| Pregunta: | 50767 - CAPTURAR Y MANIPULAR VIDEO DE WEB CAM EN PB |
| Autor: | Christian Barrios Tolosa |
| Que tal jovenes, Quisiera saber si alguien ha podido capturar y manipular video de una web cam en power builder. Es para una aplicacion que estoy haciendo en mi empresa y necesito obtener el video de una camara y capturar la fotografia del empleado al momento del ingreso al establecimiento. La camara es conenectada por USB. Si alguno tiene la respuesta le agradecere muchisimo. | |
| Respuesta: | Alejandro Gomez |
| Cristian , como estas, sabes existe una funcion api para capturar imagenes, yo lo he intentado pero no he logrado aun que guarde las imagenes . //Local external functions. function ulong capCreateCaptureWindowA(string lpszWindowName,ulong dwStyle,long li_x ,long li_y ,long nWidth ,long nHeight ,ulong ParentWin ,long nId ) LIBRARY 'AVICAP32.DLL' //Instance Variables Uint lhand Constant long GET_FRAME = 1084 Constant long COPY = 1054 Constant long WM_USER = 1024 Constant long WM_CAP_START = WM_USER Constant long WM_CAP_STOP = WM_CAP_START + 68 Constant long WM_CAP_DRIVER_CONNECT = WM_CAP_START + 10 Constant long WM_CAP_DRIVER_DISCONNECT = WM_CAP_START + 11 Constant long WM_CAP_SAVEDIB = WM_CAP_START + 25 Constant long WM_CAP_GRAB_FRAME = WM_CAP_START + 60 Constant long WM_CAP_SEQUENCE = WM_CAP_START + 62 Constant long WM_CAP_FILE_SET_CAPTURE_FILEA = WM_CAP_START + 20 Constant long WM_CAP_SEQUENCE_NOFILE =WM_CAP_START+ 63 Constant long WM_CAP_SET_OVERLAY =WM_CAP_START+ 51 Constant long WM_CAP_SET_PREVIEW =WM_CAP_START+ 50 Constant long WM_CAP_SET_CALLBACK_VIDEOSTREAM = WM_CAP_START +6 Constant long WM_CAP_SET_CALLBACK_ERROR=WM_CAP_START +2 Constant long WM_CAP_SET_CALLBACK_STATUSA= WM_CAP_START +3 Constant long WM_CAP_SET_CALLBACK_FRAME= WM_CAP_START +5 Constant long WM_CAP_SET_SCALE=WM_CAP_START+ 53 Constant long WM_CAP_SET_PREVIEWRATE=WM_CAP_START+ 52 Long wm_cap_savedatdib = 1049 Long wm_cap_dlg_videoformat = 1065 Long wm_cap_dlg_videosource = 1066 Long wm_cap_dlg_videodisplay = 1067 Long wm_cap_get_videoformat = 1068 Long wm_cap_set_videoformat = 1069 Long wm_cap_dlg_videocompression = 1070 Long cf_bitmap = 2 Long wm_close = 16 Ulong scrcopy = 32 string gs_pic_path string gs_cd_path string gs_path string gs_ds_pic string gs_ds_cd string gs_cd_rq long gl_pic_sj = 0 //boton iniciar camara string lpszName ulong l1 l1=handle(parent) lpszName='webcam.' lhand=capCreateCaptureWindowA(lpszName,262144+12582912+1073741824 + 268435456 ,10,10,200,200,l1,0) if lhand <> 0 then send(lhand, WM_CAP_SET_CALLBACK_VIDEOSTREAM, 0, 0) send(lhand, WM_CAP_SET_CALLBACK_ERROR, 0, 0) send(lhand, WM_CAP_SET_CALLBACK_STATUSA, 0, 0) send(lhand, WM_CAP_DRIVER_CONNECT, 0, 0) send(lhand, WM_CAP_SET_SCALE, 1, 0) send(lhand,WM_CAP_GRAB_FRAME, 0, 0) Send(lhand, WM_CAP_SAVEDIB, 0, 0) send(lhand, WM_CAP_SET_PREVIEWRATE, 66, 0) send(lhand, WM_CAP_SET_OVERLAY, 1, 0) send(lhand, WM_CAP_SET_PREVIEW, 1, 0) end if //boton grabar imagen string s_map s_map='c:save.bmp' if FileExists(s_map) then FileDelete(s_map) if lhand <> 0 then Send(lhand,WM_CAP_FILE_SET_CAPTURE_FILEA,0,s_map); p_2.visible = true st_1.visible = false p_1.picturename = s_map SendMessage(lhand, WM_CAP_DRIVER_DISCONNECT, 0, 0) lhand =0 this.enabled = false cb_1.enabled = true end if //boton captura video string s s='c:save.avi' if lhand <>0 then Send(lhand,WM_CAP_FILE_SET_CAPTURE_FILEA,0, s); Send(lhand,WM_CAP_SEQUENCE, 0, 0) end if ojala te sirva de algo...podrias enviarme tu correo para discutir del tema. saludos | |