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Bitrate: Simple Definition
Bitrate is the amount of data used per second in an audio or video file, measured in kilobits per second (kbps) or megabits per second (Mbps). Higher bitrate means better quality but larger file size.
Think of bitrate like water flow in a pipe. A higher bitrate is like a wider pipe - more data flows per second, resulting in better quality. A lower bitrate is a narrower pipe - less data, smaller files, but lower quality.
How Bitrate Affects Quality
For video, bitrate directly controls image quality. A 1080p video at 2Mbps will look noticeably worse than the same video at 8Mbps. YouTube recommends 8Mbps for 1080p60 uploads.
For audio, bitrate determines sound quality. MP3 at 128kbps is acceptable for casual listening. 320kbps is considered near-CD quality. FLAC (lossless) has variable bitrate of 700-1400kbps.
Examples of Bitrate
128kbps MP3
Standard audio streaming quality. Good for casual listening on earbuds. File: ~1MB per minute.
320kbps MP3
High quality audio. Near-identical to CD quality for most listeners. File: ~2.5MB per minute.
4Mbps video
Good quality for 720p video streaming. Used by Netflix for SD streams.
8Mbps video
Good quality for 1080p video. YouTube recommends 8Mbps for 1080p60 uploads.
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