Re: saa7134 surveillance

[S P <xmisterhu@xxxxxxxxx>]

2009/6/2 hermann pitton <hermann-pitton@xxxxxxxx>:
> Hi,
>
> Am Dienstag, den 02.06.2009, 01:31 +0200 schrieb S P:
>> It has 4 chips only, and 2 D-SUB-like input, and it has four-four
>> coax(for video) and eight-eight RCA(for sound) cable per input.
>> If you wish, I could make a picture of it.
>>
>> Regards, Peter Sarkozi
>
> if it has only four chips, it can only support four inputs at once.
>
> The idea having 8 cameras at once is realized only in software then,
> by switching between at least two inputs per saa713x.
>
> The card=0 only has one input per saa713x chip, so you should add the
> second one for each. Have a look at saa7134-cards.c.
>
> In short, it likely is only a software and not a driver problem.
>
> Only if the TS/DVB input is used at once, the chips can handle two
> inputs at the same time. Some (likely unsupported) hardware mpeg/TS
> encoder there?
>
> Cheers,
> Hermann
>
>
>>
>> 2009/6/2 hermann pitton <hermann-pitton@xxxxxxxx>:
>> > Hi,
>> >
>> > Am Dienstag, den 02.06.2009, 00:53 +0200 schrieb S P:
>> >> I have 2.6.28 version kernel(The default with ubuntu jaunty). But I
>> >> had checked the documentation of 2.6.29 and saw that the v4l framework
>> >> redesinged a bit...so I have to compile the 2.6.29 kernel to see all
>> >> the cameras? Nice...but I will try.
>> >> Anyway: Thanks for the reply!
>> >>
>> >> Regards, Peter Sarkozi
>> >
>> > that won't help.
>> >
>> > We had always support for at least eight saa713x chips.
>> >
>> > Do you have four such chips on the board or eight?
>> >
>> > Cheers,
>> > Hermann
>> >
>> >
>> >> 2009/6/1 Håkon Alstadheim <hakon@xxxxxxxxxxxxxxxxxx>:
>> >> > S P wrote:
>> >> >>
>> >> >> Hi!
>> >> >> I have a surveillance card with saa7134 chips. It should be able to
>> >> >> see 8 cameras at a time, but there is only 4 video devices in /dev of
>> >> >> this card.
>> >> >> These devices are working fine, each device's channel 0(there isn't
>> >> >> any other channel of these devices) is an input for a camera.
>> >> >> So, how could I manage it to be 8 devices?
>> >> >>
>> >> >>
>> >> >
>> >> > Kernel-version ? Newer kernels allow you to set v4l subsystem to "allocate
>> >> > minor device numbers dynamically". This is supposed to allow more than 4
>> >> > devices on a single card, according to the help-text of the 2.6.29 kernel I
>> >> > just compiled.
>> >> >
>> >> > Caveat: All this is from memory, ~24hours old.
>> >> >
>> >> > --
>> >> > Håkon Alstadheim
>> >> > 47 35 39 38
>> >> >
>> >> >
>> >> >
>> >> > --
>
>
>
Ok, I had a look at saa7134-cards.c, and saw that the third
card(card=2 parameter) has 2 composite input, and voila, with that
parameter, I can see both camera with zoneminder(I think because it
don't have to see them continuously, just 5-15 fps, and could switch
between them fast), they are on channel 2 and 3 per chip.
Thanks for the really fast help, I appreciate it. Without you I would
have never thought of looking at that file.


-- 
Regards, Peter Sarkozi

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