I am making an app where an photo is taken and sent to the server, but the files that get sent are of low quality. It seems that when I take a photo using iOS native camera app it come out as a very sharp picture, but when using PhoneGap it reduces the quality massively.
I have set the image quality to 100 etc:
function capturePhoto() {
// Take picture using device camera and retrieve image as base64-encoded string
navigator.camera.getPicture(onPhotoURISuccess, onPhotoURIFail, {
quality: 100,
destinationType: Camera.DestinationType.FILE_URI,
//destinationType: Camera.DestinationType.DATA_URL,
//destinationType: Camera.DestinationType.NATIVE_URI,
sourceType : Camera.PictureSourceType.CAMERA,
correctOrientation: true,
saveToPhotoAlbum: true,
encodingType: Camera.EncodingType.PNG
});
}
But still seems to give a real blurry image.
Has anyone else had this problem? I have also tried using the DATA_URL to get the base64 encoded image, but this makes the app go so slow that I couldn't get to a stage to send to the server.
Is there a way to use the original LOSSLESS file?
Thanks
function capturePhoto() {
navigator.camera.getPicture(onPhotoURISuccess, onPhotoURIFail, {
quality: 50,
destinationType: Camera.DestinationType.FILE_URI,
sourceType : Camera.PictureSourceType.CAMERA,
correctOrientation: false,
encodingType: Camera.EncodingType.PNG,
targetWidth: 1500,
targetHeight: 1500
});
}
Im not sure why mine wouldn't work before, but it may have been because I was trying it on my iPad? I can't quite remember if I had the same problem with my iPhone also at that time.
Also the way the imageURI is retrieved may have made a difference, not sure about that either, but here is my code to get the image URI:
function onPhotoURISuccess(imageURI){
$('#imagePreview img.smallImage').attr("src", imageURI);
}
And then just get the URI from the image when you want to send. It prety much exactly like all the examples but for some reason didn't work before.
Make sure you have your plugins using the latest version too. That's about it!
Related
I am trying to capture a screen image from a video, which src is on a different server. So far I got to blank image, which as far as I understand is expectable, because of the tainted canvas or CORS policy error if I give the video tag 'anonymous' crossorgin property. I am using html2canvas, but also tried and with simple canvas context like this:
let ctx = canvas.getContext('2d');
ctx.drawImage( video, 0, 0, canvas.width, canvas.height );
let image = canvas.toDataURL('image/jpeg');
and with html2canvas, trying multiple combinations of options with Vue proxy configurated to the server of the video:
let el = this.$refs.videoPlayer
el.setAttribute('crossOrigin', 'anonymous')
this.output = (
await html2canvas(el, {
allowTaint: true,
useCORS: true,
proxy: '/two',
async: true,
foreignObjectRendering: true,
})
).toDataURL()
Is there any workaround around this? Because I have it working with a local video and now this is quite unfortunate. Is it possible to first download the video on the user system and then play it in order to take the screenshot?
Edit:
The only working workaround I found is to download the video as Blob via axios and then use it, which works perfectly, but uses the user cache for the video.
I'd like to take a full resolution picture with nativescript camera module ... but i can't !
I know how to do that with cordova but not in nativescript :-( and all examples are with small res like 300x300.
const options = {
width: 300,
height: 300,
keepAspectRatio: false,
saveToGallery: true
};
I'm looking for something like "0x0" or no width and height options but if i try to put 4096x3072 (my camera resolution) the result is "out of memory".
Thanks
Try to use nativescript media file picker https://www.npmjs.com/package/nativescript-mediafilepicker Or nativescript camera plus https://market.nativescript.org/plugins/#nstudio%2Fnativescript-camera-plus for full screen camera.
I have a big problem when making a screen share demo between chrome browser depends on WebRTC.
Environment：MacBookPro macOS 10.13.3, chrome: 64.0.3282.119
In order to get screen media sourceId, I also make a chrome extention, the background-script.js code as follows:
var screenOptions = ['screen', 'window'];
......
chrome.desktopCapture.chooseDesktopMedia(screenOptions, port.sender.tab, onAccessApproved);
When get media sourceId in my html javascript, a request screen media as follows:
var constraints = {
video: {
mandatory: {
chromeMediaSource: 'desktop',
maxWidth: 1280,
maxHeight: 720,
maxFrameRate: 30,
minAspectRatio: 1.77,
chromeMediaSourceId: sourceId
}
}
};
navigator.mediaDevices.getUserMedia(constraints).then(gotLocalStream).catch(function (e) {
alert('getUserMedia() error: ' + e.name);
});
The problem comes: when I inspect WebRTC stats in chrome://webrtc-internals, I found the googFrameRateInput was very low (<=10) when I play a video in main display, while googFrameRateInput can reach 30 when a do nothing in main display.
googFrameRateInput
I also try this in windows chrome, googFrameRateInput can reach 24~30 even when play a video.
Why googFrameRateInput is too low in mac chrome?
Thank a lot.
Updating electron 6.0.2 solved the issue.
I want to show, on a site that accepts only bbcode, a snapshot of a section of an external site. This section is constantly changing so I want to know if there's a way to automatically take a snapshot and save it to any server as same image so it's always updating on the bbcode-only site. Any help?
Really sorry if it's a duplicate, I tried my best searching.
You can use phantomJS for doing it.
var webPage = require('webpage');
var page = webPage.create();
page.viewportSize = { width: 1920, height: 1080 };
page.open("http://www.google.com", function start(status) {
page.render('google_home.jpeg', {format: 'jpeg', quality: '100'});
phantom.exit();
});
PhantomJS
Not sure what would be causing this, but when I upload some images to my remote server via FileTransfer(), the images sometimes show up either sideways or upside down. However, when I view the images locally on the iPhone, they are positioned in the correct way.
For example, when I select an image like this to upload: http://sharefa.st/view/WBe2QNSK8r8z
It will turn out like this: http://sharefa.st/view/EWdW1Z4G8r8z
I am using the local path to transfer the file, so I don't understand why the image would rotate "randomly".
Here is my upload function:
function uploadPhoto() {
var options = new FileUploadOptions();
options.fileKey = 'file';
options.fileName = imgURI.substr(imgURI.lastIndexOf('/')+1);
options.mimeType = 'image/jpeg';
var params = new Object();
if(logged_in == true) {
params.unique_id = app_unique_id;
params.secret_key = user_secret_key;
}
options.params = params;
loadingStart();
var ft = new FileTransfer();
ft.upload(imgURI, 'http://' + remote_server + '/API/upload', uploadDetails, fail, options);
}
imgURI value looks like this:
file://localhost/var/mobile/Applications/<snip>/tmp/photo_015.jpg
Any insight is appreciated.
Thanks to Humanoidism pointing out that the issue was in fact with the iPhone, and the way it stored images, I was able to figure out a solutuion.
To upload photos in the correct orientation you must add the correctOrientation setting to the options array in getPicture(), and set it to true.
Here are two examples:
function capturePhoto() {
navigator.camera.getPicture(onPhotoDataSuccess, onFail, { quality: 30, correctOrientation: true });
}
function getPhoto(source) {
navigator.camera.getPicture(onPhotoURISuccess, onFail, { quality: 30,
destinationType: destinationType.FILE_URI,
sourceType: source,
correctOrientation: true });
}
The problem is not PhoneGap but iPhone. The iPhone was designed to be used as a wide lens camera. Turn the phone sideways when taking pictures or capturing video if you intend to view them on desktop. Your phone will display them correctly, because it "knows" how you took them, but the computer that you're viewing it on dosen't.
What you could do to prevent this is to rotate the picture before the upload. This is not a recommended fix but at least people on desktop computers will be able to see it. Though when viewing them on iPhone they'll be rotated - maybe a check for mobile devices wether or not to rotate the image could come in handy - but still again, not recommended.