On Fri, 2008-08-29 at 11:25 -0500, Joe Henley wrote:
> Hi,
>
> I'm having a similar problem. I'm running ivtv version 0.10.6-123.el5,
> on CentOS-5 version 5.1, kernel version 2.6.18-53.1.21.el5. I have the
> PVR-350 card from Hauppauge.
>
> I'm trying to access the uncompressed (Ie., not MPEG-2) stream from the
> card. I need it to be a standard YUV format (not HME12) so I can use it
> in TVTime. I read the Readme.devices, especially the part about the
> ivtv module option, yuv-fixup=1. So I added that to my modprobe line.
>
> With that option line in place, my system won't completely boot; it
> hangs on udev "stuff." If I remove the option, my machine boots fine.
> Without the option in place I looked at the ivtv options list via
> modinfo, and the yuv-fixup option is not listed. Is it version specific?
If sbin modinfo doesn't list it, then the module does not support it.
> Any help or suggestions will be greatly appreciated.
v4l2-ctl can show you a capture card's supported formats:
For my ivtv driver, built from the bleeding edge sources, it returns:
$ v4l2-ctl -d /dev/video1 --list-formats
ioctl: VIDIOC_ENUM_FMT
Type : Video Capture
Pixelformat : HM12
Name : HM12 (YUV 4:2:0)
Type : Video Capture
Pixelformat : MPEG (compressed)
Name : MPEG
Which is likely all the hardware supports. Also the trend has been to
get software format conversions out of kernel space and into user space
libraries.
I have no experience with using YUV and very little with TVTime, but off
the cuff, here are some things to investigate:
I don't know if something like ffmpeg or gstreamer can provide on the
fly conversion that TVTime could use (if it can read from a pipe), but
I'd look there first.
Hans de Goede has been working on a library (for webcams at least) to do
conversions. Maybe the libv4lconvert part of the package and the
intercept wrappers can help. I'm not sure. Some details are here:
http://hansdegoede.livejournal.com/3636.html
http://people.atrpms.net/~hdegoede/libv4l.spec
You should probably also ask format conversion questions on the
video4linux list.
Regards,
Andy
> Thanks!
>
> Joe Henley
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