MTS Audio Layer Issue

Hey guys, im not an expert with shooting video and understanding the different codecs/presets and such but I am using a smaller Canon Vixia HF-G10 and dragged my files from my local disk to the media browser in Premiere.. If you look at the timeline below you will see that every Video "layer" has an accompanying audio layer. I recently opened this same project and tried dragging the same existing files from the media browser to the timeline and I now do not get anything in the audio layer. The audio still plays but I cannot make changes to the audio at all. If you look at the last 2 items below they are the same file "00030.MTS". The first one shows content in the audio layer and the second does not.
Is there a setting that may have been changed on my part?

Click the A1 on the left until it turns light gray like V1.

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Audio layer causes "NOT realtime" on RAM Preview

Hi I am using a new machine I built mostly for AE and music video production.
Mac Pro 2008 - 2.8ghz 8-core
8GB RAM
AE CS3 + Nucleo Pro 2.0
Areca 1261ML
I have spent some time tuning the Nucleo & AE parameters to work most effeciently and I'm happy with the performance execpt for this issue.
What I am noticing is I get 29.97 fps playback with the RAM preview and NO audio, but as soon as I check the audio layer my fps drops to 22 fps and the audio only plays for only half of the preview. Most importantly the audio gets out of sync... It is frustratingly difficult to align video and audio like I've grown use to in AE7 & 6.5
Perhaps I'm missing a preference somewhere?
My comp is 29.97 fps 640x480. My project settings are set to 44.100 khz.
My footage is partially
60fps 640x480, 48K audio (audio unchecked)
30fps HD 720p , 48K audio (audio unchecked)
& mostly stop-motion jpg sequences taken from a 2MP camera.
1 song - 44.1khz wav
All my previous projects behave similarly.
All of this plays fine with no audio. However, even 29.97 SD alone still causes "NOT realtime" playback as soon as I check the audio on. This happens no matter if it is full-res or 1/4.
I have tried:
making sure all audio is set to 44.100Khz and also tried 48,000khz (with 48k audio)
changing the buffer size on the audio preference
swapping out the 44.100 wav with 44.100 mp3 or a 48,000 wav
Also tried switching to an external USB audio device in the audio hardware preferences - no change
still plays back in the 22fps range...
I don't remember having this issue on my XP64 quad core machine w/AE 7.0 OR with my old dual cpu XP box running AE 6.5.
As this Mac Pro is supposed to be for music video production. This is really an important issue to me and is making my work very difficult and tedious -- or I have to just render it out like in the ole slow computer days...
*EDIT* It does play 15 fps realtime -- if I tell it to skip 1 frame (just double checked - thought it played sluggishly too) But this is kinda upsetting... It should resolve my timing issues for now.

no effects on the audio -- it's just straight wav 44.100Khz.
Preferences > Audio Hardware > Built in line output
Preferences > Audio Output Mapping > Built in line output
System Preferences > Sound > Output > Built in line output
All of these settings in any configuration produce the exact same result. Presently set to "built in line output", I have also tried using the USB output and the ones labled "built in line input/built in line output" -- no success, even if all the settings are set to the same line or pointed to different audio hardware. Buffer size also has no effect.
I'm really stumped.
Also, my audio library is on a HDD by itself. I tried hard to set up the machine to not have issues like this...
I'd like to get a MOTU Ultralight for audio recording one day, but I don't think this is a $500 issue now. Plus, I doubt it will make a difference.
I mean 15fps works, but I miss stuff when I'm viewing stop-motion footage. I feel like I wasted a lot of money on hardware and CS3.

Can't access a stereo audio layer

Hey. I opened a Premiere Pro project I'd been working on a few weeks ago. The project has one video track and several audio tracks, one of which (track 1) in in stereo.
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Thansk

Can you post a screen-cap of your Timeline, showing that Audio Track in detail?
Might be something there.
Good luck,
Hunt

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The Stream info in MPEG streamclip for files from both cameras gives me this info:
Bitrate: 30.31 Mpbs
Video Tracks:
DV/DVCPRO - NTSC, 720x480, 16:9, 29.9699999999999 fps, 28.77 Mbps
Audio Tracks:
16-Bit Little Endian mono, 48 khz, 768 kbps
I don't know if this helps.

.MTS Audio Files help needed

I'm having a little trouble with editing.
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The video is playing fine (well, as best it can for my rubbish uni computers) but I am having trouble hearing the audio - and I'm getting lots of conforming errors.
I read here that CS4 doesn't support .MTS audio files. If that's the case then why can I hear some of them and not the others?
Should I be converting the audio into another format before editing? If so, then what's the best format to convert to, and how can I do it in a way that I don't have to strip the audio from the video (I want to keep them perfectly synced)
Thanks in advance for your help,
Nath

Hi Bill,
Thanks for your reply, that's an interesting article. The files I am editing are stored on an external hard drive - I tried deleting a few files on there to make some room (whilst I was in the editing suite) and it wouldn't let me delete them because it said I didn't have administrator permission - despite this being my own hard drive. Could that be causing a problem with conforming? Should I copy the files accross onto the internal drive? The scratch disks are set to the local D drive.
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Ps: I've just downloaded a program which is converting the .MTS files into .MOV. I don't really want to do this as this will probably loose quality - but I'm trying everything! What would be the optimum file type to convert to?

10.4.10 Audio Popping Issues: Information Check with Internal Speakers

For people with internal speakers, or those without subwoofers: Please read all the way to the bottom to find a test that will determine whether you are also having audio problems, even if you can't hear pops.
We've had a lot of discussion about audio popping due to 10.4.10, and the evidence indicates that the audio circuitry is going to sleep to conserve power, even on AC-only computers like the iMac, Mac Mini, and (at least one) Mac Pro. Some people claim to not have this problem, but I'm wondering if they just aren't noticing it.
Having external speakers with a subwoofer, set to high amplification, are key to obvious detection of the problem. Let the sound subsystem go idle for 30+ seconds (wait a minute with no audio, just to be safe), turn up your external speakers really loud, and cause the computer to make a sound. You should hear a burst before the sound plays. If you repeat the sound, you won't hear the burst. This is the sound of the audio circuitry powering on, and the speakers are amplifying it.
About 30 seconds after the sound finishes playing, if you leave the volume of your speakers turned way up, you should hear a "pop" as the circuitry is powered off. Then, playing another sound will recreate the burst.
I haven't been able to hear these sounds with internal speakers, either on the Mini or iMac. But the problem still exists, and it is detectable... if you know what you are looking for.
The burst of the audio circuitry turning on also causes a delay in the audio. The delay is a noticeable fraction of a second, an it can easily be detected if you have a repeatable source of sound. I like Terminal.app, because I use that application all day, every day. Here is how you can check to see if you are also subject to the audio problems:
1. Start Terminal.app (in the /Applications/Utilities directory).
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5. Now, quickly strike the Backspace key again. You should notice that the sound is produced immediately as you hit the key, without the delay you just witnessed.
6. Strike the Backspace key repeatedly, to confirm that there is no audio delay. Do this about once every second or two. If you press the key too rapidly, not all of the presses will produce sounds... this behavior is not related to the issue we are testing.
7. Wait another minute for the audio circuitry to shut down, and strike the Backspace key once more. You should again observe a delay between your strike and the sound production.
If you witness delays like this, your audio circuitry is also going to sleep, and you are having the same audio problems as the rest of us. However, either because you are using internal speakers, or because your external speakers don't have the appropriate response, you aren't hearing the same bursts and pops as the rest of us.
Please try this test, and report here. I want to build a list of people who previously couldn't hear the sounds, but still have the delay. This might give us a better picture of the scope of the problem.

Re: 10.4.10 Audio Popping Issues: Information Check with Internal Speakers
Your analysis of what is happening is right on.
The problem on my Intel Mac mini with external Klipsch speakers (two mid-range/high and a subwoofer) is REAL obvious as the system emits a hum like a Spinal Tap amplifier turned up to #11 when 10.4.10 powers down the audio circuitry
Then, if I play a song in iTunes, it first pops and the hum disappears right before playing.
Quite annoying.
Here's what I sent to Apple tech support:
Guys/Gals (OS X Engineers):
Concerning the Snap, Crackle Pop Audio problem in the 10.4.10 update:
Please. Just do the right thing and fix the audio.
There is no need to power cycle the audio subsystem to save .0005 amps on your laptops.
And then to make your Mac mini/iMac/other desktop users have to put up with it when using AC power is ridiculous.
Put the audio subsystem back like it was in 10.4.9 and let the laptop battery freaks looking for mini-amp savings get a "work-a-round".
Crikey!
Mac Mini 1.83 Ghz Intel Core Duo 1GB RAM Mac OS X (10.4.9) 20 Years of Microsoft-Induced Grey Hair

Playback pauses and audio sync issues with live video stream

I'm seeing playback pauses about every three seconds and audio sync issues with our live demo stream when using the OSMF/Strobe player. It happens on both our 2Mbps 720p stream and our 480p 750Kbps stream so it does not seem to be related to higher resolution/bandwidth streams. It also happens if I point directly to a stream asset or if I point to a .f4v with both streams listed for dynamic so it does not seem to be related to dynamic streaming specifically.
The same live streams play back very well without pauses or audio sync issues in the Akamai's dynamic player and even slightly better with JW 5.2.
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To see the stream with the Akamai player, go to: http://live.kulabyte.com
To see the stream with the OSMF/Strobe player, go to: http://live.kulabyte.com/osmf
I do not have JW set up for public viewing yet, but the two above show the distinct difference.
We are really hoping to start pointing our customers towards the OSMF player because of the support provided by the community and Adobe, but we have to get the quality of the playback to be acceptable first.
If someone has ideas on debugging I can PM the actual video assets to you.
Thanks,
Tim

Hi Tim,
You need to add this setting:
dynamicStreamBufferTime=8
The actual value can be higher or lower. The best practice is to use a value that is twice the keyframe distance. Anyway, try different values and see which performs the best for your content.
I know that the setup page does not contain this option and it is not documented in the UserGuide. We simply missed it. Sorry.
Also note that the dynamic buffering algorithms are not being used for dynamic streaming content. I tried to explain this here:
https://sourceforge.net/adobe/smp/wiki/Dynamic%20Buffering/
Looking forward to your confirmation that this solved your issue.
-Andrian

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
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The video clips are made with an alpha channel of a guy
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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
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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
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using the NetStream class? Could this cause any audio sync
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Quicktime audio sync issues

Hello,
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Audio Sync Issue on Export

Hello,
I have an issue with an export that I am attempting to do. I have used 50 still photos (psd) and created a slide show in after effects. It is working well. I attempted to create 4 comps made from standard dv footage. 720 x 480 from video cameras in the 1990s. I need to export out eventually to 1920 x 1080 for showing on our TV channel. It would be a .m2t format. When i attempted to do a test export, everything worked fine....the photo comps were good, the only problems were the video clips that had video/audio sync issues.
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We need to know a lot more to help you. Please provide answers to the questions listed here: "FAQ: What information should I provide when asking a question on this forum?"

Trouble exporting 11-min film as XML because of audio translation issue

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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

Haw to maintain adio layer linked to an effect property after replacing the audio layer?

Hy,
i have an effect applied to a layer and a certain property of that effect (turbulent displace) is controlled by the "both channels" af my audio layer / audio amplitude generated layer.
What i need is to make somehow possible for the client to add his own audio layer and in the same time not disturbing the link between the effect property & my audio later.
I cannot use an audio so that he can simply replace mine...i need a way to give him the possibility to add his own audio file, generate his own "audio amplitude" by converting keyframes and still maintain the link I created between my original audio layer and the effect property.
I hope i was clear enough and someone can help me...
Thanx!

Thank you for the reply!
I never put the curly brackets when there is only one number since it saves some typing. I tried this time, but it made no difference. Also tried writing 1 instead of "true", still the same problem. I also tried this expression:
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[temp, temp]
The same problem persists. The preview sounds wrong, the render sounds right.

Help please... Audio sync issues going from iMovie to iDVD (iLife '09 packa

I've tried technical support, I've tried looking online but nothing seems to have helped, so here's the problem:
I have a video/movie, that is around 58 minutes long, I share it to iDVD and the other media formats from iMovie. The vid has music, transitions, titles, credits, etc... It plays fine in iMovie while I am editing it. The problem comes when I try to export it to another media format and to iDVD.
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I've tried some of the suggestions I've come across but nothing seems to work. Does anyone have anything that they can offer this very frustrated guy? Please and thank you in advance.

I don't shoot 12 bit audio (ever) so I'm not an expert on fixing it or converting it back to 16 bit audio. I can only report what others on this forum claim to have worked (in some cases with marginal success).
The ones that comes to mind are:
1. video and audio extraction in an attempt to re sync.
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

MTS Audio Layer Issue

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