Sync Issues with Source Image to Video

[ldavis9000aws]

I have a source video which I created with an older Logitech webcam, but it was recorded in .wmv format. I converted the wmv file to mp4, then checked to ensure the audio and video were in sync throughout the entire file. From there, I chose a source image and used the converted video as the driving video. However, about 8 - 10 seconds into the video (it's a little over 2 minutes in length), the audio gets out of sync with the video in both the "concant" and final video. When I uploaded the video, it was NOT out of sync and when I compare the original to the concat version. Has anyone else encountered a similar issue and found a resolution?