Thanks for your response, I was wrong on the build. Actually I have build 770. Any other thoughts?

Are you making a Bluray or DVD? Are you seeing this lag during preview or after creating the Bluray/DVD?

Bluray - no, it doesn't show in the preview. In Vegas, everything is in sync.

I actually meant the preview in DVDA. But I assume from your response that you are seeing the sync problem in your finished bluray?

Correct, it's in sync perfectly in Vegas, but not DVDA. When I preview the project in DVDA it's out of sync. I tried to burn a Bluray directly from SV12, but that was out of sync as well.

Here's my take on this, and an approach I've used in the past.

Please Test-burn a DVD on an RW, remove from your PC and play on a STB DVD player to confirm issue. If this is good then we need to look back at your PC at Preview for sync issues. If the sync issues remains then we need to look at why your work "appears " to be in sync. One thing to implement is to IMPORT the RW DVD and analyse this on your PC in Vegas. We need more evidence based results.

I did a test burn, it was out of sync too. I did a test burn of the project in Vegas Pro 12 too, where everything appears to be in sync. I got the same result that I got when burning in DVDA, audio and video start in sync, but 3-4 minutes into each chapter, they are out of sync.

What sample rate did you use for the audio when you rendered. I haven't checked whether DVDArchitect will accept a 44.1k file without rendering it again but that would slow down as audio for video should be 48k. I mean the audio will be ahead of the video.

Can you post Medianfo information about your rendered files as well as original files and project and render settings?

ronald-e, the audio sample rate was 48KHz

david-tu, not sure what you mean by Medianfo. the video files I rendered as a m2v, the audio as AC3.

https://www.vegascreativesoftware.info/us/forum/faq-how-to-post-mediainfo-and-file-properties--104561/

Is this what you're looking for, david-tu?

Yeah, and under the audio it says the audio is running at 31.250 fps. I don't know why that is, but that is very strange. I have never seen that before.

Also, I assume the first is your source material. What did you record this with? It says it is progressive, top field first at 60fps. You normally don't have a field order when it is progressive. It is also at 720p, so if this is your source I would render to 720p for your bluray. But that probably isn't the sync problem, but is is strange.

Nicely requested David. I'll stick my neck and say that, right there, is your culprit.

Do try adjusting the framerate and see if you can affect the outcome. If you can, then that should make you further confident. Now, the reasons why the MPEG2 Video stream, or then the Audio AC3 stream ain't wanting to have synced numbers, we could investigate further.

Interesting.

Did the audio actually come from the camera or a separate recorder ? If that was a VFR recorder it may play well in Vegas but not convert well. Just a thought. If you convert the audio in Sound Forge to a wav file then convert to ac3 is it different ? I did a quick search and this issue of 31.25 fps comes up many times. I haven't done a full search for results just quick to see if the number turns up and it does.

Well done Ronald! That's gotta be the nub of this issue.

I captured this from television. What is normal for the audio? Is 31.250 high or low, and is there anyway to manually adjust it?

The audio should be running at the same rate as the video. In this case, if this reporting is true, it is running faster than the video. Your video is running at 29.97fps. What device did you use to record from the TV?

I used an Avermedia capture card, connected via HDMI.

What did you use to capture it from the TV? I expect the recorder recorded in VFR audio. If you have Sound Forge as well as Vegas then you can render to a WAV file and then bring that back into Vegas as your audio. It should then reset the frame rate correctly. Use the original file not the one from Vegas. Depending on the version of Sound Forge you have it will take the full video + audio file. Audio frame rate should be the same as the video frame rate otherwise they will not be in sync. So for 60P it should be 60P ( really 59.94fps to be correct ) for interlaced 59.94 fields per sec and timecode is 29.97fps . People get confused but image sample rate is the same for interlace 60i as progressive 60P. The temporal motion is the same smooth look of CRT TV. The timecode is the same as the interlace sync pulse that is the start of a 2 field sequence so that down stream equipment such as mixer or even CRT's know which field is the start or 29.97fps. Confusing I know and definitely not the same as 30P which unfortunately has the same timecode !!!

In case ronald-e is not clear. I believe he is saying that the audio may be recorded at a variable frame rate (VFR).

I used a DVR to record the program, then captured it from the DVR onto my computer. Can I use Windows Movie Maker instead of Sound Forge? My version of Sound Forge is probably 8-10 years old.