You do need the program Virtualdub, a video file and some sort of audio file. Now start Virtualdub and either open the video using the File > Open Video File dialog or drag and drop it into the program interface. The video can be played right away in the software. You see it twice because the left one is the original video and the right one the processed video. If you only change the audio they will look alike.

Click on Video and make sure Full Processing Mode is activated. Switch to the Audio menu and make sure Direct Stream Copy is active in here. Select the Audio from other file option and pick a audio file on your hard drive. It will be automatically integrated in your video and play in normal speed.

Hit the play button at the bottom to see the video and listen to your audio. It should be in sync. If you are satisfied with the result you can select a compression for the video in the Video > Compression menu and save the video afterwards in File > Save as Avi.

Normally the music will not have the same length as the video and you could sync both by adjusting the frame rate of the video. Click on Video > Frame Rate. Notice the Change so Video and Audio Durations Match ? If you select that option the audio and video will have the same playtime. This means however that the frame rate of the video will either be increased (if the audio is shorter) or decreased (if the audio is longer).

So your video will either play faster or slower depending on your selection. A good tip is to convert the fps to the original fps as well in the same menu. I try to find audio files that roughly have the same length as the video to avoid slow or super fast videos.

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The following method makes it possible to join multiple video files into one big file making it that much easier in the end to play and enjoy the downloaded movie. The method is different depending on the type of movie that you are playing. If the movie consists of multiple mpg movies you can use the windows command line to merge them.

Start the command line by pressing the windows key and R. Enter cmd in the prompt which will start the command line window. Enter the following line into the command line, make sure you enter the right filepath to the movie. I suggest you move the files to the top of a hard drive to ease the amount of typing that needs to be done.

copy /B “C:\movie1.mpg” + “C:\movie2.mpg” + “C:\movie3.mpg” “C:\completemovie.mpg”

This joins movie1.mpg, movie2.mpg and movie3.mpg into completemovie.mpg. You can add more movies to join more parts without problems.

You need an additional programs if the parts are avi files instead of mpg. Download the freeware VirtualDubMod and unpack it to your hard drive. Run the tool and select File, Open Video File and browse to the first part of the movie. Select no If a popup named VBR audio stream detected appears.

Click on File, append Segment and browse to the second part of the movie. Once this is done click on File, Save As and save the newly merged movie file to your hard drive.

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