Video compression
Video compression shrinks raw video into far fewer bytes so it is cheaper to store and quicker to stream. It works by removing information that repeats within each frame and between neighboring frames, plus fine details the eye barely notices. A codec such as H.264 or AV1 performs the compression. Good compression keeps quality high while cutting bandwidth and storage costs.
Why it matters
Video compression sets your storage and delivery bills and shapes what viewers see. Strong compression lowers cost and helps video start fast on weak networks. Too much makes it blurry or blocky, which hurts watch time on premium content.
How it works
- The encoder looks within each frame for areas that repeat, such as a clear sky.
- It compares each frame with nearby frames and stores only what changed.
- Fine detail the eye barely notices is rounded away to save more bits.
- The result is packed into a compact stream that a player decodes back into video.
How much does video compression reduce file size?
Video compression usually shrinks raw video by a factor of hundreds or more. For example, uncompressed 1080p video runs at well over 1 Gbps, while YouTube recommends uploading 1080p at about 8 Mbps. Streaming renditions often use even less, depending on the codec and content.
Why does my compressed video look blurry or blocky?
Compressed video looks blurry or blocky when the bitrate is too low for the content. Fast motion, grain, confetti and dark scenes need many bits, so the encoder discards too much detail. Raising the bitrate, using a more efficient codec or encoding each title with its own settings usually helps. If sports or other fast motion is where your picture breaks up, FastPix Pro encoding is built for high-motion content, at $0.026719 per minute at 1080p.
Where it's used
OTT services compress each film into several sizes, so viewers get a quick start on phones over mobile data and a sharp picture on large TVs at home.
Where it usually goes wrong, and how FastPix handles it
Teams set compression once and assume quality holds, but they cannot see when viewers end up on low bitrates or upscaled, soft-looking video.
Compression artifacts leave traces in FastPix Video Data: average bitrate, dropped frames and upscale or downscale percentage are reported for every view. Its render quality score, built from upscaling and resolution changes, shows where compression or delivery choices hurt what viewers see. That ranks titles and devices by how much the picture suffers, so the worst cases get fixed first.
By the numbers
- YouTube recommends uploading 1080p SDR video at standard frame rates at 8 Mbps and 4K at 35 to 45 Mbps. (YouTube Help: Recommended upload encoding settings)
