4 Digital Video Free Online FlashCards

What creates the impression of motion in digital video?

A video displays still images, called frames, rapidly in sequence to create the impression of motion.

What does a video's frame size describe?

Frame size is the number of pixels in each frame, written as width × height. For example, 1920 × 1080 is commonly called 1080p.

What is frame rate, and what can a higher rate do?

Frame rate is the number of frames displayed per second, measured in fps. Higher frame rates can make fast motion look smoother.

What does a video's aspect ratio describe?

Aspect ratio compares a frame's width with its height. A 16:9 frame is widescreen, while 9:16 is vertical.

How do progressive and interlaced video differ?

Progressive video displays complete frames in sequence. Interlaced video divides each frame into alternating fields; progressive is the usual choice for contemporary web delivery.

Why keep project frame rate consistent with the footage?

Frame rate changes may require frames to be repeated, blended, or removed. Keeping project settings consistent with the footage helps produce predictable results.

Why record extra footage around the action?

Leave a little extra footage before and after the action so clips are easier to trim during editing.

What is a sequence in video editing?

A sequence is the timeline where video, audio, titles, and effects are assembled.

How does a direct cut differ from a dissolve?

A direct cut joins one shot to the next. A transition, such as a dissolve, changes gradually between shots.

What do multiple tracks make possible in an edit?

Multiple tracks let editors layer elements such as titles, music, narration, and images.

How does a container differ from a codec?

A container packages video, audio, and related information. A codec compresses and decompresses media; they are different choices.

What is one visual risk of excessive video compression?

Compression reduces the data needed to store or transmit video. Excessive compression can make details look blocky or blurry.