Qc: Video quality check and h264/HEVC/av1 ladder optimization

Qc: Video quality check and h264/HEVC/av1 ladder optimization Technical analysis in seconds : bitrate, peaks and GOP structure without decoding. Then one decode fanned out to SI/TI (ITU-T P.910), shot detection, black and frozen segments, letterbox/pillarbox, luma levels and camera motion (each shot static, pan, tilt, zoom, tracking or handheld, with a shake measure).

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• Technical analysis in seconds : bitrate, peaks and GOP structure without decoding.
• Then one decode fanned out to SI/TI (ITU-T P.910), shot detection, black and frozen segments, letterbox/pillarbox, luma levels and camera motion (each shot static, pan, tilt, zoom, tracking or handheld, with a shake measure).
• Audio QC at no extra wall time : every audio track measured while the video decodes: loudness per ITU-R BS.1770-5 (integrated, range, true peak, EBU Tech 3341/3342 conformant, within 0.01 LU of ffmpeg's ebur128 ) against EBU R 128, ATSC A/85 or a streaming target; silence, muted channels, clipping, DC offset and phase problems ( audio ).
• VMAF with a confidence interval : short clips sampled across shots until the 95% interval is narrower than your target.
• The intervals really cover the truth 95% of the time, measured by replaying thousands of runs.
• --exact scores every frame, bit-exact with Netflix's vmaf tool, at 8 and 10 bits.