I am connecting my Nexus 4 to a projector - but the resulting image is trapezoidal due to keystone. I want to be able to control this using software such that the image that goes out of the android is already corrected for this problem (In such a case, the projection will get smaller for the wider edge of the trapezoid and will be equal to the narrow edge; the remaining area can be black pixels.) There are two things to do here - one is the actual algorithm for keystone correction, which I think I have found here - Algorithm for software keystone correction. Any other efficient algos? And the second is how to modify the displayed screen in android to the one I want to send (if I were somehow able to change the android screen resolution to a trapezoidal value!). I don't mind distorting the phone display as long as the projected display is good. Also, would prefer this for any running app, not necessarily my app. Thanks a ton!
Hi,
I'm trying to screen cast from a Nexus 4 to a large screen TV (using a PTV3000). I want to put the TV in portrait mode and have the screen case occupy the entire screen, however I don't seem to find a way to accomplish this. When the phone's orientation is vertical (portrait) it assumes the TV is in landscape orientation and the phone screen is displayed small in the middle of the TV with black space on the sides.
After doing some searching it seems that this behavior can only be changed with a custom ROM, however I haven't been able to pinpoint where in the AOSP tree this behavior can be changed. Any suggestions are much appreciated.
Thanks!
Full screen
mariusmuja said:
Hi,
I'm trying to screen cast from a Nexus 4 to a large screen TV (using a PTV3000). I want to put the TV in portrait mode and have the screen case occupy the entire screen, however I don't seem to find a way to accomplish this. When the phone's orientation is vertical (portrait) it assumes the TV is in landscape orientation and the phone screen is displayed small in the middle of the TV with black space on the sides.
After doing some searching it seems that this behavior can only be changed with a custom ROM, however I haven't been able to pinpoint where in the AOSP tree this behavior can be changed. Any suggestions are much appreciated.
Thanks!
Click to expand...
Click to collapse
Did you ever get the full screen to work?
So the phone clearly has the capability to do so, given some of the dual-camera effects it can pull off.
I'm a big fan of stereophotography (See here for examples of what I've been doing: https://www.instagram.com/binary_system/ ), and having a phone with two separated lenses has some huge potential, especially when trying to capture moving subjects (right now I have to do two separate photos). Yes they're pretty close together, but some tests I've done have shown that it works surprisingly well at least for close up objects.
Anyone know of a) any apps that can do this, or b) if the phone can actually support this outside of its own native camera app?
[Yes, obviously I'm aware you're going to end up with one wide angle photo and one close up. However....
If you crop the wide angle photo to the same extents as the normal photo, this still works, and still has good enough resolution for instagram etc.]
Hey,
So hoping someone can point me in the right direction here,
My use case is the following:
I will be using an android smart TV to feed into a projector. Normally it will be an 80" projection, however when I am watching network TV I would like to reduce the size of the projection to a smaller size (lets say 50").
So to do this I would like to be able to tell the Android TV to only 'draw' the bottom centre of the screen, so for example if the normal projection is 4k I would like to draw a 1080p picture in the bottom middle and have the rest of the picture essentially 'off'. An alternative would be to just send a black image to the rest of the picture but still only have the active part of the screen in the bottom middle.
Is this possible, and if so what should I be looking for?
bump
Bump :/
I would like you to check something that drives me mad with my new Oppo Reno 2. In camera settings, I always set video settings in 1080p and 60 fps. Whenever I change to bokeh effect or wide angle for example, when I untick one of them, values for camera reset to 1080p 30 fps. It´s annoying changing this every time I want to make a video. Even if I do not change anything and shoot a video in 60 fps non ultra stabilization mode, and get out of the camera app, a time later when I enter again, values for camera are changed to 1080 30 fps again. I do not know the reason why or because it is something about performance or battery saving or not.
I just would like you to check if this happens. Change settings to 60 fps and change to wide angle or do not change anything and do whatever you want with your smartphone and after a while, don´t know how much, enter again and see if it changes. Much appeciate it.
EDIT. I must add that it seems that setting main camera to 48 mg also resets to default after a while. What´s this?
Haha. Happens to me either.
I was like "what the hell, didn't I switched to 60fps the other day?"
Let's just hope that Color OS 7 will fix this little issue.
Thanks a lot mate. Thanks a lot for answering. It's a really great great beautiful stylish smartphone and I'm glad I'm not the only one facing that bug. Anyway, I will always stick on 1080p 60 fps through ultra stabilization button every time I use the video because I think it's incredible the result, too much to miss it. That's the trick I use.
I'm new with this Oppo, only two days and I'm getting used to it. And one thing around my mind is the aspect ratio of photos. The gorgeous screen invites me to take photos in full screen mode as the difference in quality seems not to be enormous and this full screen makes people astonish when they see a photo just taken at the moment in all its splendor without any black bars at both sides.
But I know the quality is 4000x1800 in full screen mode and 4000x3000 in 4:3 aspect. Do you prefer taking photos in one or other aspect ratio? The screen is so good that I don't want to miss anything at all. And as we can't yet use our personal preferences in settings such as 48 megapixels mode, which I'll stick if its solved by an update, which are your preferences when taking photos according to these two aspect ratios? And thanks again. Writing from Spain here.
Well, i'm no expert at all, but i'd say that 48mpx mode is the only mod i would not advise, as there's always some loss in terms of color.
Using full-screen mode or default 4:3 is probably based on personal taste. You're losing much information (as the photo is much narrower) and it can be harder to put everything you want in the frame.
Though, it looks very good in the phone's gallery indeed.
I'd probably go for using full screen if you watch your photos only on your phone, but 4:3 for a more versatile use.
Mates, absolutely solved everything with new update to Color 7. Camera settings will remain as our personal preferences. More intuitive camera options. Now it's perfect.
About using one or other aspect ratio in photos, I mean in terms of quiality, I don´t know what to do. I do not want to loose quality using full screenmode if that means that using 4.3 aspect ratio implies a better quality. But what I can tell is that versatility is also present in full screen mode because if we see photos on tv, it aproaches to that aspect ratio and there´s more space taken by the picture on screen. Making a photo report or video report also takes advantage of this ratio because when we use the programs to edit photos and make a photo compilation, it adapts to that kind of format. So the only dude here is quality. Perhaps is the same in both modes.