Re: [Ekiga-list] Video resolution

[Bret Busby <bret busby net>]

On Thu, 7 Jan 2010, Eugen Dedu wrote:

> Date: Thu, 07 Jan 2010 19:16:48 +0100
> From: Eugen Dedu <Eugen Dedu pu-pm univ-fcomte fr>
> Reply-To: Ekiga mailing list <ekiga-list gnome org>
> To: Ekiga mailing list <ekiga-list gnome org>
> Subject: Re: [Ekiga-list] Video resolution
>
> Bret Busby wrote:
> On Wed, 23 Dec 2009, yannick wrote:
>
> > Date: Wed, 23 Dec 2009 11:48:42 +0100
> > From: yannick <sevmek free fr>
> > Reply-To: Ekiga mailing list <ekiga-list gnome org>
> > To: Ekiga mailing list <ekiga-list gnome org>
> > Subject: Re: [Ekiga-list] Video resolution
> >
> > Le mardi 22 décembre 2009 à 17:30 +0800, Bret Busby a écrit :
> > Hello.
> >
> > I am wondering what prospect exists, for the video resolution, and
> > thus the displayed video size on screen, to be increased?
> >
> > I have recently purchased a Logitech C300 webcam, which apparently has
> > video resolution of up to 1.3MP; 1280 x 1024, I think.
> >
> > The webcam came with access to a Logitech free videocall facility'
> > "Vid", which apparently (on this computer, anyway) allows for video
> > resolution of up to 640 x480, at 30fps.
> >
> > So, I am wondering whether any intent exists, for Ekiga to provide for
> > image resolution of 640 x 480, or, better, also, 800 x 600, or, even
> > better, also, 1280 x 1024, at 30fps.
>
> > The higher you can get with Ekiga 3.2.x is: 704x576 30fps
>
> > (This is 4CIF, see http://en.wikipedia.org/wiki/4CIF )
>
> Okay, now I understand; the video format used by Ekiga, is apparently
> for television screens, rather than for computers -
> ("CIF was designed to be easy to convert to PAL or NTSC standards. CIF
> defines a video sequence with a resolution of 352  288 like PAL Source
> Input Format, a framerate of 30000/1001 (roughly 29.97) frames like
> NTSC, with colour encoded using YCbCr 4:2:0."
> and
> "xCIF pixels are not square, instead having a native aspect ratio of
> ~1.222:1. On older television systems, a pixel aspect ratio of 1.2:1 was
> the standard for 525-line systems (see CCIR 601). On square-pixel
> displays (computer screens, many modern televisions) xCIF rasters should
> be rescaled horizontally by ~109% to 4:3 in order to avoid a "stretched"
> look: CIF content expanded horizontally by ~109% results in a 4:3 raster
> of 384  288 square pixels.").
>
> I assume that the 4CIF resolution, is what used to be named something
> like High Definition television, in the 4:3 analogue television format
> (now all television screens available in sizes bigger than 14"
> diagonally, are this silly widescreen format, that makes the pictures
> look like someone heavy has sat on them).
>
> So, is the 4CIF format available for Ekiga, and, how can a user select
> that resolution, to be used?
>
> I could not find a means of selecting different resolutions, in the
> facilities for configuring the Ekiga interface.
>
> Does a method or facility exist, whereby a user (one party to a call)
> selects a particular resolution, as a maximum possible resolution to be
> viewed by the user, and the user interface software or carrier software,
> then determines the lower common factor for the resolution selection
> between the parties to a call, and uses that lower common factor
> resolution, for the call, at each end involved in the call, so that, if
> one party to a call, sets the maximum possible resolution at 4CIF and
> another party sets the resolution at CIF, the CIF resolution gets used
> by the call, to optimise bandwidth usage (me sending video at 4CIF,
> isn't much use, if a receiver can view only CIF) and the call then
> progresses using the lower common factor resolution?

Hi,

You can set *your* resolution (the one you send, i.e. your local video)
in Preferences/Video.

Hello.

Thank you for your response.

However, ekiga 2.0.12 does not have that option visible.

ekiga 2.0.12 is the latest version available from the repository for 
Debian stable (Debian 5).

--
Bret Busby
Armadale
West Australia
..............

"So once you do know what the question actually is,
 you'll know what the answer means."
- Deep Thought,
  Chapter 28 of Book 1 of
  "The Hitchhiker's Guide to the Galaxy:
  A Trilogy In Four Parts",
  written by Douglas Adams,
  published by Pan Books, 1992

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