[mythtv-users] pvr-350 Live Tv Audio to remote frontend Question
jim at duda.tzo.com
Thu Dec 29 18:21:37 EST 2005
Jeff Simpson wrote:
> On 12/29/05, *Jim Duda* <jim at duda.tzo.com <mailto:jim at duda.tzo.com>>
> I'm currently an avid Freevo user. I just installed MythTV
> yesterday and
> started playing with it. Mythtv is very impressive.
> I have mythbackend running on one linux box, with a PVR-350 tuner
> card. I
> have mythfrontend installed and running on multiple linux
> boxes. I can
> view and hear mpeg videos on all the frontend boxes. For live TV,
> I can
> see the video, but I cannot hear the audio.
> I've read the mailing list and found a couple of postings on this
> It's my understanding that the livetv audio from a Pvr-350 is
> exported out
> of the rear audio jack and not through the PCI bus like it would
> with the
> mpeg stream. Connecting the PVR-350 audio output back into a
> sound card
> input would allow a mythfrontend to hear audio, however, only on
> the box
> which contains the pvr-350 tuner. This doesn't help any remote
> Another posting, sorry for not consolodating ...
I did find the PVR-350 check-box in the mythfrontend setup, and it is
> Not entirely correct. The PVR-350 takes audio in and saves it with the
> MPEG automatically. If you want to output to TV, you can use the audio
> out of the PVR as well. The loopback audio cable is just to allow that
> machine to play other audio sources to the TV (mythmusic, mythgame,
> etc, things that require /dev/dsp). So in the case of remotely playing
> liveTV, you should not need to use that loopback.
> Is there any means to get the audio from a pvr-350 in a
> mythbackend to the
> mythfrontend on another machine? Are there any plans to address
> this in
> future releases?
> I have 0.18.1 running on my backend/frontend machine with a 350 as
> well as a frontend only on my laptop, and audio works in all cases,
> live and recorded. You say that it can play mpeg videos on the
> back/frontends - do you mean other mpeg videos, or the ones that are
> recorded by myth?
> I'd also take a look at the frontend logs and setup to make sure the
> audio is set up properly. Additionally, check to see that the mpegs do
> contain the audio - you should be able to just play the .nuv files
> with a fairly recent version of mplayer on any linux machine.
> In my freevo environment, I handle the remote livetv issue using mpeg
> streaming from videolan ( www.videolan.org
> <http://www.videolan.org>). It works okay, however,
> mythtv appears much nicer and more integrated, albiet, no audio from a
> pvr-350. I'd really like to get this working an give mythtv a
> shot at
> replacing freevo.
> That's the same way myth handles remote frontends, by streaming the
> mpeg. Alternatively, you can also remote-mount the fs and play them
> that way, but streaming is easy enough and works.
> A likely thing to try is in the remote frontend setup, where it says
> "Use PVR-350 Output" you want to say NO. That option is only for the
> machine with the PVR in it - using that option on another machine will
> make the video and audio try to play through the 350, which won't be
> there, and won't work. You should set it up to use /dev/dsp or
> whatever the equivalent device is for your system.
More information about the mythtv-users