Audio/video synch issues

Hi-
I *Just* got a new Mac Pro last night and installed FCS with FCP 7. Updated everything.
I captured NTSC Dv video in ns 48K from my Sony HVR-m25U via firewire. The audio/video are a little out of synch.
It's been a few years since I've upgraded FCP. My last version was 5.1. Is there soemthing in preferences I should or should NOT check? I vaguely remember this issue from years ago but can't remember what it was.
Also, I currently only have 3gb of the installed memory int eh amchine. 16 gb are arriving on Wednesday. Could this be a problem?
thanks!!

Thanks for clarifying!
I am monitoring the audio through Bose speakers that are connected to the audio output of the compute
If you go to the menu View > Audio Playback, what is selected?
"Default" Audio follows video is grayed out.
if you go to the menu View > Video Playback, what is selected?
A grayed out "(Missing) Apple Firewire NTSC"

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Is this an audio/video synching issue of flash?

Hi,
Good day.
I am having synch problems with externally load FLV and audio
on my flash presentation (which is not online, but for CD)
Scenario:
- My presentation is 10 mins long with animations, embedded
audio, and externally loaded FLVs.
- the FLVs are loaded from flvplaybacks, and are set to
autoplay: true (because they load on certain timelines) and
autorewind: false.
Problems:
1. the loading of FLVs won't stick in synch with the
timeline. For example, when I readjust the timeline to fit the
length of the FLV movie, it works for awhile. But when I reload it,
or plays on second or third loop, or play on another machine, the
synching is off.
2. the audio won't stay in synch with the animations or
video. When I readjust the timeline, it would sync for awhile, but
the same happens with no.1 above (the synching goes off again on
second or third loop of the presentation, or when played on another
machine.
3. I can see the first frame of the video when it reaches the
end of the film. The original video (on .mov) does not have it.
By the way, it gets worse after a few minutes. Like after 5
minutes of the 10 mins presentation, the synching of audio and
video are completely off.
Any response or discussion would be appreciated. Thanks in
advance.
Text

Hi,
I am able to solve this using the FLVPlayback.playheadUpdate
event. I set the FLVPlayback.playheadUpdateInterval to 2000
milliseconds (or 2 seconds). FLVPlayback.playheadUpdate event gets
triggered every two seconds. In this event I check what is the
frames of the swf file that shold have been loaded (No of seconds
the video has played * 25). Then I gave a Gotoandplay command to
play from the appropriate point in my swf file.
To summarise, I am synchronizing the animation and the video
every two seconds.
Regards,
Prakash

Audio/video synch issue

Hi all,
After installing OS Mavericks, all my audio and video is not synch. Wich for me is a big problem since I edit video for a living. Anyone who can help me? My software for editing is out of synch, but movie's from website's are.
Thanks

Danny I sent you a private message to get your account info.
Anthony_VZ
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Audio Video synchronization issues

Hi,
I have a video application that I am building - and
previously I used FMS and TCP connections for video. Now expecting
the latency to be much lesser with UDP, I implemented UDP in my
application and stratus as the RTMFP capable server. I used the
sample video phone application's tutorial do a simple sendStream
and receiveStream for video.
However, unlike the hosted sample application itself, my
audio and video are completely out of synchronization - about 4
secs!! I tried to look at the sample code to see if there were any
special settings that were made. I could not find any.
My questions:
1. Did Adobe make any special tweaks in their hosted sample
application? If so, what are they?
2. Are there any known synchronization issues with using
RTMFP connections for video?
3. Does anyone else also face audio video synchronization
issues?
4. If none of the above is true, what do you think my
mistakes are? Please let me know if I need to add more information
to answer this question.
Thanks in advance.
Rohan

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

Audio and Video Synch Issues

Is there a way to fix the audio/video issue in playback? I know adobe pro warns you that it does that, but is it only during previewing or will it also do this when the file is published?

You are talking about directly embedding the video into the main timeline, correct?
For the most part, believe what Adobe says about not embedding video in the timeline or you may have audio sync problems..... which are actually video syncing problems. The auto will play exactly as it's supposed to, it's the video that gets out of sync.... NOT the audio.
The problem usually come up because you are attempting to match the audio up with the video... which is really the wrong way to go about it. Video can to speed up a little or slowwed down a little without really affecting the end result that much.
Not so with audio! Any speeding up or slowing down in an attempt to "match up" with the video, changes the frequence of the audio, distorting the sound. That only makes sense, right?
So if you have one minute of audio, you can't change that to 1:05 by slowing it down slightly, and you can't speed it up to play in :55 unless you want a little "chipmunk" effect. Either method changes the frequency and pitch of the sound.
Understanding that is key to using this particular embed method.
So if for some reason I just have to embed a video, here's a method that works pretty well for me. Set the Flash doc frame rate to exactly match the frame rate of the original video.
That means, for example, if the video was captured at 29.97 frames per sec., set the Flash doc to exactly match that....29.97fps. This will tend to keep the video and audio pretty well synced.
Here is a quick sample of an embedded video. The video bitrate is 400kbps.
http://www.cidigitalmedia.com/tutorials/vid_sync/vid_sync.html
You can test and judge for yourself how well this method works.
Now there are some potential problems. If the video bitrate is too high, the video may not download fast enough... just like any other high bitrate video. Second, there are Flash timeline limits, so you can't really embed a 20 min. video into the timeline and expect it to work.... but then you shouldn't really be using the "embed in timeline" method anyway.
But it is possible to get pretty good results with short videos (with audio) embedded directly into the main timeline provided you set the Flash doc framerate to exactly match the original video and you use a reasonable video bitrate.
Best wishes,
Adninjastrator

Audio / video sync issue in playback

for every recording i've made, when i play back the archive there is noticable lack of sync between the audio and the person's mouth. the video seems to lag behind by almost a second. the good news at least is that the delta is constant.
has anyone else experienced this? it's happening in any scendario i try, even if i'm just recording myself.
is the LCCS dev team aware of this? since audio and video streams are recorded separately, is there any way for me to programatically 'nudge' the streams into sync?
it's currently a show stopper, it looks really bad when the sync is so obviously absent.

finally getting back to this..
i did as you suggested and recorded a video of myself using the recording and playback examples provided with the SDK (the 2.2 newest version btw).
the de-syncing of audio and video is definitely there. it seems especially bad for longer recordings. however, an interesting thing i discovered in playback:
- sometimes, if i drag the playhead somewhere in the recording, pause, and then hit play, video and audio fall into sync.
- if i start playback from the beginning of the recording, audio/video is always out of sync.
i understand that the video and audio streams are recorded separately and thus played back separately. my guess is that when those streams are retrieved and playback begins, one starts before/after the other because they're not retrieved at exactly the same time. it seems some extra work is required to ensure that their playback commences at exactly the same timestamp within each stream.
i can provide my recordings as an example if required.
this is a total showstopper for me. it renders the entire recording service useless if the playback can't have sync between audio and video. i would be happy to help with testing this more. can someone from the LCCS team comment on this issue?
thanks
adam

Why Wont Apple Fix AUDIO / VIDEO Sync Issues

This has been a problem for awhile. Thank god there is a application fix but im receiving an iTouch very soon and I'm not sure if the same problem is going to be on that to..
It might be how Quicktime reads .MP4 and .M4V Files but i can play the videos on VLC and Zune Software fine..
I see other people posting this exact same problems. I see no answers... Apple Knows this is an issue. Why wont they fix it.
From what im hearing it is the audio that is going out of sync from the video.
Now my Final Question is
"Is this just a Software issue for the computers or is it also a Software issue (Assuming that quicktime is the software on these devices) for the iTouch / iPhone ?

well i got my itouch today and it seems that the audio and video sync issues are only on the computer distributions of quicktime and not the hand held device versions

Audio / Video Syncing Issues

Hello Everyone,
I own a 2011 MacBook Pro with a 250GB SSD and 8GB upgraded Ram. I'm currently using iMovie to create an hour long movie with images / audio / and voiceover in certain sections.
I have been working on this for quite some time and would like to be able to export it the same way I'm able to view it inside the Application. However, when I export the movie the audio / video / voiceover is off and it does not match with what I have worked on inside the project.
I have also tried breaking down the movie and exporting it in sections but the audio is still not syncing correctly on the export.
Please can someone help me out and help me explore my options.
Thanks in Advance,
Mauricio

Sorry for the confusion. To clarify:
The Video and Audio are OOS. Let's say that at the beginning of the Clip, the difference is ~ 12 frames off. Is it still that ~ 12 frames off at the end, or is it now ~40 frames OOS?
Though the best is to Capture with no OOS issues, the former is fairly easy to fix. The latter takes more work.
Also, whether the OOS is constant, or dynamic, might lead to figuring out where this issue is being introduced.
Good luck,
Hunt

Audio/Video Publishing Issues

I've narrated three videos and have included two small flash videos into my project. When I publish the project, the video and the audio don't play. Any advice for resolving these two issues would be much appreciated. Thank you.

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

A105-S4284 audio/video playback issues

When I play a CD or DVD using Media Player, Media Center, iTunes or InterVideo WinDVD, I get choppy/slow video and slow/choppy audio with popping sounds. When I play video or audio already on my hard drive or stream from the web I don't have this issue. I've tried uninstalling the audio, video and DVD drive drivers, then let Windows find and re-install the drivers/hardware and the problem is still there. I've tried downloading and installing the latest drivers on the Toshiba site for audio and video and still the problem continues. I also dowloaded and installed a much newer but generic video driver from Intel's site and I still have the issue.
Anyone have any other ideas?
Thanks.
Solved!
Go to Solution.

Ok so I'm a bit of a dummy. This issue has been really bugging me so I decided to try a lens cleaner to see if it would help. It didn't unfortunately. I then uninstalled the drive and rebooted rather than scanning for hardware changes. This improved things a bit-I was able to play a cd normally in Media Player but nothing else. I checked the IDE controllers again and the secondary channel this time was running in PIO mode. I uninstalled the sencondary controller, rebooted and voila! The controller reinstalled, is now running in Ultra DMA Mode 2, DVDs and CDs now play fine. Either the lens was dirty and causing time out issues while reading discs which caused the change to PIO or I just missed it when I first checked. Either way, thanks for the help.

Audio/Video Synch Problem

I have the motorola HD DVR and am using it with the Zenith 19" LCD HDTV I finally got from Verizon. After watching a channel for a few minutes, the audio and video go out of synch. If I switch the channels back and forth the problem is corected for a few minutes. Has anyone else experienced this problem?

In regards to an A/V sync problem, I've just noticed in the last two or three days that the voice is no longer synced with the lips on both of my DVR equiped TVs. One's an HD unit (but TV is Std) and the other is an Std unit. Will rebooting the units fix or improve this problem? Is there another way to correct this if that doesn't do it?

Audio/Video sync issues after exporting

Two quick issues:
1. I've recently exported a project from FCE4 to quicktime and am finding that the audio is slightly out of sync with the video everytime.
Is there an ideal format or setting I need to export at to avoid this?
2. Also, I've edited two projects using the same clips and keep finding that the second one I make seems to make the video very narrow when I export it. Is there a setting I need to use to avoid this, or does the problem lay in the setup?
Cheers!
John

From what I see in your info, the clips don't match the Sequeunce.
Furthermore, the clips are not FCE freindly. Probably required rendering?
I'd suggest using Streamclip to convert the H.264 clips to the exact specs of one of the FCE>Easy Setups, audio and video properties, then start over.
http://www.squared5.com/
BTW: Whatever you convert the clips to must match the Easy Setup, so that you work with Clips and Sequence being the same. The best way to acheive this is to start a NEW Project, set the Easy Setup first, then bring in the the matching clips.
Using Item Properties in Browser>Seqeunce/Clip is one way to confirm matching specs for both.
Al

Final Cut Audio/Video sync issues

Yes, I realize this has been discussed before, but for the life of me I cannot find the answer. So here we go.
- FC version is 7.0.2
- OSX is 10.6.3
- Processor 2.8 Ghz Intel Core Duo 2
- Memory 4 GB 800 MHz DDR2 SDRAM
I have used FC before and well acquainted. Recently I took a brush up course and used material provided in a book DVD. Had no issues while practice editing with this material.
Now have material saved I want to edit with. All video is saved on an external and in MOV format. No worries getting in imported in FC. However, every video I use starts to audio slide and by the time it reaches around halfway, full blown out of sync. Not by much, but it's definitely there.
I even took these videos and re-saved them in MOV format and same thing. With all this RAM there should be no need to shut anything down, but I did so. Same thing.
The interesting part is when using the test videos that were supplied on DVD and were imported into the MAC, no worries. Now I AM bringing those videos over from a saved file on the MAC itself, but that should make no difference. When bringing over the external movies into FC, they should react without a hitch.
Here's the fun part. ALL of these videos play perfectly on IMovie. All of them. So this makes me think there's something in the FC settings at work here. Then again, why did it not fault before?
One more thing. I recently upgraded to Snow Leopard and have seen a few glitchy items here and there. But this is the oddest.
Would really appreciate thoughts and suggestions. Frustration is setting in. And thanks

The first thing I'd check is to make sure the audio clip's settings and the FCP Sequence settings match. For example, if you use AIFF 32khz, 12 bit audio in an FCP Sequence set at AIFF 48khz, 16 bit, the audio WILL be out of sync as you describe.
-DH

Audio video sync issues with iMovie 11

Hi: I've been using Roxio Video Capture software to convert VHS tapes to digital (quiktime) movies in preparation for saving them on DVDs. Most of my clips seem to have synchronization issues and I am at a loss as to how to fix them. Most of the historical blogs and forums get either very technical or simply do not work for me. I am far from being expert at using iMovie or performing editing tasks so I could use specific expert help with this problem. So far I have learned how to detach the audio, but am at a loss as to what to do with it once I detach it

Hi socalhkc!
I have a couple of articles that might be able to help you adjust the audio in your iMovie project:
iMovie '11: Set the beginning and end of a sound or music clip
http://support.apple.com/kb/PH2258
iMovie '11: Extend a video clip’s audio over the next clip
http://support.apple.com/kb/PH2260
I hope that provides some guidance for you. Thanks for being a part of the Apple Support Communities!
Regards,
Braden

24P Advanced - Audio/Video Synch Problem on Capture

I shot some footage in 24P advanced. When I capture into FCP4 (settings are 23.98 timecode, 2:3:3:2 pulldown removal), the video and audio become out of synch (in the canvass -- I haven't bothered dragging anything to the timeline yet).
I shot with a Canon XL2 and am importing with a Canon GL2. I usually shoot with a Panasonic AG-DVX100 (and import with a Panasonic) and never had this problem before. I'm in a bit of a time crunch, so I'm starting to get very nervous.
I used "capture now," not log & capture.
Any ideas? Thank you very much.

Was the camera set at 24p 2:3:3:2, or just 24p 2:3. If it was set to 2:3, your capture settings with easy setup will simply be, DV-NTSC. If it was set to 2:3:3:2 your settings for footage from an XL2 should be Easy Setup - DV-NTSC (23.98) Advanced Pulldown Removal, and you capture setting will be changed to DV NTSC 48 kHz Avanced 2:3:3:2 pulldown removal. This captures at 29.97 (DV NTSC) and puts your footage into a 24p timeline.
I'm suspecting that your camera wasn't set to 2:3:3:2 because that is not a default setting. Which is fine for playback on a TV, but not optimal for playback to film.

Audio/video synch issues

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