xf86-video-v4l

xf86-video-v4l

[Stefan Sassenberg]

Hello,

what does the xf86-video-v4l driver do? I think I know the purpose of 
xf86-video-<graphics_card> drivers, but I don't know what the -v4l does. 
How is it used?

Regards

Stefan

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Re: xf86-video-v4l

[CityK]

Stefan Sassenberg wrote:
> Hello,
>
> what does the xf86-video-v4l driver do? I think I know the purpose of
> xf86-video-<graphics_card> drivers, but I don't know what the -v4l
> does. How is it used?
>
> Regards
>
> Stefan


Hi, please note that this mailing list is pretty much deprecated in
favour of the Linux-Media Mailing List (LMML) -- many key individuals
have already left the building (i.e. unsubscribed and participate only
on LMML nowadays).

Anyway, in answer to your question:
* from the command line, type "man v4l"
Then supplement that info with the following points taken from the V4L2
API
(http://www.linuxtv.org/downloads/video4linux/API/V4L2_API/spec-single/v4l2.html):
*
http://www.linuxtv.org/downloads/video4linux/API/V4L2_API/spec-single/v4l2.html#id3069581
**
http://www.linuxtv.org/downloads/video4linux/API/V4L2_API/spec-single/v4l2.html#ftn.id3069581
*
http://www.linuxtv.org/downloads/video4linux/API/V4L2_API/spec-single/v4l2.html#xvideo

Re: xf86-video-v4l

[Domenico Andreoli]

hi,

On Wed, Sep 09, 2009 at 12:17:49AM -0400, CityK wrote:
> Stefan Sassenberg wrote:
> >
> > what does the xf86-video-v4l driver do? I think I know the purpose of
> > xf86-video-<graphics_card> drivers, but I don't know what the -v4l
> > does. How is it used?
> 
> Anyway, in answer to your question:
> * from the command line, type "man v4l"
> Then supplement that info with the following points taken from the V4L2
> API

i think he knows also what v4l is about. he was asking which kind of
support is given to X through this driver, something i'm also curious
to know.

cheers,
Domenico

-----[ Domenico Andreoli, aka cavok
 --[ http://www.dandreoli.com/gpgkey.asc
   ---[ 3A0F 2F80 F79C 678A 8936  4FEE 0677 9033 A20E BC50

Re: xf86-video-v4l

[Michael Krufky]

On Wed, Sep 9, 2009 at 8:53 AM, Domenico Andreoli<cavokz@gmail.com> wrote:
> hi,
>
> On Wed, Sep 09, 2009 at 12:17:49AM -0400, CityK wrote:
>> Stefan Sassenberg wrote:
>> >
>> > what does the xf86-video-v4l driver do? I think I know the purpose of
>> > xf86-video-<graphics_card> drivers, but I don't know what the -v4l
>> > does. How is it used?
>>
>> Anyway, in answer to your question:
>> * from the command line, type "man v4l"
>> Then supplement that info with the following points taken from the V4L2
>> API
>
> i think he knows also what v4l is about. he was asking which kind of
> support is given to X through this driver, something i'm also curious
> to know.
>
> cheers,
> Domenico

Domenico,

Try "man v4l" as CityK suggested -- you will find that he did in fact
answer the question appropriately.

-Mike

Re: xf86-video-v4l

[Domenico Andreoli]

On Wed, Sep 09, 2009 at 11:12:45AM -0400, Michael Krufky wrote:
> On Wed, Sep 9, 2009 at 8:53 AM, Domenico Andreoli<cavokz@gmail.com> wrote:
> > hi,
> >
> > On Wed, Sep 09, 2009 at 12:17:49AM -0400, CityK wrote:
> >> Stefan Sassenberg wrote:
> >> >
> >> > what does the xf86-video-v4l driver do? I think I know the purpose of
> >> > xf86-video-<graphics_card> drivers, but I don't know what the -v4l
> >> > does. How is it used?
> >>
> >> Anyway, in answer to your question:
> >> * from the command line, type "man v4l"
> >> Then supplement that info with the following points taken from the V4L2
> >> API
> >
> > i think he knows also what v4l is about. he was asking which kind of
> > support is given to X through this driver, something i'm also curious
> > to know.
> >
> > cheers,
> > Domenico
> 
> Domenico,
> 
> Try "man v4l" as CityK suggested -- you will find that he did in fact
> answer the question appropriately.

indeed :)

i saw the pointers to the V4L api reference and supposed he was
explaining what V4L is...

thank you,
domenico

-----[ Domenico Andreoli, aka cavok
 --[ http://www.dandreoli.com/gpgkey.asc
   ---[ 3A0F 2F80 F79C 678A 8936  4FEE 0677 9033 A20E BC50

Re: xf86-video-v4l

[Alex Deucher]

On Sun, Aug 9, 2009 at 4:15 AM, Stefan
Sassenberg<stefan.sassenberg@gmx.de> wrote:
> Hello,
>
> what does the xf86-video-v4l driver do? I think I know the purpose of
> xf86-video-<graphics_card> drivers, but I don't know what the -v4l does. How
> is it used?

It's an old Xv ddx that exposes v4l1 adapters as Xv adapters.  It was
useful about 8-10 years ago, but at this point it's pretty bit-rotten.

Alex

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