RAM Preview Audio Skipping Issue

- After Effects Version: 13.2.0.49 (This is the most recent update as I installed it today)
- OS: Windows 7 Home Premium
- So, I rendered out a clip from Media Encoder in H.264 format, and imported it back into After Effects and attempted to use RAM playback. The video plays fine without skipping, but the audio plays back partially, and begins to leave out certain parts. In other words, the audio says, "I'm going to try to spend more quality time with Luke, last time didn't go too well", After Effects plays back "I'm going to try to spend more - last time."
- I rendered out a series of clips. However, only the first two that I rendered in Media Encoder playback the audio in After Effects correctly, the rest all have skipping audio in AE only. I can play them back in Windows Media Player perfectly.
- My PC setup is: Intel Quad Core i5, 8 GB RAM, Nvidia GeForce GTX 650 series video card, 1920x1080 monitor, and 1 hard disk.
- My GPU driver is: GeForce Game Ready Driver (version: 344.65)
- I render all of the video clips using H.264 format in a .mp4 container.
- Quicktime version: 7.75.80.95
- I am only using After Effects for all of the video and audio and Media Encoder to render.
- No third party effects or codecs.
- I don't think I am using OpenGL features. (I'm not sure)
- This, as previously stated happens when I preview the already-rendered clip in the RAM preview, but it also happens when I put the rendered clips together in one video and render them out again.
- I am not doing any multiprocessing frame rendering.
- I am not using the ray-traced 3D renderer.
- If it helps, here's my output settings on Media Encoder:
Audio settings:
Video settings:
NOTE: I followed the FAQ guidelines as best as I could.

First, try exporting using one of the presets.
Second, H.264 has highly compressed audio and AE does not like that very much. If you are intending to do more editing on this video clip then you should be exporting a production format not a highly compressed MPEG format. Your audio problems are most likely caused by using some non standard settings somewhere along the way. That's why you should pick a preset and not mess with the audio encoding at all.

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AE CS5 (10.0.1.19) Ram Preview - Audio stops and continue playing randomly

I already reported this issue to Adobe as a BUG but I want to ask here if somebody else have this problem or can confirm it.
Audio breaks/stops and continue playing randomly when 'Ram Previewing'
It happens mostly when the RAM is fully filled up with image cache files! When the Ram is not filled up totally with image cache files it happens rarely!
Steps to reproduce BUG / issue:
1. create a new composition with a length of for example 5 minutes.
2. create a new solid with size of 50x50 pixel and animate the position of the solid for a very long time so when ram previewing the whole ram/memory gets filled up with different image cache data (this is very important!). Alternatively you could use a long video file to fill up the RAM completely.
3. import a wave file .wav 16bit 48khz uncompressed which is very long for example 5 minutes.
4. insert the wave file in the earlier created composition which contain the animated solid or video file.
5. Set the work area bar (preview range) for the whole composition.
'Ram Preview' the composition until the whole RAM/memory is filled up with image data.
AE has to stop rendering because there is no more space available in RAM.
make sure 'from current time' checkbox is off.
6. listen to the audio which stops playing randomly for about 1-2 seconds and comes back and continues playing (***BUG***)
7. Now set the right handle of the composition work area bar (preview range) to less then the maximum RAM size
(less then the green cache indicator on the right side)
8. "Purge image caches" or "Purge All"
9. Ram preview the now smaller work area
10. listen to the audio. The audio breaks are gone! (***Workaround***)
Additional information:
I have the latest After Effects CS5 update installed (10.0.1.19)
This behavior is tested with different audio drivers inside After Effects CS5 (After Effects WDM Sound, Generic Low Latency ASIO Driver, ASIO DirectX Full Duplex Driver)
I also tried different Sample Sizes Buffers (alternatively to the default 2048 samples) but without success.
Reducing the amount of RAM which After Effects can access didn't solve the problem!
System:
Win7 64bit all latest Updates, 8GB RAM, CPU: intel Core 2 Extreme QX9300, nVidia Quadro FX 2700M, IDT High Definition Audio Driver v6.10.0.6227
There is no driver problem on my system because After Effects CS3 & CS4, Premiere & Soundbooth CS3 CS4 CS5 have no audio problems!
I have lots of other professional audio software like Steinberg Cubase 5.... on the same system and they all work fine.
I also turned off AVG Anitivirus and Windows firewall for testing without success.
AdobeQT32Server.exe, dynamiclinkmanager.exe, PProHeadless.exe, afterfx.exe do not get blocked by firewall they have full permission.
The CS5 Production Premium installation went fine and without errors and antivirus protection was turned off for the installation.
Any help would be nice!
Felix

Yep, I agree with craulmedia....
It's 1 month ago after my initial post and no valuable feedback from Adobe although I filled out the bug report in addition to this post and provide my email for further information.
The only reason for upgrading from CS4 -> CS5 production suite was the use of all my 8GB RAM in AE and now AE can use it but when it's using it the audio have issues.
CS5 is on the market for nearly a year and still have such essential issues... And my fear rises there will be no valuable update fixing these issues but instead Adobe forces me to upgrade later this year to CS6 in hope something change...
I have had support request for different Adobe products in the past including telephone support, web support via Adobe ID... none with success the web support answered my request 3 weeks later with the message they will look into it... time went by and in the end the result was "Yes we know it's a known bug" the bug did not get fixed for that CS version. it even exists in the next major CS release! (talking about EncoreDVD here). Once the web support answered weeks later when I was in holidays and after some days I was not able to respond they closed my case. I reopened the case but never got an answer! Telephone support is nearly waste of time because in 95% of all cases it does not help to reinstall the whole operating system and talking to people who know less about computers in general or Adobe products then my mom - it's a waste of time.
I don't want to blame here anybody for things happend in the past I just want to point out that this time I choose an other support channel (bug report and forum post) but it seems that this support channel is also a waste of time after 1 month with no valueable feedback!
I bumped up this post 2 times and thanks to craulmedia for the third time.
And now here is my fourth time *BUMP*
All I got so far is: "I saw your bug report it's in the queue"
Is it still in the queue? which queue nr. does it have? how long will it take to get any answer? is it reproducible? Is it confirmed as a known bug by Adobe? Is Adobe working on a fix? When will this fix be available? Is the fix provided in form of an update or in the next major release?
OK, I know this is a user to user forum and Adobe people only stop by in their free time and there is no guarantee for any real support.
But it started out so good in the first time...
Last 2 things I want to add here:
1. Why should I provide my email in the bug report? Sure so Adobe can get back to me for further information... but wouldn't it be nice if Adobe would be so kind to give some status report to that given email as a small present for the enthusiastic beta testers ?
2. please Adobe take a look at www.uservoice.com already Autodesk started to move there with 3ds Max.

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Thanks! I definitely did try that first... (trying to find a solution with the headphones). You can't find any info about them online/their website. Regardless though, After Effects will not allow me to play the audio output through any other device except for the Mac Pro tower - even playing it through the LCD Cinema Display won't work.
Thanks for your reply

After effects ram preview video playback issue

Greetings -- I have Mac Pro 2.93 GHz 12 Core with Nvidia Quadro 4000 & 24GB Ram.
During ram preview playback, it seems as though the video isn't refreshing fast enough in the display -- meaning its almost as if I can see the refresh on the top/bottom half of the frame happening separately. It's a bit diffucut to describe, actually. This does not happen with the same clip in Premiere, just AE.
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409.00 MB
Ray-tracing:
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OpenGL
Vendor:
NVIDIA Corporation
Device:
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Version:
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Kenjo wrote:
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I haven't really kept track of what I've installed/uninstalled. But I can't remember anything that would change the way the iPod works. No OS X updates, no iTunes updates, nothing to do with USB, etc.
I updated the iPod to the newest version of its OS (1.1.1) before I had the problem, but that didn't change. When I restored, though, it should have wiped out any traces of the original iPod OS, I think, and just installed the newest one.
One thing that I did do was that when I was restoring it, I didn't do a lot of messing around on the computer. Keeping in mind that it connects via USB, and that it appears that the iPod doesn't reboot like the older iPods when you're done syncing, I reasoned that there must be two-way communication between devices. Since USB performance is susceptible to CPU load, I let it just sit while it was syncing to keep that load down.
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Audio skipping issue...

This is an interesting issue as it's intermittent, but annoying...
Here's what I am doing-
- Rip a few songs from a CD using iTunes to my local HDD (It automatically appears in my local library)
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Has anyone else seen or heard of anything like this?

Kenjo wrote:
May I ask if you have installed/uninstalled ANY software into your computer between having the problem, and now that it's working fine? I'm tending to suspect something like that is causing the problem.
I haven't really kept track of what I've installed/uninstalled. But I can't remember anything that would change the way the iPod works. No OS X updates, no iTunes updates, nothing to do with USB, etc.
I updated the iPod to the newest version of its OS (1.1.1) before I had the problem, but that didn't change. When I restored, though, it should have wiped out any traces of the original iPod OS, I think, and just installed the newest one.
One thing that I did do was that when I was restoring it, I didn't do a lot of messing around on the computer. Keeping in mind that it connects via USB, and that it appears that the iPod doesn't reboot like the older iPods when you're done syncing, I reasoned that there must be two-way communication between devices. Since USB performance is susceptible to CPU load, I let it just sit while it was syncing to keep that load down.
Before I restored, I did get an error where the iPod and iTunes lost contact while they were syncing. But it might also have been a cable that wasn't seated tight enough, too.
charlie

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In the last week, I have noticed the volume auto-adjusting itself which sounds like skipping. I can see the volume bar moving itself up and down as though it's being controlled by someone else, and sometimes it won't allow me to adjust it at all. It's not just iTunes, it's the sound to the whole computer in general. It stopped doing this for a few days, but is back to it's old tricks again.
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It's fine again today.
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Hi all,
I've been having a tough time previewing audio while working in AfterEffects. I'm using Version 10.0.2.4, running on a 2x2.66 GHz 6-Core Intel Xeon Mac Pro with 64 gigs of memory.
I've opened up projects that have never given me any issues in the past and I seem to be experiencing the same issue, over and over again:
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This happens with .aiffs and .wav files.
I've done the usual tricks -- restarting my machine, double checking to make sure there's not an issue with my speaker setup, repairing permissions, checking for updates.
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Sorry for all the questions, but...
What path/hardware does your audio take to be output? Analog from the Mac? Via a third party card like an AJA or Blackmagic device? USB speakers?
Have you specified the audio device in the AE audio hardware preferences? Have you tried outputting to a different device, or removing the device and just using the standard system audio?

Audio Skipping Through Ram Preview

Hi I am currently using After Effects CS6, and I am editing a video. I have added a song, and everytime I try to ram preview the video the audio is very skippy, as in at one part it will play then go away, then play. This problem has not happened until now, any suggestions?

martinrendon
Open Preferences"Cntl + Alt + ; ", Got to Preview and check Audio Preview Duration. It might be the problem.

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.

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Just did a major system upgrade from an iMac to a Mac Pro, and now I'm having an issue with performance...specifically with RAM previews.
When I try to do a RAM preview with audio, it grinds my entire OS to a hault (can't switch apps, or click on much of anything). It eventually clears up enough for me to stop the RAM preview.
So, I'm wondering if maybe my Memory & Multiprocessing settings might be off.
Here are my system specs:
Mac Pro
2 x 2.4GHz 6-Core Intel Xeon (12 cores)
64GB RAM
ATI Radeon HD 5870
AE CS6 (11.0.2.11)
AE is installed on an SSD drive and the scratch disk is an internal HDD.
Here are my AE Memory Settings:
Here's my GPU Info:
Let me know if any other info is needed...

You are reserving far too little RAM for other software.
See this: "Performance tip: Don't starve your software of RAM."
(Also, I recommend going through all of these materials: http://forums.adobe.com/thread/543440 )
Regarding the SSD: Putting your application files on it means that applications load/boot faster. This is fine, but that benefit is just when you first start the application. If you put your cache files on it, then you get the benefit every time that something is read from or written to the cache---i.e., many times per second, for the entire time that you're working. Put your cache files on your SSD. BTW, there's no reason to not put your application files and caches on the same SSD. The reason that you split things across multiple disks is to prevent simultaneous reads and writes to and from a slow disk; the program loading from disk happens at a different time than reading and writing cache files, so there is no potential for conflict and slowdown.

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Hi all-- I have a relatively simple project, just a paint stroke really, with a write-on effect of sorts that I created by keyframing the Stroke Color alpha (not with a behavior). Yet when I RAM preview or render to a QT, the result freezes and skips a few frames somewhere during the video.
It's not a playback issue; I can step by the video frame-by-frame and clearly see it pausing and then skipping forward.
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Zak

MORE CLUES:
Camera Properties/Scale seems to cause it in my situation.
I just started using a technique of Camera scaling to control some of my shots (see http://discussions.apple.com/thread.jspa?threadID=2375595&tstart=15 for excruciating detail)
If I disable the keyframes of my camera Scale, RAM preview works as normal. If I then enable the scale change, RAM preview breaks as described above.
How odd.

RAM Preview Audio Skipping Issue

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