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la_tengo_como_burro
PostPosted: Mon Jan 30, 2006 2:03 pm 
Hi:

I've been trying to figure this out for a week allready and I can't take it anymore!!!, i'm desperate. I have a Pinnacle PCTV (the regular one not the pro) with the BT878 chip and the phillips tuner. Everything works fine exept for the audio. I have the following line right now on etc\mythtv\modules\bttv

options bttv card=39 tuner=2

I'm using KNOPPMYTH and the only thing that I hear through the speakers is a constant "TAP" sound. I know that the sound card on the computer works because I am able to listen to CDs through MYTHTV (and I dont have the analog cable connected from the CD to the sound card) so it obviously works.

I do not want to spend more money buying one of those really expensive PVR-250 and this is a project for school. Thanks in advance for your help.
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wmcyow
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PostPosted: Mon Jan 30, 2006 2:15 pm 
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Joined: Thu Jan 26, 2006 9:08 am
Posts: 5
After much searching, and trying many things that did not work it turns out my problem with no sound was a muted tuner card. Try:

Code:
v4lctl -c /dev/video0 volume mute off
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la_tengo_como_burro
 Post subject:
PostPosted: Mon Jan 30, 2006 2:30 pm 
Wow that was fast! thanks a lot for your response, I did try that I placed that line on the /etc/init.d/bootmisc.sh right at the end. and it did not work. Is that how you are supposed to do it or in a Shell Window?
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la_tengo_como_burro
 Post subject:
PostPosted: Mon Jan 30, 2006 5:52 pm 
I tried it also under a shell window and it went through, but it still does not work. I went to ALSAMIXER and raised the volume for everything and still nothing, the only thing I hear is a repetitive "click" sound on the speakers, this is really frustrating. :(

Anbody has any other ideas???
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la_tengo_como_burro
 Post subject:
PostPosted: Mon Jan 30, 2006 10:21 pm 
I finally got some sound out of the tunner card (connecting the speakers directly to the tuner card) but i' having th following problems now:

1) Sound is so faint that I have to put the speaker in my ear to be able to listen to it.

2) Audio is out of sync with the video

I turned the volume all the way up in all the setting of ALSAMIXER and NOTHING

What in the world is going out now? is Mythtv a chimera that nobody can ever reach? I think I'm just going to go buy the TIVO, they had one at CompUSA for $19 after rebates. (this is true, but i'm kidding I would never get a tivo) Can somebody help me out, for the life of God!!! :?
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tjc
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PostPosted: Mon Jan 30, 2006 10:44 pm 
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Joined: Thu Mar 25, 2004 11:00 am
Posts: 9551
Location: Arlington, MA
Have you got a jumper from the line out of the TV card to the line in of your sound card? Have you got the right things muted and enabled with "alsamixer"? Have you got the right card type selected? Have you searched the forum and the wiki for things like "no sound with bttv" or "sound out of sync with video"? Have you read the MythTV setup docs? See: http://www.mythtv.org/docs/mythtv-HOWTO.html particularly: http://www.mythtv.org/docs/mythtv-HOWTO-7.html

I suspect no one has bothered to answer until now because this type of issue is old hat to everyone but the rawest newbie, and everyone expects you'll stumble across the answer "any minute now".
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la_tengo_como_burro
 Post subject:
PostPosted: Mon Jan 30, 2006 10:52 pm 
Wow Big help there. No actually I had not done any of that, I had no idea that there was so much more, I thought I was just about to finish. Thank you very much for pointing me in the right direction!!! :lol:
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la_tengo_como_burro
 Post subject:
PostPosted: Fri Feb 03, 2006 7:37 pm 
Hi Everybody, its me again... :D

My card is a Pinnacle PCTV with a BT878 and a Phillips tuner and so far so good I have everything working. but..... The image quality on my tuner card is not how I expected, it looks all pixelated (just as a bad DIVX and a VCD Movie) I know is not my Video Card because Everything else looks perfect... Is this how it is supposed to look??? Am I expecting too much from theese tuner cards? can it ever look like the quality of a normal TV? If so how can I improve the tuner image quality???


Thanks in advanced for your help.
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tjc
 Post subject:
PostPosted: Fri Feb 03, 2006 10:47 pm 
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Joined: Thu Mar 25, 2004 11:00 am
Posts: 9551
Location: Arlington, MA
You may be over compressing the captured data. How big are your recordings for an hours worth of TV? Mine run about 2.2 Gb/hour with a PVR-250 encoding to MPEG-2. Much below 1Gb/hour even with MPEG-4 and quality will suffer. You may also have signal or settings problems with your capture card. It could also be a playback problem.
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la_tengo_como_burro
 Post subject:
PostPosted: Sat Feb 04, 2006 5:03 pm 
Thanks for your prompt answer:

So you think is a compression issue, that makes sense since what you watch on the screen is actualy the playback. I am a newbie and I don't really know how to tell what i'm using to compress, if it is MPEG2 or 4, I guess I am using the Knoppix default because I've never altered that setting, can anybody tell me how to acces theese settings?
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adamzap
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PostPosted: Tue Feb 07, 2006 11:36 pm 
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Joined: Thu Feb 02, 2006 11:45 pm
Posts: 3
la_tengo_como_burro wrote:
1) Sound is so faint that I have to put the speaker in my ear to be able to listen to it.

2) Audio is out of sync with the video

I turned the volume all the way up in all the setting of ALSAMIXER and NOTHING


wow I have the exact same tuner card as this poster, and I am having the exact same problems.

Wish he would have posted the solution :)

I PM'ed him but he's not answering

Any ideas anyone? I'm tring the stuff the next poster said
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la_tengo_como_burro
 Post subject:
PostPosted: Wed Feb 08, 2006 12:38 pm 
Hi its me, the original poster... :D

I'll get them for you when I get home (i'm at work now), I have everything written down on a word document so in case my mythtv crashes I know how to get it back...
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la_tengo_como_burro
 Post subject:
PostPosted: Wed Feb 08, 2006 4:38 pm 
After you have the jumper cable plugged in between the Tuner card an the sound card "line in" inptut jack... do the following:


TO SET THE VOLUME LEVELS IN ALSAMIXER CORRECTLY


Do this at the shell screen:

$ amixer set Master,0 100%,100% unmute
$ amixer set PCM,0 100%,100% unmute
$ amixer set Line,0 75%,75% mute captur
$ amixer set Capture,0 100%,100% captur
$ su
# alsactl store
# exit
$

Quote:
That takes care of setting the volume correctly, and the ALSA startup script will restore the volume after a reboot. If you find that your sound is distorted, it's possible that the levels in the above examples are too high for your particular hardware combination. Try reducing the percentages by 5-10% and checking again. Once you're satisfied, re-run the alsactl store command.
You may also use the alsamixer program to set the volume. If you are using an ALSA version after 1.0.6, use alsamixer -V all . First, start alsamixer from the command line. You should start out on the "Master" volume control slider. Use the up and down cursor to set the master volume to around 75%. Next, use the left and right cursor keys to move around on the screen until you find the "Line" slider. Press SPACE to set it as the capture source, set the level to around 50-75% and press "M" to mute it. You can now press ESC to exit out of the alsamixer program. You can also have MythTV manage all volume and mute settings, but this will only affect the "Master" or PCM volume, not the capture volume. See the mythfrontend setup page for options.


There... That shold take care of it
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la_tengo_como_burro
 Post subject:
PostPosted: Wed Feb 08, 2006 4:54 pm 
The answer for the 2nd question regarding the out of sync audio...

You have to get a fast video card, I got me an NVIDIA FX5200, which is the one that everybody recommends, its cheap and it works out-of-the-box, knoppix pics it up and does everything for you. After that everything worked like clockwork. :wink:
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adamzap
 Post subject:
PostPosted: Wed Feb 08, 2006 9:27 pm 
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Joined: Thu Feb 02, 2006 11:45 pm
Posts: 3
success!

thanks so much
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