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From: najafa on 23 Jun 2010 09:29
>On Jun 21, 8:56=A0am, "najafa" <nabakah(a)n_o_s_p_a_m.gmail.com> wrote:
>> Hi, thanks for that but I need to write the usb detection code myself
>> because I have to save video data from a camera to it and be able to
read
>> the video data from the usb device on an LCD or other displays.
>
>There is a standard (class) for video over USB. If your camera
>follows the standard, there is code available for that:
>http://www.ideasonboard.org/uvc/. If it doesn't follow that standard,
>you'll either need to get details from the camera manufacturer or
>reverse engineer it.
>
> Steve
>

Thanks Steve. I will check it out.

---------------------------------------
Posted through http://www.EmbeddedRelated.com
From: najafa on 23 Jun 2010 09:33
>On Jun 21, 8:56=A0am, "najafa" <nabakah(a)n_o_s_p_a_m.gmail.com> wrote:
>> >On Jun 16, 2:09 pm, "najafa" <nabakah(a)n_o_s_p_a_m.gmail.com> wrote:
>> >> Hello,
>> >> Am a newbie in embedded designing and working on detection of usb
>> devices
>> >> and sending data mostly video to it for storage in Linux. Am using
the
>> c
>> >> language. I would like to know if anyone can help me with what I
need
>> to
>> >> know for my work and if there is a source code that can help me.
>>
>> >I can't read your brain wave for the moment. =A0Why don't you just try
>> >some of these:
>>
>> >mount /dev/sda1 /disk
>> >cp * /disk
>>
>> Hi, thanks for that but I need to write the usb detection code myself
>> because I have to save video data from a camera to it and be able to
read
>> the video data from the usb device on an LCD or other displays. Any
help
>> with that? =A0 =A0 =A0 =A0
>>
>> --------------------------------------- =A0 =A0 =A0 =A0
>> Posted throughhttp://www.EmbeddedRelated.com
>
>Do you want to send real-time video over USB, or just save and
>retrieve files containing video data? In any case, start here and then
>buy Jan's book:
>
>http://www.lvr.com/usb.htm
>
>--
>Joe
>
Hello Joe,

Thanks for the help. So grateful. Yes, I want to send real-time video over
USB while streaming from the camera. Any suggestions?

I will check out Jan's book. Been to her website already but never checked
her books.

Thanks again and all suggestions are most welcomed.

---------------------------------------
Posted through http://www.EmbeddedRelated.com
From: linnix on 23 Jun 2010 11:58
On Jun 23, 6:33 am, "najafa" <nabakah(a)n_o_s_p_a_m.gmail.com> wrote:
> >On Jun 21, 8:56=A0am, "najafa" <nabakah(a)n_o_s_p_a_m.gmail.com> wrote:
> >> >On Jun 16, 2:09 pm, "najafa" <nabakah(a)n_o_s_p_a_m.gmail.com> wrote:
> >> >> Hello,
> >> >> Am a newbie in embedded designing and working on detection of usb
> >> devices
> >> >> and sending data mostly video to it for storage in Linux. Am using
> the
> >> c
> >> >> language. I would like to know if anyone can help me with what I
> need
> >> to
> >> >> know for my work and if there is a source code that can help me.
>
> >> >I can't read your brain wave for the moment. =A0Why don't you just try
> >> >some of these:
>
> >> >mount /dev/sda1 /disk
> >> >cp * /disk
>
> >> Hi, thanks for that but I need to write the usb detection code myself
> >> because I have to save video data from a camera to it and be able to
> read
> >> the video data from the usb device on an LCD or other displays. Any
> help
> >> with that? =A0 =A0 =A0 =A0
>
> >> --------------------------------------- =A0 =A0 =A0 =A0
> >> Posted throughhttp://www.EmbeddedRelated.com
>
> >Do you want to send real-time video over USB, or just save and
> >retrieve files containing video data? In any case, start here and then
> >buy Jan's book:
>
> >http://www.lvr.com/usb.htm
>
> >--
> >Joe
>
> Hello Joe,
>
> Thanks for the help. So grateful. Yes, I want to send real-time video over
> USB while streaming from the camera. Any suggestions?

If you said that earlier, we would have been able to help you quicker.
Anyway, first check the list of cameras supported by the kernel.
Enable the driver supports in the kernel, as well as Linux for Video
features. There are special system calls for picture/video capture
available. Google for "Linux for Video".

>
> I will check out Jan's book. Been to her website already but never checked
> her books.
>
> Thanks again and all suggestions are most welcomed.        
>
> ---------------------------------------        
> Posted throughhttp://www.EmbeddedRelated.com

From: Nobody on 23 Jun 2010 18:01
On Wed, 23 Jun 2010 08:58:49 -0700, linnix wrote:

> Google for "Linux for Video".

The term you want is "Video4Linux" or "V4L".

From: najafa on 25 Jun 2010 08:22
>On Jun 23, 6:33=A0am, "najafa" <nabakah(a)n_o_s_p_a_m.gmail.com> wrote:
>> >On Jun 21, 8:56=3DA0am, "najafa" <nabakah(a)n_o_s_p_a_m.gmail.com>
wrote:
>> >> >On Jun 16, 2:09 pm, "najafa" <nabakah(a)n_o_s_p_a_m.gmail.com> wrote:
>> >> >> Hello,
>> >> >> Am a newbie in embedded designing and working on detection of usb
>> >> devices
>> >> >> and sending data mostly video to it for storage in Linux. Am
using
>> the
>> >> c
>> >> >> language. I would like to know if anyone can help me with what I
>> need
>> >> to
>> >> >> know for my work and if there is a source code that can help me.
>>
>> >> >I can't read your brain wave for the moment. =3DA0Why don't you just
=
>try
>> >> >some of these:
>>
>> >> >mount /dev/sda1 /disk
>> >> >cp * /disk
>>
>> >> Hi, thanks for that but I need to write the usb detection code
myself
>> >> because I have to save video data from a camera to it and be able to
>> read
>> >> the video data from the usb device on an LCD or other displays. Any
>> help
>> >> with that? =3DA0 =3DA0 =3DA0 =3DA0
>>
>> >> --------------------------------------- =3DA0 =3DA0 =3DA0 =3DA0
>> >> Posted throughhttp://www.EmbeddedRelated.com
>>
>> >Do you want to send real-time video over USB, or just save and
>> >retrieve files containing video data? In any case, start here and then
>> >buy Jan's book:
>>
>> >http://www.lvr.com/usb.htm
>>
>> >--
>> >Joe
>>
>> Hello Joe,
>>
>> Thanks for the help. So grateful. Yes, I want to send real-time video
ove=
>r
>> USB while streaming from the camera. Any suggestions?
>
>If you said that earlier, we would have been able to help you quicker.
>Anyway, first check the list of cameras supported by the kernel.
>Enable the driver supports in the kernel, as well as Linux for Video
>features. There are special system calls for picture/video capture
>available. Google for "Linux for Video".
>
>>
>> I will check out Jan's book. Been to her website already but never
checke=
>d
>> her books.
>>
>> Thanks again and all suggestions are most welcomed. =A0 =A0 =A0 =A0
>>
>> --------------------------------------- =A0 =A0 =A0 =A0
>> Posted throughhttp://www.EmbeddedRelated.com
>
>

Hi Joe,

The part of streaming real video from the camera has already been done with
Video4Linux. What is left is storing it whiles streaming on to the usb
device and playing it later on an LCD. Still reading Jan's book; but any
suggestions on this is still most appreciated.

Thanks.

---------------------------------------
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