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🎬 Video File Size Calculator
Estimate video file size from resolution, frame rate, duration, and codec preset.
How Video File Size Is Estimated
Video file size depends primarily on bitrate and duration: Size = Bitrate × Duration. Bitrate varies with resolution, codec efficiency, and quality settings. H.265 (HEVC) is roughly 50% more efficient than H.264 at the same quality. ProRes is a high-bitrate editing codec that produces much larger files.
Bitrate and Quality
Higher bitrate means better quality but larger files. Streaming services like YouTube recommend 8-12 Mbps for 1080p and 35-45 Mbps for 4K. Higher frame rates also increase file size proportionally.
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