How to get 12bit video options in DirectDraw/VfW?

rshotbolt

Hi, I have modified my own freeware microscopy software (MycoCam) to capture images very successfully from my ASI120MM. I'm using DirectDraw and Video For Windows (VfW). In the list of ASI120MM devices, all the frame size options are 8-bit resolution. Does anyone here know how to access the full 12 bits of data via DD/VfW?

Thanks, Richard

rshotbolt

I'm guessing it's because if there is a higher-res mode, it's media subtype is not in the list I'm using in my software:

MediaSubTypeNames: array of TSubTypeName =

((SubType: @MEDIASUBTYPE_YVU9; Name: '(YVU9)'),

(SubType: @MEDIASUBTYPE_Y411; Name: '(Y411)'),

(SubType: @MEDIASUBTYPE_Y41P; Name: '(Y41P)'),

(SubType: @MEDIASUBTYPE_YUY2; Name: '(YUY2)'),

(SubType: @MEDIASUBTYPE_YVYU; Name: '(YVYU)'),

(SubType: @MEDIASUBTYPE_UYVY; Name: '(UYVY)'),

(SubType: @MEDIASUBTYPE_Y211; Name: '(Y211)'),

(SubType: @MEDIASUBTYPE_RGB24; Name: '(RGB24)'),

(SubType: @MEDIASUBTYPE_RGB32; Name: '(RGB32)'),

(SubType: @MEDIASUBTYPE_RGB565; Name: '(RGB565)'),

(SubType: @MEDIASUBTYPE_RGB555; Name: '(RGB555)'),

(SubType: @MEDIASUBTYPE_ARGB32; Name: '(ARGB32)'),

(SubType: @MEDIASUBTYPE_RGB565; Name: '(RGB565)'));

Sam@ZWO

that's not possible for directshow

because there is no such media type

rshotbolt

There is a way which probably wouldn't be difficult to implement - you could have a device setting which toggles the output between either the top eight bits or the bottom eight bits of the 12-bit data.