Dirk Meyer wrote:
Duncan Webb wrote:
My vbishow program does may do what you require for ivtv cards:
Thanks, but it does not work for me (normal v4l2 card, no ivtv). Here
is the problem: you set
| fmt.type = V4L2_BUF_TYPE_SLICED_VBI_CAPTURE;
| fmt.fmt.sliced.service_set = (std & V4L2_STD_NTSC) ? V4L2_SLICED_VBI_525 :
V4L2_SLICED_VBI_625;
| fmt.fmt.sliced.reserved[0] = 0;
| fmt.fmt.sliced.reserved[1] = 0;
| if (ioctl(fh, VIDIOC_S_FMT, &fmt) < 0) {
This stops with invalid argument. Reading the doc at
http://v4l2spec.bytesex.org/spec/r6925.htm shows me the following
possible types:
| V4L2_BUF_TYPE_VIDEO_CAPTURE 1 Buffer of a video capture stream, see
Section 4.1>.
| V4L2_BUF_TYPE_VIDEO_OUTPUT 2 Buffer of a video output stream, see
Section 4.3>.
| V4L2_BUF_TYPE_VIDEO_OVERLAY 3 Buffer for video overlay, see Section
4.2>.
| V4L2_BUF_TYPE_VBI_CAPTURE 4 Buffer of a raw VBI capture stream, see
Section 4.6>.
| V4L2_BUF_TYPE_VBI_OUTPUT 5 Buffer of a raw VBI output stream, see
Section 4.6>.
| V4L2_BUF_TYPE_PRIVATE
The one you set is not in there and not using the sliced version
doesn't give me any data :(
Sorry that I've taken a while to reply...
I've been looking at how to get vbishow to work with bttv cards, it
doesn't seem to be quite as easy as ivtv cards. I guess that sliced vbi
data is nicely packaged up into teletext lines where as normal vbi data
needs a bit more processing. The module vbi.c in alevt should help me to
implement vbishow for bttv cards...
Anyway from the sample output that I sent is it what your are looking for?
Duncan
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