300
seconds. After 5 minutes
> length over the time, the audio blip drifted away from
the dot by ten frames,
> or .4 seconds. The audio file also ends short of the
animation sequence.
>
> I have checked this issue out adjusting different
properties of the audio:
>
> a. Sample rate ( 44.1, 22, 11)
> b. Bit rate (16, 8)
> c. File format ( .aif, .wav, mp3)
>
> I have also tested using different frame rates (15, 24,
30), yet the drift
> appears to be constant.
>
> I have an example of one of these tests up on my website
>
http://www.csiga.com/flash/avSyncTest.zip
> (
http://www.csiga.com/flash/avSyncTest.zip).
It's the 11k8b audio at 24fps
> version. It's a tiny archive (38k), but decompresses to
6 Mb.
>
> I would be very curious if anyone could share some
thoughts about this issue.
> It would be useful to find some way around this problem.
There are many Flash
> based productions that migrate to video in New York
where I'm based. I'm sure
> that the community could benefit from any insight.
>
> Thanks.
>
> Jonathan Levy
>

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Save me from this fustration.....

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http://forums.adobe.com/thread/1357792?tstart=0

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Lamont,
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