Hi,<br><br>I've tested Theora on an HD-ready material, with quality 7, single pass. Resulting bitrate was 1.8Mb/s. Most parts of a movie encoded this way look fine, usually better than a DVD, and
in daylight scenes, have no noticeable artifacts at all. But it seems that red surfaces are too much compressed; blocking artifacts are clearly visible on them. Also, white people have slightly smeared faces, especially in scenes with low motion.<br>
<br>I guess I could pass a custom quantization matrix to <a class="el" href="file:///home/wojownik/Pulpit/libtheora-1.1.1/doc/libtheora/html/group__encfuncs.html#g3a427f6514dfdc01ea72172c469d51d9">th_encode_ctl</a> () but I got no idea how to affect only the red plane while leaving the rest of encoding as it is. So please tell me how to deal with it.<br>