Audio sync delay

GrampyPeter

Newbie Joined: Apr 07, 2011 00:55 Messages: 20 Offline

Solved by

Jun 29, 2014 02:49

I'm using PD10, HP DV-7, intel i7, 8GB ram.
My video runs along ok when I view the file.

However, when I "Produced" the file as an MP4 and view that file, the music ends about 4 slides short of where it should end. The next piece of music starts again correctly in sync with the slide it is supposed to start with. I used Windows Task Manager to observe my CPU performance. It pegs at nearly 100% usage whenever a slide is displayed that has been edited with "Fix/Enhance" (to adjust colors)." (See attachment.) In an area where there is little slide editing the music stays in sync pretty well with the slides.

Why does the CPU usage peg when it processes a slide that has been edited.? I suspect this is causing a slight delay in the music during "Produce" that is cumulatively significant in the MP4 file.

Filename	DxDiag 2.txt	Download
Description	current dxdiag
Filesize	31 Kbytes
Downloaded:	335 time(s)

Filename	CPU usage.doc	Download
Description	CPU usage during an edited photo slide
Filesize	252 Kbytes
Downloaded:	242 time(s)

borgus1

Senior Contributor Joined: Feb 27, 2013 00:33 Messages: 1318 Offline

Jun 29, 2014 10:36

Is the music in Mp3 format? Try first converting it to WAV, then produce, and see if the result is any better.

stevek

Senior Contributor Location: Houston, Texas USA Joined: Jan 25, 2011 12:18 Messages: 4663 Offline

Jun 29, 2014 10:49

I don't think that converting to wav would help.

Update your video driver directly from ATI; not Windows nor HP. If there is nothing newer, disable hardware acceleration.

Clear out some space on your hard drive(s). Delete trial programs and old prograsm you no longer use or need. DEFRAG the disk type hard drive. Something like the free CCleaner is helpful but don't use the registry cleaner.
Here are some other useful tools:
http://download.cnet.com/best-windows-utilities-apps/?tag=rb_content;main

Use msconfig to disable the programs that you don't need at boot. If you don;t know which is safe to disable, there are some free programs available to help for example Soluto..

Turn off the Internet !. Set your antivirus to NOT scan everything being written to you hard drive (since it has already been scanned).

This message was edited 1 time. Last update was at Jun 29. 2014 10:51

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BoilerPlate: To posters who ask for help -- it is nice to thank the volunteers who try to answer your questions !
Anything I post unless stated with a reference is my personal opinion.

GrampyPeter

Newbie Joined: Apr 07, 2011 00:55 Messages: 20 Offline

Jun 29, 2014 23:57

Borgus1 was right on. Changing from mp3 to wav fixed that problem.

Stevek, I read some warnings about not using oem drivers because sometimes pc manufacturers write their own custom driver code that would be lost by updating to OEM drivers.

I've cleaned out most bloatware, probably not all, but a lot. I use a tool called Winderstat to see what big files exist that I might have lost track of. I find it useful...and it's pretty colorful too.

I use msconfig frequently to keep background stuff from sneaking in.

I also turned off the internet the last time I did the "Produce" function in PD. Not sure it contributed to my problem, but it's a good step to take as a precaution.

I was surprised the the CPU usage during rendering is 90-100%. Guess if has nothing else to do it might as well do something constructive

Guess I'm okay for now on the delays. Thanks for the help guys. Nice of you to be willing to lend a hand to those of us who need it now and then. Peter

stevek

Senior Contributor Location: Houston, Texas USA Joined: Jan 25, 2011 12:18 Messages: 4663 Offline

Jun 30, 2014 07:40

I apologize to borgus 1 ! .
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BoilerPlate: To posters who ask for help -- it is nice to thank the volunteers who try to answer your questions !
Anything I post unless stated with a reference is my personal opinion.