Standard 1080p videos of this length (~120 minutes) average 5 to 8 Mbps. A true "4K Work" file for SSIS-858 typically ranges between 25 Mbps and 45 Mbps in variable bitrate (VBR) mode. Consequently, the file size often exceeds 15 GB for a single video. This high bitrate prevents "banding" (visible color steps in gradients) and "macro-blocking" (pixelated squares during fast motion).
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The ssis858 standard likely employs variable bitrate (VBR) encoding with a two-pass system. This means the encoder analyzes the entire video file first to allocate higher bitrates to complex scenes (action, rapid lighting changes) and lower bitrates to static scenes, maximizing efficiency without sacrificing perceived quality.
For collectors and videophiles, SSIS-858 is frequently cited on forums as a reference-quality file. When properly encoded (HEVC/H.265 codec, high bitrate), the 4K version reveals details that 1080p sources obscure: