ialvi

I am new to Videopad (purchased a month ago.) I created a new project and added a 9 GB video file (AVI) to it. When I drop the file onto the editing pane, I only see about 5 min of video and audio (the file is about 1 hour long.) The rest of the clips are blank with no video or audio. I tried a different file, but it met the same fate. What am I doing wrong? Any help will be greatly appreciated.