6by9 / mmal_render_example Goto Github PK

I've tried several different image encodings hoping to display a YUYV (yuv4:2:2) frame via openmax, but no joy, so I'm trying your mmal render code, but again, whatever encoding I try never looks correct.

It's strange, because, for example the encoding I initially tried,

MMAL_ENCODING_YUYV

works just fine when I convert the same 600k yuyv frame to jpeg via mmal.

BTW,

presumably 2 typo's in:

    param.set |= MMAL_DISPLAY_SET_ALPHA;
    param.layer = 0;    //0 = opaque, 255 = transparent IIRC

should be

    param.alpha = 255;    //255 = opaque, 0 = transparent

Hi! Setting the following: #define ENCODING MMAL_ENCODING_RGB32
makes the program return the following error:

mmal: mmal_vc_port_info_set: failed to set port info (2:0): EINVAL
mmal: mmal_vc_port_set_format: mmal_vc_port_info_set failed 0xc42da0 (EINVAL)

This error shows on all pixel formats that are 32 bits per pixel

Hi! Is there anyway to quickly zero out a buffer? For my 32bpp buffer for a 1920x1080 screen I am finding that it is taking anywhere from 9 to 15 ms to actually zero out the buffer using memset on a raspberry PI. Thanks for the help!