[linux-dvb] HVR 850 analog
guzowskip at linuxmail.org
Wed Nov 19 13:27:18 CET 2008
I have a Hauppauge HVR-850, and I am trying to get it to work with
Linux. I am able to use the au0828 drivers in the 2.6.27 kernel to
get digital signals from my 850, but I can't seem to find any way to
get an analog signal. I have searched all around and could not find a
solution. Does anyone have any information on this?
To clarify, my kernel version is 2.6.27, the HVR-850's USB ID is
2040:7240. I found some links saying that the 850 is similar to the
950Q, if so, any information on that might help too.
I know the hardware supports analog, as the Windows software is able
to get a signal.
Thanks for your time!
Not sure I can help but I'll throw out a couple of ideas since I was having a similar issue and tuner is similar to yours (I think they are based on the same chipset). I'm running Ubuntu 8.10 (Intrepid Ibex). I have a Pinnacle HDTV Pro USB stick that works in Windows to show analog and I wanted to do the same in Linux so I could watch a TV signal coming from my cable set top box via RF-out. It was a long journey but thanks to a lot of folks on this forum, particularly Devin Heitmuller, I finally got it working so I'll summarize the steps I took.
First, I had quite a job to get the right driver configured and that was compounded by the fact that there were two of them out there. By kernel 2.6.27 (I think) my hardware was recognized out of the box. The other issue I had was firmware but that one was easily solved. If you are getting digital signals, it sounds like you have these issues resolved already.
Secondly, I needed a software program with which to view TV with the usb tuner. I might add, I was doing this at the same time I was fiddling with drivers which was probably counterproductive. Since you apparently have the connectivity issue resolve, this shouldn't be an issue for you.
I tried MeTV, MythTV, Kaffeine, TVTime, XawTV, Gnome TV, Zapping TV viewer, Xine, and a couple of others. The only one of those I could get to work was TVTime and even then I didn't have sound. Most of the others need a channels.conf file which is done by scanning according to certain parameters with either a built-in scanner or a command-line tool like scan or w_scan. Depending on your distribution you may have these available already or you may need to download/install them. In any case, I never had any success developing a channels.conf file by scanning either from the RF-out line off the cable box or from the native cable signal coming out of the wall.
I finally succeeded by using MPlayer and passing a bunch of parameters to it from the command line. Once I got it working I set up a launcher with the entire command string so that all I had to do is hit the button on my desktop to show TV. The command I am using is:
mplayer -vo xv tv:// -tv driver=v4l2:alsa:immediatemode=0:adevice=hw.1,0:norm=ntsc:chanlist=us-cable:channel=3
This gives me a simple window tuned to NTSC channel three. I change the channel on my cable box and change the volume with either the computer or cable box or both. MPlayer has a lot more capability but this is all I am using. There is a companion recorder function called Mencoder which you can use to record the signal if you are looking for a DVR function. I have not used it yet but a typical command line looks like the following:
mencoder tv:// -tv driver=v4l2:alsa:immediatemode=0:adevice=hw.1,0:norm=ntsc:chanlist=us-broadcast:input=0:norm=ntsc:width=640:height=480:forceaudio:audiorate=48000 buffersize=64 -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=400:keyint=30 -oac mp3lame -lameopts br=32:cbr:mode=3 -ffourcc divx -o test.avi
Hope this helps.
Paul in NW Florida
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