Vcd burning with Nero -HELP please

Could someone please help me. I am new to converting and burning. I am using Nero burning software. I am trying to make a vcd with files from the internet. I open the program and then drag the .asf .mpeg .avi files to the left pane. The program then says it is encoding files and then it burns them to cd. When I play the cd on my home dvd player, I can see the images, but there is fallout, ie gaps in the film. Also, the audio is not in sync with the video. Overall, the audio and video is not complete and a very patchy. When I view the original downloaded files on the pc, they are perfect.
Help please.

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