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Hour 17. Using Video > Using Video

Using Video

You need to understand one primary concept when using video in Flash: sounds perform like stream sounds, and pictures act like Graphic symbols. This isn't “streaming” where you can experience the beginning of a media source while the rest downloads (although Flash does this automatically). Recall that sounds in Flash can be set to Stream or Event, and it makes a difference. Additionally, remember how an instance of a Graphic symbol differs from one of a Movie Clip. (These topics were covered in Hour 10, “Including Sound in Your Animation,” and Hour 12, “Animating Using Movie Clip and Graphic Symbols,” respectively.)

As a review, a sound in a keyframe set to Event begins to play when that frame is reached and continues to play until it's finished—even if the timeline slows down to display all the frames. Stream sounds are locked to the timeline. This means that you need to make sure that the sound has enough space in the timeline to finish. The reason to review Stream sounds is that a video placed in a keyframe needs enough space in the timeline to finish playing the audio portion. For example, if the video is 10 seconds long and the frame rate is 12 fps, you need 120 frames in the timeline. Another reason to remember Stream is that by default all the audio in your video is affected by the global publish setting for stream audio (File, Publish Settings, Flash tab).


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