Audio seems to be ahead of video after export.  I welcome suggestions on how to avoid or fix.

What created the video?

not sure of your question.  I used export in Pinnacle Studio 24 ultimate with these settings. Am I giving the info you need?

I used export from pinnacle studio 24 ultimate, and chose quicktime format. 

encoding H264 

audio sample rate 48 kHz

sample size 16 bit

bitrate 112 

Do you need more info?

What's the SOURCE video on the timeline?

PDS:

not sure of your question.  I used export in Pinnacle Studio 24 ultimate with these settings. Am I giving the info you need?

Your post has been caught by the forum software because of the way you tried to insert a picture. I had to edit the HTML code of your message then had to approve it so it got published.Here is how to post an image : http://forums.pinnaclesys.com/forums/thread/326384.aspx 

One of the most common reasons of OOS export is because the source video - the video you are using to MAKE the move with, is of a variable frame rate or has dropped frames. The export settings are normally irrelevant.

encoding H264 

 quicktime movie

I don't seem to be able to send a screen clip of my settings. 

PDS:

I don't seem to be able to send a screen clip of my settings. 

Follow these steps : http://forums.pinnaclesys.com/forums/thread/326384.aspx 

thanks. (sorry for the confusion and flurry of attempted responses)  most of the project is video shot on an iphone 10Xmax.  I also used stills shot on the same iphone, and some stills and video shot on a Mavic II pro drone.  

I used Pinnacle to lengthen the duration of a vey short video early in the project, in case that is relevant. 

Do you have guidance on how to avoid or more importantly at this point - fix - the issue?

First, I would use MEDIAINFO, which is free to see if your video is variable frame rate (I bet it is),  and what is the min and max of that frame rate.

Video editors are frame accurate and work that way.

Install MediaInfo, run it, and drag your clip to it. At the top, click on View>Text and copy the text and paste it in a post.

As for lengthening a clip, is it a video clip or still image. Lengthening a video clip will only create a still image of the last frame. 

The "fix"? Use a camera that records in constant frame rate, DSLR/Mirrorless/Camcorder.

I now see that iphones all record in variable frame rate.  I will consider switching how I record, but I want to complete the project shot on an iphone.  

 Any suggestions for fixing the issue?

 I'm guessing the timing discrepancy might add up over the length of the project and so am going to try creating movies of parts, and then combining them. 

You can try converting the videos to constant frame rate with HANDBRAKE, which is also free.

In the Video tab, change to constant and whatever frame rate you recorded at. 

thanks so much for your help/

What do I need to convert to constant framerate with handbreak?  each of the video files that are included in my project?  Does that mean I need to redo all the editting I did on those files - choosing segment/pan and zoom/color corrections/audio levels/ etc? 

 hopefully there is a way to fix my project without recreating it.  

A good question! You would have to convert all your cell phone to constant frame rate.Handbrake has a batch feature where you can do that. Save the files in a different location. I do not know the file extension (.mov, mp4, etc) that you have on your original files. If MP4, then save the Handbrake files as MP4.

As for the files in your project, what I would do, before opening Pinnacle, is rename that folder to something else that you would remember. Just add to the name of the file _ORIGINAL. Then name the converted files to the same name as your original folder.

Start your project and it "should" work. 

Thanks Tony for that advise. Sometimes I do it in this way, if I need a postprocessing of one or more clips after I did my project cutting in Pinnacle studio.
My experience is, that sometimes additional steps are necessary or conditions to consider:

- I work in that way: I import the food into the library, but the video clips and the still pictures remain physically within the file structure

- the replacement of extern postprocessed and reworked clips works only if the file type (mpg, avi, mp4, mov, ...) is the same than the original clip. The most external programs do not support all types and you need more than one programm for that (including handbrake)

- in some of my cases it was not sufficient to replace only the clip in the file system. I had to delete it in the PS library and do a new import. In some other cases I had to rename the clips, because PS holds some information even if the clip was deleted and inserted again with the same filename. I did not know, how to refresh the cached information only for single clips.

I am reluctant to try to convert the original video to constant framerate with handbrake and swap the name of the output to match the originals because of how much work it would be, and because I don't think it will work based on something similar I tried.  Also, I think it would destroy my current project. 

I use a number of subprojects and exported those, converted them to constant frame rate with Handbrake, and swapped in these clips for the original subproject media. when I first did this, I neglected to click the "constant frame rate" setting in handbrake, so I had to rerun them all.  I then tried your trick of swapping to the original name (which I have used in unrelated document management software). It didn't work in Pinnacle.  Pinnacle recognized that the files had been moved and it required re-linking to them.  And the result did not prevent the audio from drifting out of synch over time. 

I  then ran the entire exported video through handbrake to convert to constant framerate and imported the output from handbrake into Pinnacle, separated the audio track, manually resynched several times and exported again.  The audio in that file also drifts out of synch over time. .  

 Any other ideas? Doing some web searching I see that lots of people have had problems keeping audio in synch, but I'm not finding a solution. 

thanks.  Do you know of a solution to fixing a project with variable frame rate video after it is complete without converting the inputs and redoing it?   

Update:  I am happy to report that after I reinstalled  Pinnacle 24, I was able to export my project without the major audio synch issue that I had previously.  This was the case whether I used (i) video that I created with my iphone X (but see note below), (ii) video that I had exported from Pinnacle subprojects (based on the iphone videos) and changed to 30 fps constant frame rate with Handbreak, or (iii) video that I had exported from Pinnacle subprojects (based on the iphone videos) without modification in Handbreak (These videos were in 29.97 fps constant frame rate).

In my final discussion with technical support yesterday I was finally told that the audio synch problem I was having was a known issue, and that it had been fixed with a patch and that I needed to do a clean installation of Pinnacle to obtain the patch.

I am surprised that I the patch and updated software was not available as an update through Pinnacle 24.

I was also told that the Pinnacle is not compatible  with the codec used in iphones to make videos. Others have told me that Pinnacle doesn’t handle variable frame rate video well, and that I need  to either change the setting in my iphone to turn off minimizing file size, or use Handbreak to convert to constant frame rate. Corel’s knowledge base that may be relevant but I don’t know enough about what codecs iphones use to use this advice.

https://support.corel.com/hc/en-us/articles/215911948-QuickTime-MOV-video-files-support-with-Studio

My experience is that with the patch, Pinnacle is handling iPhone videos appropriately, even when they are not recorded with constant frame rate.  The one possible exception I’ve had is that Pinnacle badly botched the rendering of videos in one of my exports from a movie with iPhone videos.  However, when I later exported separately from the subproject using these videos, the exported file properly rendered the videos, so I suspect that the prior flawed export was not related to the use of iPhone videos, but was caused by something else – perhaps not giving Pinnacle enough time to render in advance, or a setting in how the video was saved.  I would very much like to learn about how to avoid these problems.

I would like to understand what devices and setting I can use to make reasonably high quality videos and movies while minimizing the types of issues I have been having, which include, besides the audio out of synch issue, occasional incorrect rendering and occasional static introduced in the sound track that was not in the media used to make the movie.

Thanks for any help.

I'm glad you've found a solution  I had "the same thing" happen on P23 ultimate.  Video/audio were synced in editor preview, but badly out of whack near the end of the exported mp4 (~20 mins).  At the beginning was fine. BTW, I don't mean a bit of lag between audio and video, but audio from at least outside of the timeline window of the current clip, if not another clip altogether.  Also, I happen to have a couple of audio tracks, and the flow between them breaks as well (ie, a piece of audio not playing when it should, and coming up many seconds later.)

Edit: I should add, it's not a gradual slip either.  It appears to be perfectly fine for a while, and goes off the rail later on when things get a bit more complex (multi video and audio tracks, time remapping, etc.) 

Source video is from a Sony action camera (fixed frame rate, 59.94fps) and a samsung cell phone (fixed frame rate, 30fps).   Export is 29.97fps.

Once I tried mark-in export of the last half of the video, the sync was fine.  So I exported the first half, then the second half, and glued them together with a 3rd party tool.  Horrible, brute-force workaround, but it did the trick.

(I've tried other hacks - restart Studio before export (I've needed that for other problems in the past), re-render the whole project, etc., but nothing has been able to fix / workaround the sync problem except for exporting in chunks.)  

Now it's happened again, on another project that I'm regenerating on P23, where there were no problems on P22.  So I suspect that this was a bug injected in P23.  I've had to resort to the mark-in/mark-out exports + gluing again to get around the problem.

I'm up to date on P23 levels, but I may try uninstall / reinstall, since that seemed to help you.  But TBH I'm not optimistic.

If you run into this again (hopefully not) and if it has a similar symptom (sync is ok at start, and appears / develops during the course of the video) you might want to try just exporting the problematic area, and see if that avoids the problem.

Good luck! 

 ps - you mention occasional weird static - I've had that happen to, related to clips where I do time remapping as part of a large project.  I could write another wholeseparate post on struggles with time remapping, but I've found the only sure-fire way around issues there is to export just the remapped clip at the speed & settings I want, and then re-import the result, and replace the on-the-fly time remapping with the exported clip.  Renders faster (especially if the TR was speeding up a bunch of video), and seems to avoid most of the glitches I've run into when I'm using TR in a large project.