VMS11 Audio Drops Out After 80% Of A Rendered Vid

O1guin wrote on 9/13/2014, 12:05 AM

Hi guys,

I think I'm having the same issue as this gentleman (http://www.sonycreativesoftware.com/Forums/ShowMessage.asp?Forum=12&MessageID=842070); the audio of my file starts to come and go around the 35th minute of a 43 minute video, and the silent parts are more and more frequent until the video stays silent ~38min.

At first I thought I might just have a bad AAC codec, but I have since rendered the footage as an MPEG2 with a different audio codec and the results were the same. I also tried rendering it as an MP4 without the video, and the audio still drops out at about the same places. The audio is fine in Vegas, and it doesn't give me any errors during the rendering process, but the resulting videos always have this issue. Also, though the audio starts to drop out at roughly the same place in each one, it's not *exactly* the same places so I don't think it's an editing issue on my part. Any ideas?

I'm currently running Windows 7 (64bit), I've got an AMD Phenom II X3 720 BE 2.8GHz processor, 4GB of RAM, and an ATi Radeon HD 5870.

Sample of my video can be found here, sound is pretty fine right up to 35:30:

Comments

Ivan Lietaert wrote on 9/13/2014, 6:47 AM

Very weird indeed; not something I have seen before. The only issue I had in the past was sound falling away during editing. It was resolved by playing around with the audio buffers (under preferences, tab audio device, by making the buffers larger). Perhaps this will help for you too, but i'm not sure.

O1guin wrote on 9/13/2014, 9:48 PM

I tried playing with the buffer, both disabling it and increasing it to the max that the slide will allow, but neither one helped in the rendered file.

O1guin wrote on 9/15/2014, 12:00 AM

As I continue to try different things (reinstalled Vegas, reinstalled codecs, rendered uncompressed PCM, and so on), nothing has really worked yet. I may have a workaround--experimenting with audio only rendering worked when I rendered the 42 minute video into two halves. Is there any reason why the audio might consistently fail after ~35 minutes, but the same audio tracks would render correctly as long as they were under that time limit?

D7K wrote on 9/15/2014, 10:07 AM

CPU heat. rest your cpu with new grease, vacuum out the dust, and check your CPU cooler (lots of free ware to check heat).

O1guin wrote on 9/16/2014, 8:52 AM

I tried rendering it as GPU only and it didn't help the problem. However, I've experienced heat issues with my PC a couple years ago, so it's probably due for another cleaning. I'll give that a try, thank you!

O1guin wrote on 10/25/2014, 6:43 PM

I know it's been a month. We had worked around the problem by simply reducing the 45 minute movie of 18 holes to a front 9 and back 9 that came in before the issue started happening.

Couple updates, though:

After finishing that round, I noticed the same issue occurring with footage of another round, and this time it happened *in* Vegas, not just in the rendering. I watched unedited footage in the project timeline from beginning to end, and the audio similarly dropped out after ~40 minutes.

Today, I finally dusted the inside of my computer case, and I was able to render a 75 minute audio file with no problems. I think your suggestion of too much heat was 100% correct!

TL;DR for future people suffering this problem: Clean your case.