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List:       mjpeg-users
Subject:    Re: [Mjpeg-users] Miro DC10+ and interference
From:       Andy Brown <andy () thebmwz3 ! co ! uk>
Date:       2007-01-02 17:40:31
Message-ID: 459A990F.3030001 () thebmwz3 ! co ! uk
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Thanks for the info Bernhard.

Bernhard Praschinger wrote:
> Hallo
> 
>> I'm using the DC10+ card, line input from a wireless camera. 
>> Unfortunately the wireless camera gets interference from other house 
>> devices (power supplies, microwave oven, etc), so sometimes the signal 
>> gets corrupted, and interference appears on its output.
>> This seems to de-stabilise anything capturing from the driver, and 
>> requires applications to be killed and restarted.
> When you view the video on a TV is it there also corrupted ?
> If yes you should find the problem an eliminate that.
> The problem is that the chipset can't sync any more to the frame, an
> will stop recording/delivering the data.

Yes, the corruption is also when viewed direct to TV or other output 
device, this is because the video is coming from a wireless camera that 
does get interference 'over the air' by other household items, which I 
can do nothing about.
So from what you explain, I cannot stop this from causing the device to 
stop delivering the data and require the device to be closed then re-opened?

> 
>> I'm trying to decide/find if this should be detected/handled in the 
>> software or kernel driver, so bear with me if this is nothing to do with 
>> the zoran kernel driver, please just tell me so!
> Is that problem also existent when you capture with lavrec from mjpegtools ?

Yes, you're right, it is with other programs too, hence my above comment.

Thanks for the info, if anyone has any patches that might help with this 
(I'd prefer it to just discard the frames silently, rather than need me 
to close the capture device), I'd give them a go!

Regards,
Andy






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