Re: problems with 4 port video capture card with conexant fusion 878a 25878-132 chip, please help

[Daniel Glöckner <daniel-gl@xxxxxxx>]

On Sat, May 10, 2008 at 07:45:30PM -0400, Jody Gugelhupf wrote:
> [   60.601732] bttv0: using:  *** UNKNOWN/GENERIC ***  [card=0,autodetected]


>  Subsystem: 0x00000000


> At the current state when I try to view the inputs with e.g. xawtv i can change the "video source"
> (the current option in xawtv are called Television,Composite1,SVideo,Composite3) it shows me some
> very distored picture but also not all four resources, so what do i have to do to get it working,


Ok, you have two problems:

1. You live in a PAL country and your card can not automatically be detected
2. You want to watch four channels while your card has only one 878

Solutions:
1. As the subsystem ID is zero, you have to manually specify the card number.
When card is UNKNOWN/GENERIC, the driver does not program the PLL.
Usually cards are manufactured with a NTSC quartz, so programming the
PLL is necessary for PAL. Otherwise one gets a "very distored picture".
Try loading the bttv module with pll=28 . If you don't have a svhs
input, you may want to additionally set svhs=-1 to get color on the third
input.

2. There is no solution. The chip can capture only one input at a time.
If you switch inputs fast enough, you can achieve something below 6
frames per second. Your Windows application may have some clever logic
to switch inputs as soon as possible and in the optimal order. Using
only one field of a frame makes this significantly easier.

  Daniel

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