CorePNG
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Parchivist (Talk | contribs) (Created page with "{{FormatInfo |formattype=electronic |subcat=Video |released=2003 }} '''CorePNG''' is a lossless codec based on the PNG image format. Each frame can be encoded as-is (I-frame)...") |
Revision as of 18:50, 29 October 2023
CorePNG is a lossless codec based on the PNG image format. Each frame can be encoded as-is (I-frame), or can represent a delta from the previous frame (P-frame). In both cases the data is compressed in standard PNG format.
It uses the FourCC code png1.
The codec supports RGB[A] and YUV colorspaces: In RGB mode every frame is compressed as a PNG image; in YUV mode a frame is stored as 3 PNG images with order Y, U, V.
CorePNG was originally developed for use with subtitles, but evolved into a lossless codec that claims sometimes to outdo Huffyuv and Loco in terms of compression.
