At "select file format" I clicked on "H264".
At "File extension chose "MP4".
At "Profile name/Quality chose MPEG-4 640 x 480/30 (6Mbps)
At Video format chose NTSC
At top center of edit screen is "VIDEOFILE01" my choice of file name.
At bottom left of edit screen I clicked on "Start" button.
Preview section now much larger than during the editing and the word "PRODUCING" shows at bottom of Preview.
When Producing was finished it showed a completed length of 33 minutes.
QUESTION # 1 - Total length of this short video was 17 minutes at completion of editing. If the
remaining length of 16 minutes is unused frames, can I delete them?
Then came the problem. My pc screen now shows a symbol for the completed file.
When I click on the symbol, the following error message appears:
"We can't open VIDEOFILE01. This may be because the file type is unsupported, the file extension is incorrect, or
the file is corrupted".
QUESTION #2) I did a re-test of all the steps above. Same result and same error message.