Cannot allocate memory

Cannot allocate memory

[EVENTYR]

Hi,

I'm executing test software which is in official website:


http://v4l2spec.bytesex.org/spec/capture-example.html

My system is a debian stable with kernel 2.6.24 (i'm trying with 2.6.18 too).


Software crash (stop) when i use USERPTR mode:

-u | --userp         Use application allocated buffers

Software returns:

"VIDIOC_QBUF error 12, Cannot allocate memory"

With other two modes (READ and MMAP) works fine, but i need that works with USERPTR mode, what is the problem?

Thanks a lot.






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Re: Cannot allocate memory

[Laurent Pinchart]

Hi,

On Thursday 04 September 2008, EVENTYR@terra.es wrote:
> Hi,
>
> I'm executing test software which is in official website:
>
>
> http://v4l2spec.bytesex.org/spec/capture-example.html
>
> My system is a debian stable with kernel 2.6.24 (i'm trying with 2.6.18
> too).
>
>
> Software crash (stop) when i use USERPTR mode:
>
> -u | --userp         Use application allocated buffers
>
> Software returns:
>
> "VIDIOC_QBUF error 12, Cannot allocate memory"
>
> With other two modes (READ and MMAP) works fine, but i need that works with
> USERPTR mode, what is the problem?

The driver you're using probably doesn't support the user pointer method. Not 
all drivers do. Why do you need that specific method ?

Best regards,

Laurent Pinchart

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