My After Effects CS6 locks up for 3 minutes "Locking Existing Frames" before it even begins to start rendering, every time I need to preview anything - even at the lowest possible quality.
The render goes perfectly normal - it is not the rendering that is the problem - it is the "Locking Existing Frames" process BEFORE rendering that freezes up my computer for 3 minutes, and ruining my life.
I am using Adobe After Effects CS6 on a Mac Book Pro with a 2.9 GHz Core i7 processor (2 cores) and 8 GB of RAM.
Please help me understand what is happening when it is "Locking Existing Frames," and what some solutions could be to reduce the amount of time it takes to do this.
ALSO: I have scoured the Web for hours looking for the answer to this problem, and to this point it has never been solved. If you can solve this issue, Adobe should give you a promotion and $1 million.
3rd party codecs, MPEG source files, disk cache, low available resources, free memory, all could be having an effect on your performance.
How much free memory are you showing? Do you have any 3rd party codecs installed. Did you enable disk cache? What kind of footage are you using? My MBPro runs just fine with 8GB ram for most AE work.
Hi Rick and Greg,
Thanks for the quick responses. Below are all the details to all your questions. Also - just to emphasize again - my rendering goes super awesomely fast. It is not the rendering. It is the "Locking Existing Frames" process before the rendering that is ruining my life.
I am not aware of any third-party codecs in this system. I imported some fonts (ITC Franklin Gothic) and some video files (see below), but I am not aware of any third-party codec installed on this system.
MPEG SOURCE FILES:
If by source files, you're asking about the video files I imported:
Turned off, but still locks up forever before rendering.
ADDITIONAL FUN FACTS:
Here are some additional observations that might help:
This is my job and I can't do efficiently until I solve this problem, so I will be very responsive until we can identify the issue.
Thanks again for all your helpful responses!
GETTING CLOSER TO SOLUTION:
I went back through previous comps, and it stopped the problem whenever I deleted my audio in each comp (I had the audio turned off in each one so that they weren't overlapping, in case anyone think I'm idiot).
So I know the problem has something to do with my audio, and probably its Codec. First I tried using the raw Premiere file. Then I exported an FLV at a 250-something bit rate.
I'm going to play around with that for a bit. Shoot me a response if you know how I can zero in on what I need to change in my audio details.
I now know the problem, but I don't know the solution.
I figured out that the "Locking Existing Frames" issue only happens when I have audio, so I'm assuming I need to know the correct codec to use for my audio.
To figure that out, I need to know:
And just to clarify, the files I've tried to use for my audio include:
I just tried an MPEG2 but I don't think my Mac recognizes the file (it appears as an icon image piece of paper).
How should I export an audio file to use in After Effects on a Mac Pro?
Upon further research, I just found out this problem has persisted since CS4 for which they created an update to the bug, and then it seems it came up at the beginning of CS5 for which they had to create another update.
Is this a bug, and do you have the update for CS6???
P.S. This issue seems to only come up on Macs because the same project on my Windows computer at home works perfectly fine.
I'm having what seems to be the same issue. Like Grizzlar, seemingly anything that I RAM preview that has audio takes longer due to the Locking Existing Frames. The audio I'm using is AIF exported from Apple Logic. I'm on a Mac Pro (early 2009) 2 x 2.26 GHz Xeon w/ 24 GB RAM running 10.8. This happens no matter if Render Multiple Frames is on or off. This happes any time I RAM preview—even if I have full green showing everything is in RAM—I still get the Locking Existing Framesdelay before playing. If I mute the audio layer there is no delay.
Another weird audio issue—I'll post in a separate thread if unrelated: my audio pitch is off (low) in RAM preview. The first playback of the RAM preview is usually wacky (I've seen this before in previous versions of AE) where the audio plays and no video for the first few frames and is indicated as NOT realtime. Like I mentioned I've seen this before in previous versions, but not quite like this: FPS is at 115.224/24 for the first few frames but the audio is the correct pitch. Then the second time through (and all subsequent plays) the video plays realtime (24/24fps) but the audio pitch is now lower. In previous versions I recall the audio was higher (incorrect) pitch for the first play through and lower (correct) pitch on subsequent plays.
A few other notes: I'm not getting the 3 minutes of delay as Grizzla but rather 10 seconds. The comps that I am currently working on are only 100f though.
Also, I'm not getting consistent results with Render Multiple Frames on/off as it pertains to Locking Existing Frames (LEF). On RAM preview, some of my comps are LEF even if already in RAM and others play immediately. I'm looking for variables that might be causing this.
we have dealing with the same issue on various of our Mac. We simply have opted to turn off the audio during preview and rendering to a file to view our movies with audio. I just tried all your suggestions and continue to have the problem. At this point the locking of the frames will happen after about 1 minute,
This mac is a 2x3.06 GHz 6-Core Intel Xeon, 32 GB 1333 MHz DDR3, running mac OS 10.7.5. NVIDIA Quadro 40000 grphics card. Built in Audio Intel High Definition Audio.
If anyone find an answer to this it would be osom!!!! thanks.
I would make sure to avoid MPEG-based codecs (FLV, H.264, MP4, MKV, M4V, MPEG-2 and MPEG-4) as these are delivery codecs that prioritize file size rather than quality and frame-reading speed. On many such codecs the audio is "muxed" into the video stream, causing AE to try to demux the entire audio duration before playing.
Good production codecs, you ask? Avid DNxHD, Apple ProRes, QT Animation, QT Cineform, QT PNG. All can be set to use minimal or no lossy compression.
For audio, either embed it in a production codec or use WAV or AIFF, never MP3 or another delivery audio codec.
Here is the immediate solution:
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