[mythtv-users] Just can't lick this sound issue
Jonathon.Schmidt at sasktel.sk.ca
Jonathon.Schmidt at sasktel.sk.ca
Tue Nov 25 09:06:46 EST 2003
Ok Doug,
I am a redhat 9 user as well, and I have had my fair share of audio
problems with alsa, however I think I have it licked now as I have done the
install twice. RH9 uses OSS by default, so alsa needed to be installed.
However, you have to install alsa for your sound driver.
With your Alsa driver install did you:
Start with the alsa-driver package:
# tar -xjf alsa-driver-0.9.x.tar.bz2
# cd alsa-driver-0.9.x
# ./configure --with-cards=XXX --with-sequencer=yes
# make
# su
# make install
# ./snddevices
Do all of these steps for the driver package and put your sound card in the
XXXX.
Then:
Next insert the new modules by:
# modprobe snd-XXXX; modprobe snd-pcm-oss; modprobe snd-mixer-oss; modprobe
snd-seq-oss
If you are having trouble inserting snd-XXXX you can check the modules
already inserted by lsmod.
If you see your sound driver already in there you must take it out by rmmod
via82xx
Try this
Jon
Douglas Phillipson
<dougp at intermind.net To: Discussion about mythtv <mythtv-users at mythtv.org>
> cc:
Sent by: Subject: [mythtv-users] Just can't lick this sound issue
mythtv-users-bounces
@mythtv.org
11/25/2003 12:08 AM
Please respond to
Discussion about
mythtv
Joseph A. Caputo wrote:
> On Monday 24 November 2003 11:02, Douglas Phillipson wrote:
>
>>Joseph A. Caputo wrote:
>>
>>>On Monday 24 November 2003 02:46, Douglas Phillipson wrote:
>>>
>>>>Douglas Phillipson wrote:
>>>>
>>>>>Installed MythTV from apt-get install mythtv-suite. Using Redhat
>>>>>9, NVidia Gforce4, WinTV Go capture card.
>>>>>
>>>>>My backend is on the same machine as my frontend. Recording is
>>>>>taking place. I can see the recordings in lower left of screen
>>>>>when I'm in "Watch Recordings". When I choose to play a recording
>>>>>or try watching live TV I get a blank screen. I have "Video
>>>>>player" set to "mplayer -fs %s".
>>>>>
>>>>>Question: What does MythTV use to play live TV and playback
>>>>>recorded video? Is it Mplayer? What??? My xawtv works fine.
>>>>>
>>>>>What am I missing?
>>>>>
>>>>>Thanks
>>>>>
>>>>>Doug P
>>>>
>>>>I discovered I had to install Xine, sorry about that. Now i can
>>>>playback a recorded video (no sound yet) I hear sound during the
>>>>recording in the lineout jack of the WinTV Go board though. But I
>>>>still can't watch Live TV, screen goes black. Any suggestions are
>>>>appreciated...
>>
>>I saw xine, ogle mentioned in a step by step guide
>>(http://pvrhw.goldfish.org/tiki-page.php?pageName=rh9pvr250) and just
>>installed it. When I did my playback (video only) started working so
>>I thought...
>>That was my problem, I thought... Should my Hauppage 190 be similar
>>to the PVR250 as far as this install is concerned?
>
>
> No, the WinTV-GO is just a regular V4L (Video4Linux) card with no
> hardware encoding.
>
>
>
>>I'm curious, why was an "internal player" used/created instead of one
>>of the many available? I hope that's not a dumb question.
>
>
> Well, first of all, Myth records in a 'tweaked' NuppelVideo format that
> isn't natively supported by external players, and second, having an
> internal format & player allows better control over playback features
> (bookmarks, commercial skip, etc).
>
>
>
>>>Whatever gave you the idea you needed to install Xine or mplayer?
>>>Myth uses its own internal player to play back recorded programs.
>>>You only need an external player if you want to play back non-Myth
>>>content using the MythVideo plugin.
>>>
>>>The reason you can't watch LiveTV is likely because your sound card
>>>or driver doesn't support (or isn't configured properly for) full
>>>duplex.
>>
>>Is sound required to see the video?
>
>
> The frontend basically blocks on trying to open the sound device. If it
> can't open the sound device, it won't start playback, hence a black
> screen. There are two likely reasons why this might be happening. One
> reason (and the most common) is that you're running Gnome or KDE and
> need to disable or kill the sound daemon (esd in Gnome; artsd in KDE);
> other processes like mythfrontend can't access the sound device for
> output while another app (esd/artsd) already has it open for output.
> The other possibility is that your sound card or driver doesn't support
> full duplex (i.e., simultaneous record & playback). In LiveTV, what's
> happening is the live feed is being recorded & encoded and then
> immediately played back. So, if your card isn't doing full duplex,
> then the frontend can't open the device because the backend already has
> it open for recording.
>
>
>
>>>The reason you have no sound when you play back a recording is
>>>likely because your recordings have no sound (i.e., your sound is
>>>mis-configured for Myth).
>>
>>I'm now hearing sound when I attempt live watching, so I thought I
>>had sound licked...
>
>
> But is your sound out of sync, as in a couple of seconds ahead of the
> video?
>
>
>
>>>Read the section in the docs about troubleshooting audio (http://
>>>www.mythtv.org/docs/mythtv-HOWTO-7.html and
>>>http://www.mythtv.org/docs/ mythtv-HOWTO-20.html#ss20.11 & try to
>>>get your audio configured properly.
>>>
>>>-JAC
>>>
>>>PS- In future, it would be helpful to submit your system specs when
>>>asking for help. Include things like: motherboard, CPU, sound
>>>card, video card, Linux distro, sound drivers, video card, tuner
>>>card, version of Myth & source of Myth (i.e., RPM, Deb, source
>>>tarball or CVS)
>>
>>OK, Thanks I'll keep plugging away at it and post my resulting
>>successful procedure. And thankyou VERY much for the support! Are
>>you the author of any of this great stuff?
>
>
> Sorry, I didn't see your specs at the top of your original post... but
> you haven't indicated what kind of sound card you have or whether
> you're using ALSA or OSS. This is important information when
> troubleshooting audio!
>
> -JAC
Well I've jacked my sound all up. I have VIA VT82xx audio on mobo.
Does Redhat 9 use ALSA or OSS by default? Anyway I installed
alsa-drivers, alsa-lib, alsa-utils from source, no errors. Changed
/etc/modules.conf according to the alsa site's specs:
# ALSA portion
alias char-major-116 snd
alias snd-card-0 snd-via82xx
# module options should go here
# OSS/Free portion
alias char-major-14 soundcore
alias sound-slot-0 snd-card-0
# card #1
alias sound-service-0-0 snd-mixer-oss
alias sound-service-0-1 snd-seq-oss
alias sound-service-0-3 snd-pcm-oss
alias sound-service-0-8 snd-seq-oss
alias sound-service-0-12 snd-pcm-oss
then did "modprobe snd-via82xx" and get: Initmodule: no such device.
If RH 9 already used alsa should I have even installed alsa?
Confused but thankful for you experts...
Doug P
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