Audio rendering issue at DVinfo.net

Howard Churgin · August 15th, 2009, 03:30 PM

I have a short movie that when rendered out in both Ppro cs3 or After Effects Cs3 the audio lags behind fractions of a second compared to when played in the program. This is important because there are things happening on a beat and when rendered out it becomes a fraction of a second off beat. Are there some kind of settings I am missing. what is "Interleave" ?
I see this in only some of the export settings.

David Merrill · August 15th, 2009, 06:55 PM

What is the source file type?
Does it remain a consistent amount out of sync or get progressively worse?
What rate was the original audio recorded in; 32, 41, 48 Khtz?

Bryan Sellars · August 16th, 2009, 12:03 AM

Quote:

Originally Posted by Howard Churgin

I have a short movie that when rendered out in both Ppro cs3 or After Effects Cs3 the audio lags behind fractions of a second compared to when played in the program. This is important because there are things happening on a beat and when rendered out it becomes a fraction of a second off beat. Are there some kind of settings I am missing. what is "Interleave" ?
I see this in only some of the export settings.

I haven't used your programs but have seen the fault in Elements 7 on 2 different computers using DVD mpeg2 PAL. in the end the program was ditched and they now use Corel ProX2 with no problems, when I used Premiere 4.2 and later 6.1 I always set the interleave to 1 frame, if I left it at the default it caused a lock up of the video after about 5 mins, with the interleave set so each frame of video had it's own piece of audio integrated into it I never had any further problems. I also switched of audio re-compression, don't know if any of these options are available to you but might be worth checking.

Harm Millaard · August 16th, 2009, 02:21 AM

Quote:

Originally Posted by Howard Churgin

I have a short movie that when rendered out in both Ppro cs3 or After Effects Cs3 the audio lags behind fractions of a second compared to when played in the program. This is important because there are things happening on a beat and when rendered out it becomes a fraction of a second off beat. Are there some kind of settings I am missing. what is "Interleave" ?
I see this in only some of the export settings.

PAL country, right?

So define 'fractions of a second'. Is that 1 frame? How did you establish the lagging? On a set top box with a HTC connected? Is the delay properly adjusted?

Interleave has nothing to to with this, it is about the video part and how each field is composed.

Howard Churgin · August 16th, 2009, 06:17 AM

NTSC...
They delay is about 1-2 frames. It sounds small but it is the difference of the horses feet hitting the ground over a jump on the beat.

If I render out of Ppro with QT animation and play it in after effects all is good. If I render out of PPro to another QT compression (ie photo jpeg, H. 264) it happens. Same thing when I export out of After effects.

Harm Millaard · August 16th, 2009, 03:31 PM

Howard,

If you are on a MAC, I have not suggestion, but if you are on a PC, use another codec than QT. QuickTime has been known to cause all kinds of problems on PC's and therefore is usually called QuiRckTime.

Howard Churgin · August 17th, 2009, 04:32 AM

I am on PC. Can you recommend a codec that is lossless but not as big as uncompressed DV?

For intial playback on computer to test out effects and final renders I have always used QT Photjpeg w/ no problems but this is the first time I have such critical cuts to the music. I did try DV .avi last night and it was fine however the file size was more than twice that of QT photo jpeg with very little quality difference.

Harm Millaard · August 17th, 2009, 06:50 AM

I would try Lagarith or HuffYuv. Both are visually lossless, but not as hungry for disk space as uncompressed.

August 15th, 2009, 03:30 PM	#1
Howard Churgin Regular Crew Join Date: Nov 2008 Location: Marlboro, NJ Posts: 85	Audio rendering issue I have a short movie that when rendered out in both Ppro cs3 or After Effects Cs3 the audio lags behind fractions of a second compared to when played in the program. This is important because there are things happening on a beat and when rendered out it becomes a fraction of a second off beat. Are there some kind of settings I am missing. what is "Interleave" ? I see this in only some of the export settings.

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August 15th, 2009, 06:55 PM	#2
David Merrill Regular Crew Join Date: Jul 2009 Location: Los Angeles, Ca. Posts: 91	What is the source file type? Does it remain a consistent amount out of sync or get progressively worse? What rate was the original audio recorded in; 32, 41, 48 Khtz?

August 16th, 2009, 06:17 AM	#5
Howard Churgin Regular Crew Join Date: Nov 2008 Location: Marlboro, NJ Posts: 85	NTSC... They delay is about 1-2 frames. It sounds small but it is the difference of the horses feet hitting the ground over a jump on the beat. If I render out of Ppro with QT animation and play it in after effects all is good. If I render out of PPro to another QT compression (ie photo jpeg, H. 264) it happens. Same thing when I export out of After effects.

August 16th, 2009, 03:31 PM	#6
Harm Millaard Trustee Join Date: Aug 2006 Location: Rotterdam, Netherlands Posts: 1,832	Howard, If you are on a MAC, I have not suggestion, but if you are on a PC, use another codec than QT. QuickTime has been known to cause all kinds of problems on PC's and therefore is usually called QuiRckTime.

August 17th, 2009, 04:32 AM	#7
Howard Churgin Regular Crew Join Date: Nov 2008 Location: Marlboro, NJ Posts: 85	I am on PC. Can you recommend a codec that is lossless but not as big as uncompressed DV? For intial playback on computer to test out effects and final renders I have always used QT Photjpeg w/ no problems but this is the first time I have such critical cuts to the music. I did try DV .avi last night and it was fine however the file size was more than twice that of QT photo jpeg with very little quality difference.

August 17th, 2009, 06:50 AM	#8
Harm Millaard Trustee Join Date: Aug 2006 Location: Rotterdam, Netherlands Posts: 1,832	I would try Lagarith or HuffYuv. Both are visually lossless, but not as hungry for disk space as uncompressed.