What the “overlay” feature does and what is the difference between mode 1 and 2?
Overlay is a neat solution to provide quick picture composition on screen, without increasing CPU load too much. The GPU on your graphic card does most of the processing. Overlay can be created in different formats, i.e. color space formats. If you’re eager to learn more on that have a look here: http://www.fourcc.org . Most important for quick overlay drawing are YUY2, YV12 and UYVY. YV12 is the fastest, but causes some trouble with cards which however don’t properly support this format, thus image quality is decreased. For instance, Matrox cards as well as NVIDIA are said to have bad driver architecture and bad overlay support. YV12 is usefull on slow machines for MPEG4 decoding ( DivX and XviD is heavy work for CPU, so every off-load is “good”). You can try to switch it on in BS.Player by enabling overlay mode 1 (Internal renderer overlay), though, curiously, you will get YUY2 anyway, when your XVid/DivX resides in an OGM container (instead of AVI). If you switch to BS.Player overla
