Dan,
The total sum of videos duration that you can get depends on several attributes, such as:
- Source files that you are converting: the compression used, quality, video contents
- Output options: Type of compression, video size and the quality that you are converting to.
I did a small test and converted a 5-minute chapter of a DVD using medium quality, 320x240, with MPEG4 video compression, and the resulting file was about 22.5 Megabytes.
If you convert similar videos, you should get around 29.5 hours of video at a size of 8 Gigabytes.
If you decrease the quality or size, you should get more than that, of course.
You maybe able to fit 20-23 movies on a total size of 16GB at 700-800 MB a movie, but of course this is just an estimate. The actual number depends, as I told you earlier, on many factors.
I tried a movie that is around 2 hours. I converted it to both AVI and WMV (with the same settings above). The resulting AVI file was 409 MB and the AVI file was 280. This means if your movies are similar to mine, you could have between 35 and 55 movies in your 16 Gigabytes of storage.
The M²Convert ZEN is optimized to convert files to ZEN compatible formats.
Whether to choose better quality over smaller video size, or vice versa, is a matter of personal preference. I suggest the you try converting one chapter of a DVD and choosing different options for converting and deciding the best options for your videos.
About the two error that you are facing:
1- What is the version and build number of your M²Convert application? You can get the build number by opening your program and then right-click on the title-bar at the very top of your window. Select "About M²Convert..." and the version and build number should be at the top of the new window that appears.
2- Is this problem specific to some DVDs or all of them?
3- Are you able to play the source DVD correctly in Windows Media Player on the same PC? I'm asking this because our M²Convert applications use the same decoding technology that WMP uses to play back videos.
4- What windows operating system (XP, Vista, etc.) do you have?
About the answers to the question that you asked me:
1) The version number that you have is not valid for M²Convert ZEN, are you evaluating M²Convert ZEN or M²Convert Pro?
2) ZEN devices support WMV format, why are you trying to convert these files? Also, where did you get the WMV file that you are trying to convert? Did you download it from a website?