Kvazaar - 10 bit and 4:2:2 and 4:4:4 YUV sampling details

strukturag / libheif

libheif is an HEIF and AVIF file format decoder and encoder.

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Open PetrMinar opened 1 day ago

PetrMinar commented 1 day ago

Just a quick information that might be useful for anyone trying to use kvazaar encoder to write heif files:

10 bit support is compile time option for the codec. Single binary cannot produce both 8bit and 10bit h265 bitstream.
kvazaar only supports 4:2:0 and 4:0:0 yuv samplings. When you try to configure and use the encoder to produce 4:2:2 / 4:4:4, it generates garbage. See link.

Hope this saves some time to anyone trying to make it run.

farindk commented 1 day ago

Thank you for the information. The above commit forces the colorspace to 4:2:0 when kvazaar is used.