[linux-dvb] Distorted analog sound when using an HVR-3000

Darron Broad darron at kewl.org
Mon Nov 24 13:17:59 CET 2008


In message <617be8890811240346r3aae6f31rfab45804419bfade at mail.gmail.com>, "Eduard Huguet" wrote:

hi

>Nothing :(. The results are exactly the same: when I use the analog TV
>input, the sound is bad but understable, but somehow "high pitched" fro some
>reason.

okay. as it stands, analogue TV audio isn't affected by these changes
so no change here is expected. i could see about changing this if you
could live with mono only. however, this really would depend on whether
any of this works for you at all...

>When using s-video or composite (this, capturing sound from LineIn input)
>the sound is completely broken: I'm getting only crackling noise,
>ocassionaly disrupted by some fragments of which it should be the original
>input sound...

if this is the same problem as which has been addressed for analogue
input (LINE-IN) for me on both an hvr-1300 and hvr-4000 then you can try to
attenuate the input level even more to see if it improves things.

>This happens both in MythTV and when using mplayer, like i.e. using the
>following command line:
>
>mplayer tv:// -tv driver=v4l2:device=/dev/video0:norm=PAL-BG:\
>input=1:alsa:adevice=hw.1,0:amode=1:volume=50:immediatemode=0:buffersize=3
>
>Any ideas? I'm using a fresh copy of http://hg.kewl.org/v4l-dvb/ repository.

The volume level can be from 0 to 63 try something even lower (10).
If the volume= option doesn't work as anticipated then
try v4l2-ctl -d /dev/video --set-ctrl=volume=XX as well.

We can look at other things if you have the time for it, e-mail me off-list
and we can look work something out.

cya

--

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{:)==={ Darron Broad <darron at kewl.org>
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