Video Compression and Editing Concepts

What is the primary function of a codec?

• To convert analog signals to digital signals

• To compress and decompress video and audio signals

• To enhance the resolution of video footage

• To store raw video data without any processing

What does 'bit depth' in video refer to?

• The number of frames per second in a video

• The amount of storage space a video file occupies

• The number of different colors a camera's codec can recognize and record per channel

• The physical size of the camera sensor

Which chroma sub-sampling rate preserves the most color information?

• 4:2:0

• 4:2:2

• 4:4:4

• 2:2:2

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What is a key characteristic of intraframe compression?

• It saves only the differences between consecutive frames.

• It analyzes and compresses each frame independently.

• It is also known as temporal compression.

• It requires going back through previous frames to build the current frame.

What is the primary purpose of creating proxy files in video editing?

• To increase the overall quality of the final video.

• To make video files larger for better archival.

• To create smaller, lower-quality versions for easier manipulation during editing.

• To automatically export the final deliverable without further adjustments.

How does a higher average bitrate generally affect a video file?

• It decreases the video quality and file size.

• It increases the video quality and file size.

• It makes the video easier to stream online.

• It is only relevant for intraframe compressed videos.

What is the main advantage of using a multi-pass export for video compression?

• It is faster than a single-pass export.

• It ensures a constant bitrate throughout the entire video.

• It allows for more efficient allocation of bits, improving quality where needed and saving space elsewhere.

• It is primarily used for intraframe compression.