Sound and video out of sync

Olz · Post by **Olz** » Mon Sep 08, 2008 2:16 am

Hi

I've been reading around the forum but couldn't find an answer, so here goes:

To start with I there was no sound when I previewed my videos. The edited and compiled movies did have sound. I uninstalled a codec pack, and upgraded my Direct X. Don't know which one of those actions solved my sound problem, but now it works. The problem is that now the sound and video is out of sync. Anyone knows how to solve this?

// Edit

I know my system is kind of low-end for editing AVCHD files, but i use the smartproxy function, and it actually works fine. I don't need to do heavy editing since i only bought the camera to do "happy-snapshots" of my daughter and other family stuff.

Post by **Ron P.** » Mon Sep 08, 2008 2:23 am

Welcome to the forums,

OOS (out of sync) problems are most often related to MPEG video files. Are you attempting to edit MPEG-2 video files? Is the OOS evident immediately or does it gradually get out of sync?

Some members that edit MPEG-2 quite often have resorted to using a third party program called [Womble. It is specially designed for MPEG video files.

Next is the OOS present while playing video clips in the timeline, or just after burning a DVD?

BTW, nice photography work...

Olz · Post by **Olz** » Mon Sep 08, 2008 2:26 am

Hi Vidoman. Thanks for helping out!

I haven't been burning a DVD yet. The OOS problem is in the capture and edit panes - right after I imported the video clips from the camera. I'm a bit confused ambout the formats. Is AVCHD a sort of MPEG-2? My camera is the Canon Vixia HF10.

>photography
Thanks!

Post by **Ken Berry** » Mon Sep 08, 2008 2:45 am

The AVCHD files you capture are in fact mpeg-4 files, and as you rightly surmise, your computer is way underpowered to do anything with AVCHD in its native format. And I am afraid that goes for even using SmartProxy properly. The minimum requirement for SmartProxy to work correctly is P4 3.0 GHz with hyperthreading or one of the old dual core Intels. Yours is way below that threshold, I am afraid. Even those will have difficulty even playing the AVCHD smoothly.

What SmartProxy does is create temporary mpeg-2 files from the high definition mpeg-4 files. But these are temporary proxy files, and when the editing is finished, the edits are applied to the original AVCHD clips. Being temporary, and your computer being what it is, I am afraid I am not really surprised it is getting the audio and video out of sync in the proxy files.

If you are intending eventually to burn a standard definition DVD, I would simply put each captured AVCHD file in the timeline, and go immediately to Share > Create Video file > DVD. This will convert the AVCHD to DVD-compatible mpeg-2, but in a real, not temporary or virtual file. I think your computer might be able to do that, but don't hold me to it.

To stand on my soapbox, I get very annoyed with all the hype from the camera manufacturers about how wonderful AVCHD is. And they are right. But they should also be informing buyers that they will require a big, shiny new and powerful computer to be able to do anything with the video!

Post by **Ron P.** » Mon Sep 08, 2008 2:52 am

But they should also be informing buyers that they will require a big, shiny new and powerful computer to be able to do anything with the video!

Kinda like trying to use a pick-up truck to tow a semi-trailer loaded with a large quarry dump truck. It may be able to do it, but don't be surprised if it doesn't.