qml change the resolution before camera capture picture

[neda]

Hi
I want to display video with low resolution and capture image with the camera's highest resolution.
I used this code but the image was captured from camera with low resolution.


var w=camera.viewfinder.resolution.width;
var h=camera.viewfinder.resolution.height;
setMaxResulotion();
camera.imageCapture.capture()
camera.viewfinder.resolution.width = w;
camera.viewfinder.resolution.height = h;

[anda_skoa]

What does setMaxResulotion() do?

If w/h are the low resolution values, have you tried setting them after the capture has been done?

Cheers,
_

[neda]

What does setMaxResulotion() do?
_

Set max Resulotion for camera.



If w/h are the low resolution values, have you tried setting them after the capture has been done?
_

Yes. I want after capture camera will have the same low resolution

1- camera ( low-resolution)
2- capture (take a photo from camera with highest resolution)
3-camera (the same low resolution in step 1)

video => low-resolution , imageCapture=>highest resolution

[anda_skoa]

Set max Resulotion for camera.

And you have verified that this works?



Yes. I want after capture camera will have the same low resolution
Have you tried setting these values after the capture has finished?

Cheers,
_

[neda]

And you have verified that this works?
_


function setMaxResulotion(){
var res = camera.supportedViewfinderResolutions();
camera.viewfinder.resolution.width = res[res.length-1].width;
camera.viewfinder.resolution.height = res[res.length-1].height;

for(var i=0;i<res.length;i++)
{
if(res[i].width>camera.viewfinder.resolution.width)
{
camera.viewfinder.resolution = Qt.size(res[i].width,res[i].height)
}
else if(res[i].width===camera.viewfinder.resolution.width){

if(res[i].height>camera.viewfinder.resolution.height)
{
camera.viewfinder.resolution = Qt.size(res[i].width,res[i].height);
}
}
}
}




Have you tried setting these values after the capture has finished?
_
I tried capture with highest resolution.
But I have this error when use "setMaxResulotion" function:

QCameraImageCapture error: "Camera not ready for capture"


var w=camera.viewfinder.resolution.width;
console.log("w1:"+w) //=> low resolution.width
var h=camera.viewfinder.resolution.height;
setMaxResulotion();//set highest resolution
console.log("w2:"+camera.viewfinder.resolution.width) //=> ok : highest resolution.width
console.log("h2:"+camera.viewfinder.resolution.height)//=> ok : highest resolution.height
camera.imageCapture.capture() // error : QCameraImageCapture error: "Camera not ready for capture"
camera.viewfinder.resolution.width = w;
console.log("w1:"+camera.viewfinder.resolution.width ) == > //output = qml: w1:-1
camera.viewfinder.resolution.height = h;

[anda_skoa]

Yes,



I tried capture with highest resolution.
But I have this error when use "setMaxResulotion" function:

QCameraImageCapture error: "Camera not ready for capture"

I am confused.
You are saying it works, but also saying it doesn't?

Btw, I think it is easier to just calculate the image size in your "set maximum" function and use that for comparison between offered resolutions.
E.g. something like


var largestSize = 0;
for(var i=0;i<res.length;i++) {
var currentSize = res[i].width * res[i].height;
if (currentSize > largestSize) {
largestSize = currentSize;
camera.viewfinder.resolution = Qt.size(res[i].width,res[i].height);
}
}






camera.viewfinder.resolution.width = w;
console.log("w1:"+camera.viewfinder.resolution.width ) == > //output = qml: w1:-1
camera.viewfinder.resolution.height = h;
What I meant was: don't do this after the call to capture(), do this once capture has finished.

Cheers,
_

[neda]

I am confused.
You are saying it works, but also saying it doesn't?
_

Excuse me
I mean, "setMaxResulotion" function works
And the camera is set to the highest resolution after this code:

setMaxResulotion();//set highest resolution
console.log("w2:"+camera.viewfinder.resolution.width) //=> ok : highest resolution.width
console.log("h2:"+camera.viewfinder.resolution.height)//=> ok : highest resolution.height



Btw, I think it is easier to just calculate the image size in your "set maximum" function and use that for comparison between offered resolutions.
E.g. something like


var largestSize = 0;
for(var i=0;i<res.length;i++) {
var currentSize = res[i].width * res[i].height;
if (currentSize > largestSize) {
largestSize = currentSize;
camera.viewfinder.resolution = Qt.size(res[i].width,res[i].height);
}
}



What I meant was: don't do this after the call to capture(), do this once capture has finished.

_

I update my code:

MyToolButton{
iconSource:"images/photo.png"
tooltip: "save photo"
onClicked: {
var res = camera.supportedViewfinderResolutions();
var largestSize = 0;
for(var i=0;i<res.length;i++) {
var currentSize = res[i].width * res[i].height;
if (currentSize > largestSize) {
largestSize = currentSize;
camera.viewfinder.resolution = Qt.size(res[i].width,res[i].height);
}
}
camera.imageCapture.capture()

saveImageFileDialog.open();
}
}


But I have still the same error.

QCameraImageCapture error: "Camera not ready for capture"

[anda_skoa]

Excuse me
I mean, "setMaxResulotion" function works
And the camera is set to the highest resolution after this code:

setMaxResulotion();//set highest resolution
console.log("w2:"+camera.viewfinder.resolution.width) //=> ok : highest resolution.width
console.log("h2:"+camera.viewfinder.resolution.height)//=> ok : highest resolution.height

well, the properties have the expected values, but I see that I was asking not precisely enough.
What I meant was "does it work", i.e. does the camera capture at the set resolution.

It seems it doesn't.

Does it work if you don't change the resolution?
If yes, does it work if you change to the first offered resolution?
etc.

Cheers,
_

[neda]

Thank you,
When I put "console.log" after change resolution of camera I see resolution of camera is correct(in application output window)


var res = camera.supportedViewfinderResolutions();
var largestSize = 0;
for(var i=0;i<res.length;i++) {
var currentSize = res[i].width * res[i].height;
if (currentSize > largestSize) {
largestSize = currentSize;
camera.viewfinder.resolution = Qt.size(res[i].width,res[i].height);
}
}
console.log("w2:"+camera.viewfinder.resolution.width) //=> ok : highest resolution.width
console.log("h2:"+camera.viewfinder.resolution.height)//=> ok : highest resolution.height


Then when this line of code runs I have this error:

camera.imageCapture.capture()
QCameraImageCapture error: "Camera not ready for capture"

[anda_skoa]

Thank you,
When I put "console.log" after change resolution of camera I see resolution of camera is correct(in application output window)

Is this some kind of unintentional double post?
I think all that information is already in comment #7

Cheers,
_

[neda]

Does it work if you don't change the resolution?
_
Yes. When I run just "camera.imageCapture.capture()", it work. If I submit capture button after change the resolution every thing is OK. But when I put "change the resolution of camera" before "camera.imageCapture.capture()", it does not work.

Button1 = > Change the resolution = > Is OK
Button2 = > Image Capture => Is OK . If Button2 = > Change the resolution and Image Capture : It does not work




If yes, does it work if you change to the first offered resolution?
_
First offered resolution of camera is highest resolution. (I change the resolution of camera to lower resolution in start of program).
Did you mean? If yes,it does not work.

var res = camera.supportedViewfinderResolutions();
camera.viewfinder.resolution = Qt.size(res[res.length-1].width,res[res.length-1].height);
camera.imageCapture.capture()

[anda_skoa]

Yes. When I run just "camera.imageCapture.capture()", it work. If I submit capture button after change the resolution every thing is OK. But when I put "change the resolution of camera" before "camera.imageCapture.capture()", it does not work.

Button1 = > Change the resolution = > Is OK
Button2 = > Image Capture => Is OK . If Button2 = > Change the resolution and Image Capture : It does not work

Ok, this is an important data point.
So what you are seeing is that changing the resolution within the same function that calls capture doesn't work but if you have two user interactions triggering them separately, even if immediately after each other, it works.

Maybe check if the camera status changes when you change the resolution.
If not you could try delaying the call to capture() with a timer.

Cheers,
_

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