28,000 frames is not normal. You should be aiming for 0 dropped frames.
The main reason for having dropped frames is because your hard drive cannot keep up with the video while you're transferring it from your camera.
Some things to try:
1. Defragment your hard disk
2. Capture your video to a dedicated hard disk (a hard disk that does not contain your operating system and program files)
3. While capturing - don't use your computer. Turn off your virus protection, stop using the internet, close down all unnecessary programs (especially if you only have 1 hard disk)
You should be exporting (also known as rendering) your video to the MPEG-2 format. That is the format the DVDs use. You will need to specify a bitrate for your video depending on how long your concert is. Check out this link for a bitrate calculator:
http://dvd-hq.info/Calculator.html
After you have encoded your video to MPG and exported your audio to .mp2, .ac3 or .wav, you will need to use an "authoring" program to create your menus, chapter points and create the DVD structure. Sony makes an authoring package called DVD Architect. Other examples include DVD-Lab (
http://www.mediachance.com) and TMPGEnc DVD Author (
http://tmpgenc.pegasys-inc.com/en/product/tda20.html)