Generally, an 8mm film to DVD transfer will only allow you to watch the DVD or copy the DVD. The video on a 8mm film to DVD is highly compressed. In addition, video on DVD is only 480×720. If you multiple this out, you get 0.34 Megapixels (MP). This means that each frame of video is only 1/3 of a MP.
Digital cameras started out with 1 MP and today are at 10 MP. If you’ve ever looked at a 1 MP digital image you know that is doesn’t look good at all even at a small size like a 3×5 picture.
In order to get a decent picture from film you need to transfer the 8mm film to HD video and bring into a video editor. HD video will be 1440×1080 or a frame size of about 1.5 MP. This is about 6 times better quality than a frame from a 8mm film to DVD transfer. You should be able to get decent 4×6 pictures provided the film frame you choose is clear and in focus.
So, if you are looking to print some pictures of your film, have your 8mm film transferred to HD video. Don’t transfer your 8mm film to DVD unless you just want to be able to view it or make copies of it.