JPEG specifies the matrix, I think it's the same as BT.470. It's fairly easy to ...

astrange on June 5, 2021 | parent | context | favorite | on: John Carmack on JPEG

JPEG specifies the matrix, I think it's the same as BT.470. It's fairly easy to guess the intent even if the metadata is missing (which, well, it usually is) - just have to know if the source is a video or not and then if it's HD or not.