Bret Busby wrote: > On Wed, 23 Dec 2009, yannick wrote: > >> Date: Wed, 23 Dec 2009 11:48:42 +0100 >> From: yannick <[email protected]> >> Reply-To: Ekiga mailing list <[email protected]> >> To: Ekiga mailing list <[email protected]> >> 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: 704x...@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. To my understanding, a common resolution is not useful. Your resolution and your partner's one can be different, I have seen it. So I think it's not useful to negociate it. -- Eugen _______________________________________________ ekiga-list mailing list [email protected] http://mail.gnome.org/mailman/listinfo/ekiga-list
