Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to merge avi files [title] Download virtualdub from the sourceforge website and install it on your computer. [title] Open a video file in virtualdub by running the software and then clicking on " open " from the file menu. [title] Browse to the first avi movie clip that you want to add and click " open.

Ending1: [step] " [title] Copy the file after editing and adding graphics until the video file is in the winamp program. [title] If the video file is already in the winamp program, skip to step 4 or 3. Ending2: [title] Click " stop " to confirm that you want to show this video in source mode. [title] Wait for the video to be added to source mode. Ending3: [step] " you have just added the first avi file that you want to merge in virtualdub. [title] Drag the timeline slider to the end of the first clip. Ending4: [step] " [title] Select avi videos file folder and click " video " to install that file file into window. [title] Use the command prompt on virtualdub to transfer files to your computer.

Answer format: ending1/ending2/ending3/ending4