On Thursday 31 December 2020 10:59:36 Celejar wrote: > On Wed, 30 Dec 2020 10:53:37 -0800 (PST) > > didier gaumet <didier.gau...@gmail.com> wrote: > > Le mercredi 30 décembre 2020 à 16:40:06 UTC+1, Celejar a écrit : > > [...] > > > > > 1) Why does VLC default to the lower resolution? Incidentally, I > > > see that Cheese also opens the camera by default at a lower > > > resolution - but a different one: 960x540. Why? Is this to save > > > space when recording? > > > > I don't know: one possibility is that either Linux or VLC/Cheese > > incorrectly detects the webcam resolution? Another possibility could > > be > > The manufacturer claims that it's 720p HD: > > https://www.lenovo.com/us/en/laptops/thinkpad/w-series/w550s/ > > > a marketing trick: an higher resolution is claimed through > > interpolation while actual optical resolution is lower. > > I don't know how to evaluate this. But still, if the camera is > reporting 720p, shouldn't the applications default to that? Do they > somehow figure out that the 720p mode is cheating and therefore ignore > it by default? > > > > 2) VLC's GUI doesn't seem to offer any way to set the resolution. > > > I see all kind of references on the internet to knobs to turn to > > > set resolution, but none of them seem available in my VLC when > > > using a v4l2 camera. Why? > > > > I use VLC from Buster. the following is the rough english > > translation of my VLC that is in french. > > > > - To set up the resolution of the webcam for a session and begin the > > session: Media>Open a capture device, then set up the capture mode > > to video camera, click on advanced options button and fill the width > > and height fields. - To set up the default resolution of the webcam: > > Tools>Preferences, then click on display parameters: all, then > > input/codecs>access modules>v4l, fill the width and height fields > > You're right, I was mistaken. The Advanced option do contain height > and width fields (parelleling the height and width CLI parameters I > mentioned). > > But I still think it's ridiculous that a) VLC doesn't provide a list > of supported resolutions to choose from, instead making the user > figure these out using other tools, and then enter the values manually > and b) hides these fields under the Advanced options, which, as I > noted, the documentation describes as "useful in some rare cases" > > Celejar
Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene>
