Develop Reference

react-native-video doesn't load videos with a dynamic uri

I'm working on an app where one part of the process is shooting a video, then uploading it. I'm using react-native-video to display the preview after the user has finished recording, and react-native-camera for the capturing process. I also use react-navigation to move between screens.
Currently I can get to the preview screen and set the video component's source uri from Redux. However, there is no player to be seen. The uri is in format "file:///path/video.mp4", so apparently it should be in the app cache as intended.
First the user is presented with a camera, where s/he can capture the video.
const recordVideo = async () => {
if (camera) {
const data = await camera.current.recordAsync()
if (data) {
dispatch(saveVideo(data)) <-- CONTAINS THE URI
navigation.navigate(CONFIRM)
}
}
When stopRecording() is called, the promise obviously resolves and the video's URI will be dispatched to Redux. Afterwards we navigate to the "confirmation screen", where the user can preview the video and choose whether to shoot another or go with this one.
My problem is, I can't get that preview video to play at all. I think I've tried pretty much everything within my power by now and I'm getting really tired of something so seemingly simple being so overly difficult to do. I've gotten the video to play a few times for some odd reason, so it's not the player's fault. At best what I've achieved is show the preview once, but when you go back and shoot another, there's no video preview anymore. Also, the "confirm" screen loads photos normally (that were taken in the same manner: camera -> confirm), but when it's the video's turn, it just doesn't work. The video component's onError handler also gives me this: {"error": {"extra": -2147483648, "what": 1}} which seems like just gibberish.
PS. yes, I've read through every related post here without finding a proper solution.

Use Exoplayer
Instead of using the older Media Player on Android, try using the more modern Exoplayer. If you're on React Native 0.60+, you can specify this in your react-native.config.js by doing the following:
module.exports = {
dependencies: {
"react-native-video": {
platforms: {
android: {
sourceDir: "../node_modules/react-native-video/android-exoplayer"
}
}
}
}
};
I was experiencing the same issue and this solution worked for us. Note, we're only supporting Android 5+ so not sure if this will work with devices older than that.
https://github.com/react-native-video/react-native-video/issues/1747#issuecomment-572512595

Unity3D Webcam Autofocus Callback?

I want to take a picture from camera using Unity. Taking picture itself is not a big deal but I want more accurate one using autofocus callback method like in Android (onAutoFocus(boolean success, Camera camera)) So I can take a picture if callback returns success true. Is there any way to do it in Unity or I need some plugin for that? If there is one can somebody reference to it? Thanks a lot!

There is a plugin called Camera Capture Kit available on the assetstore that seems to be able to do what you want. We used the code to make theese features available on both Android as well as iPhone.
https://www.assetstore.unity3d.com/en/#!/content/56673
Camera Capture Kit comes with a plug-n-play camera app which enables Auto-focus - you can set the autofocus mode by calling .
CameraCapture.UnitySetFocusMode( webCamTextureReferance, FocusModes.Autofocus );
That will represent AVCaptureFocusModeAutoFocus and you should be able to trigger a callback for the focus event yourself by adding a piece of code like this in the function initCapture in the file Assets/Tastybits/Native/iOS/CameraCapture.mm :
[camDevice addObserver:self forKeyPath:#"adjustingFocus" options:flags context:nil];
Now, Camera Capture Kit doesn't give you a callback when focus is being done on iOS so you will have to add it yourself and calling back to unity yourself using SendMessage.
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context {
if( [keyPath isEqualToString:#"adjustingFocus"] ){
BOOL adjustingFocus = [ [change objectForKey:NSKeyValueChangeNewKey] isEqualToNumber:[NSNumber numberWithInt:1] ];
NSLog(#"Is adjusting focus? %#", adjustingFocus ? #"YES" : #"NO" );
if(adjustingFocus)
UnitySendMessage( "FocusController", "FocusChanged", "1" );
else
UnitySendMessage( "FocusController", "FocusChanged", "0" );
}}

getUserMedia frozen at first frame on Android Chrome

I have a working code on desktop browsers supporting getUserMedia Api, I can correctly see a video preview of my webcam in the div videoPreview. However, when running on Android device, this same code takes a picture with my front camera when I accept to share it in Chrome browser, then the preview keeps frozen on this first frame.
navigator.getMedia = (navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia);
navigator.getMedia(
// constraints
{video:true, audio:false},
// success callback
function (mediaStream) {
var video = document.getElementById('videoPreview');
video.src = window.URL.createObjectURL(mediaStream);
video.play();
},
//handle error
function (error) {
console.log(error);
}
)

For those encountering same problem : I fixed it by adding autoplay attribute to my <video> tag.
Was stuck with this for a while, I hope this will help someone else.

A colleague of mine and myself had the same issue today: working code didn't work anymore and the camera was frozen. Surprisingly (or not), a reboot fixed that problem.

locking screen orientation on mobile browser

I create a web page(chrome & safari) for mobiles (iphone & android), I want to lock the screen orientation in portrait mode.
Unlike mobile apps,there is no manifest file and activity as it a web page.
How to lock the orientation in mobiles using technologies (css/javascript/bootstrap/jquery) or any other?

I use a manifest file for my web app, which locks orientation for Chrome on my Android. For whatever reason, Safari gives their users the "right" to do this, but not the designers of the web app... Sort of feels like copyright infringement or something! ;) Don't get me started on Safari's disgraceful rewriting/rendering of input buttons!...
Anyways, back to the answer.
1) Include a link to your manifest within the head section of your page:
<link rel="manifest" href="http://yoursite.com/manifest.json">
2) Create your manifest file, "manifest.json"
{
"name":"A nice title for your web app",
"display":"standalone",
"orientation":"portrait"
}
3) Read more about manifests HERE

From my tests, assigning the screen.lockOrientation ( every browser versions ) to a var throw an illegal invocation error. Just use wind.screen.orientation.lock('landscape'); . It
EDIT: You can't use lock orientation on safari, cause it doesn't support fullscreen api at the moment http://caniuse.com/#feat=fullscreen . The lock orientation API NEED a fullscreen page to work. In Chrome, the window.screen.orientation.lock return a promise. So, AFTER you go fullscreen with the page, you can do something like this :
var lockFunction = window.screen.orientation.lock;
if (lockFunction.call(window.screen.orientation, 'landscape')) {
console.log('Orientation locked')
} else {
console.error('There was a problem in locking the orientation')
}
However, the lock orientation and fullscreen API are still experimental, not all browsers supports it.

The lockOrientation method locks the screen into the specified orientation.
lockedAllowed = window.screen.lockOrientation(orientation);
From the following code, you can check that orientation is locked or not.
var lockOrientation = screen.lockOrientation || screen.mozLockOrientation || screen.msLockOrientation;
if (lockOrientation("landscape-primary")) {
// orientation was locked
} else {
// orientation lock failed
}
see the following link, you will get idea from this.
https://developer.mozilla.org/en-US/docs/Web/API/Screen.lockOrientation

You can use:
screen.addEventListener("orientationchange", function () {
console.log("The orientation of the screen is: " + screen.orientation);
});
and
screen.lockOrientation('landscape');
Following: https://developer.mozilla.org/en-US/docs/Web/API/CSS_Object_Model/Managing_screen_orientation

html5 video tag to play full screen with Android

I'm creating a mobile site where I have a video I'd like to play when someone clicks on a link:
<div id="player"></div>
<?php echo $result_videos[$i]["camera_name"]; ?>
<script type="text/javascript">
function DoNav(theUrl)
{
// only add the player if it doesn't yet exist
if($('#myfileplayer').length == 0) {
var mydiv = $("#player");
var myvideo = $("<video id='myfileplayer' src='"+ theUrl + "' width='320' height='240' controls></video>");
mydiv.append(myvideo);
} else {
$('#myfileplayer').attr("src",theUrl);
}
}
</script>
With the iPhone, this works great, I click on video and it goes full screen. Android works as well but it requires you to click the video to play then click on the full screen. Is it possible to get to the full screen like iPhone just when you hit play?

This should work, with plain Javascript:
var myVideo = document.getElementById('myVideoTag');
myVideo.play();
if (typeof(myVideo.webkitEnterFullscreen) != "undefined") {
// This is for Android Stock.
myVideo.webkitEnterFullscreen();
} else if (typeof(myVideo.webkitRequestFullscreen) != "undefined") {
// This is for Chrome.
myVideo.webkitRequestFullscreen();
} else if (typeof(myVideo.mozRequestFullScreen) != "undefined") {
myVideo.mozRequestFullScreen();
}
You have to trigger play() before the fullscreen instruction, otherwise in Android Browser it will just go fullscreen but it will not start playing.
Tested with the latest version of Android Browser, Chrome, Safari.

I've given up on this. My conclusion is that the html5 video tag on Android devices blows chunks. It works in some devices but not on others. And there is no common criteria like 3.x or 4.x, it just seems to be random. I hope this gets better sometime soon especially since flash support is not longer existent.
Oddly sticking with a simple href seems to be the most consistent. You lose some controls but way better than the video tag...at least so far.

Have you checked out mediaelement.js?

Try something along the lines of:
document.getElementById('myfileplayer').addEventListener('play', function (e) { this.mozRequestFullScreen ? this.mozRequestFullScreen() : this.webkitRequestFullScreen ? this.webkitRequestFullScreen() : null; }, false);
Either that or maybe something along the lines of:
document.getElementById('myfileplayer').addEventListener('play', function (e) { this.webkitEnterFullscreen(); }, false);
webkitEnterFullscreen is the fullscreen method of a VIDEO element that is currently working on iOS. I'm not sure about support on Android devices.
mozRequestFullScreen and webkitRequestFullScreen are implementations of Mozilla and Google's FullScreen API which is used to activate full screen mode on practically any DOM element.
Hopefully that gives you at least a starting point to work from...

Most vendors require user interaction to go full screen, which is why natalee's answer doesn't work. For Andriod, you can call webkitEnterFullScreen() inside your anchor's click handler since it's a valid user interaction:
myvideo[0].webkitEnterFullScreen();
myvideo[0].play();
or
$('#myfileplayer')[0].webkitEnterFullScreen();
$('#myfileplayer')[0].play();
Note how I'm stripping jQuery's wrapper with [0]. It doesn't work otherwise.