Which codec is commonly associated with good balance of quality and file size and is often labeled as Best Quality File Size?

• A. H.264
• B. MPEG-2
• C. AVI
• D. WAV

Answer: (A)

The idea is choosing a video codec that delivers strong visual quality while keeping file sizes manageable. H.264 is known for this balance because it uses sophisticated inter-frame and intra-frame compression, motion estimation, and efficient entropy coding. These techniques keep perceptual sharpness and detail at much smaller file sizes compared with older codecs, so it’s commonly associated with good quality at a reasonable size. That’s why it’s often the recommended choice when a preset aims for a strong balance between quality and file size.

MPEG-2 is older and less efficient; it generally needs larger files to achieve comparable quality, which is why it isn’t the go-to for the best balance today. AVI isn’t a codec at all—it's a container that can hold different codecs—so it doesn’t indicate a specific balance of quality and size. WAV is an audio format, not a video codec, and its uncompressed nature leads to much larger file sizes without addressing video compression at all.