I have been looking all over for an answer to this, but i can't...
i am trying to just create a simple TV viewer using an overlay. but
everytime:
if (-1 == ioctl(fd, VIDIOCCAPTURE, (int *)&b))
{ perror("capture"); close(fd); exit(1);}
is called i get:
"capture: Invalid argument"
but if i run "xawtv" first, i do not get the error, so i obviously not
setting something right.
without all the extra code, here is what i am doing:
vidName="/dev/video";
fd=open(vidName,O_RDWR)
ioctl(fd,VIDIOCGCAP,&capability)
vc.channel=0;
strcpy(vc.name,"NTSC");
vc.tuners=0;
vc.flags=VIDEO_VC_AUDIO ;
vc.type = VIDEO_TYPE_TV;
vc.norm=VIDEO_MODE_NTSC;
ioctl(fd, VIDIOCSCHAN, &vc);
vw.x=0; vw.y=0;
vw.width=640; vw.height=480;
vw.chromakey=1;
vcl[0].x=0; vcl[0].y=0;
vcl[0].width=640; vcl[0].height=480;
vw.clips=vcl;
vw.clipcount=0;
ioctl(fd,VIDIOCSWIN,&vw);
vt.tuner=0;
strcpy(vt.name,"tuner");
vt.rangelow=55250;
vt.rangehigh=799250;
vt.flags=VIDEO_TUNER_NTSC;
vt.mode=VIDEO_MODE_NTSC;
vt.signal=32678;
ioctl(fd, VIDIOCSTUNER, &vt);
unsigned long longfreq=(freq*16)/1000;
ioctl(fd, VIDIOCSFREQ, &longfreq);
int b=1;
ioctl(fd, VIDIOCCAPTURE, &b);
thanks for any help,
-- adam grossman
aglist (at) metashadow.com
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