{
  "date": "2026-10-19",
  "units": "decimal bytes; seconds; SSIM All is not percent quality",
  "portrait_source": {"bytes":2562891,"seconds":10,"width":720,"height":1280,"synthetic":true},
  "portrait_encodes": [
    {"mode":"constant","target_bytes":1000000,"output_bytes":1357410,"width":720,"height":1280,"elapsed_ms_single_run":1855},
    {"mode":"variable","target_bytes":1000000,"output_bytes":1345098,"width":720,"height":1280,"elapsed_ms_single_run":1077},
    {"mode":"variable","target_bytes":500000,"output_bytes":1325658,"width":720,"height":1280,"elapsed_ms_single_run":1137},
    {"mode":"variable","target_bytes":500000,"output_bytes":478136,"width":360,"height":640,"elapsed_ms_single_run":789}
  ],
  "quality_checks": [
    {"clip":"silent synthetic pattern","source_bytes":551790,"output_bytes":375885,"width":640,"height":480,"frames":96,"fps":24,"ssim_all":0.984575},
    {"clip":"synthetic motion plus tone","source_bytes":4080132,"output_bytes":1028855,"width":1280,"height":720,"frames":240,"fps":30,"ssim_all":0.945047}
  ],
  "matched_parts_allocation": [
    {"clip":"synthetic motion plus tone","method":"earlier allocation","output_bytes":8030602,"ssim_all":0.976276,"frames":240,"fps":30},
    {"clip":"synthetic motion plus tone","method":"source-bounded allocation","output_bytes":3687046,"ssim_all":0.971348,"frames":240,"fps":30}
  ],
  "large_source": {"bytes":1661223995,"private_media_published":false},
  "parts": [
    {"nominal_start_seconds":0,"nominal_end_seconds":60,"bytes":40255684,"container_seconds":60.073979,"width":1920,"height":1246,"public_product":true,"full_decode_passed":true},
    {"nominal_start_seconds":60,"nominal_end_seconds":120,"bytes":41746974,"container_seconds":60.074667,"width":1920,"height":1246,"public_product":false,"full_decode_passed":true}
  ],
  "limitations": ["Single Mac and Chrome", "Small synthetic corpus", "Human quality and audio sync unreviewed", "No all-device or HDR claim", "First two intervals are not whole-source proof", "No customer, competitor, ranking or revenue result"]
}