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Two SAA7134 TV Cards and sound over PCI bus



Hello List,


i read the list for a while, cause i'm intrested in understanding how
v4l work and just wanne learn something :)
i read this:

On Fri, 2006-02-10 at 08:36 +0100, Hoeschen, Markus wrote:
>This gives me /dev/dsp2 (TV card1) and /dev/dsp3 (TV card2) for the two
>audio sources. In this case sound is transferd through PCI bus not
>through any "external" cable (remember I've got 2 cards in the same PC).
i've got only one card (Hauppauge WinTV [card=10]), but also 2 dsp devices
---
Feb  8 23:07:16 cassandra kernel: [  456.342584] btaudio: registered
device dsp1 [digital]
Feb  8 23:07:16 cassandra kernel: [  456.346799] btaudio: registered
device dsp2 [analog]
---

after a few hours there's only dsp1 left, without any dmesg dsp2 left
for a walk or something.

when i try to get sounds over pci bus
(sox -r 32000 -sw -t ossdsp /dev/dsp1 -t ossdsp /dev/dsp)
it works fine, but its not syncron, it starts with ca. 1/2 sec delay and
everytime i zapp around the delay increase.

one night tv runs the whole night and when i wake up, there's a delay
around 5sec or something.

i've got a K7 1800+ / 512 / Geforce puter, so i think it cant be that,
also i try another interrupt and various kernel parameters noapic,
acpi=noirq, ... but it seems that isnt an interrupt problem.

so i wonder, why others could stream videos and i not :)
>Now I can use vlc to capture audio and video from this sources and
>stream it through my network.

does anyone got a hint for me ?

best regards
michael wilke

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