We have seen performance problems when trying to use the record camera feature, particularly with HD camera dimensions. This happens because the Camtasia Recorder is trying to capture, compress, and save 2 videos, the screen, and the camera, all in real-time. This load exceeds the capabilities of some PCs, and the first thing to break is usually the audio/video sync on the camera video.
We are working to improve the performance of the Record Camera feature, in order to solve the sync problems we've seen. This is not a simple fix, and it will take some time to improve this area of the product. In the meantime, here are the known workarounds:
1. Don't use the Record Camera feature. Instead, use a hardware camera (or smartphone) that saves to a format that Camtasia Studio supports, such as MP4 (preferred), WMV, or MOV. Copy the camera video to your PC, then use the Import Media... button to bring the camera video into your project. The advantage of this approach is that it let's the hardware camera handle the audio/video sync. It also gives you the option of recording audio from 2 sources (camera, Camtasia Recorder). After both the screen video and camera video are on the timeline, you can choose which audio sounds better and delete the other.
2. Use the Record Camera feature, but change the capture dimensions using the Format settings button in the Recorder Tools > Options dialog, as shown here
. The advantage of this approach is that it keeps the screen and camera recording together in the same CAMREC recording file. But the reduced camera dimensions do sacrifice quality of the camera recording. Depending on the size of the camera video in your canvas, this may or may not be acceptable. If you need better quality, the other approach may be a better option.
I apologize for the trouble this issue has caused. I hope this info helps those who are experiencing sync issues when recording with camera video.