I'm looking for a way to find the status of a live stream through a VideoDisplay (or any other method really). I am interested to know if the stream is currently being published to or if the publisher has stopped. This is for a Flex/Flash ActionScript 3 project.
Is there a way to do this or is this ANOTHER oversight by adobe?
flex flash adobe adobe-flex actionscript
I've only found one solution, and that's using the NetStream object in combination with a video control.
The video control must be manually added to an
nsListen = new NetStream(nc);
nsListen.addEventListener(NetStatusEvent.NET_STATUS, nsListenHandler);
nsListen.play(streamname);
var v:Video = new Video();
v.attachStream(nsListen);
uicontrol.add(v);
Finally, the event status is returned in nsListenHandler:
private function nsListenHandler(e:Event):void
{
if(e is NetStatusEvent)
{
var nse:NetStatusEvent = NetStatusEvent(e);
if(nse.info.code == "NetStream.Play.Failed")
{
// Big error.
}
if(nse.info.code == "NetStream.Play.PublishNotify")
{
// Stream has just been published
}
if(nse.info.code == "NetStream.Play.UnpublishNotify")
{
// Stream has just been unpublished
}
trace(NetStatusEvent(e).info.code);
trace(NetStatusEvent(e).info.description);
}
}
Only this code wont do is tell you if a stream is already successfully being published to.
You can dig into NetStatusEvent events.
Check this live docs
Related
I m using MediaRecorder to record video. while third-party screen recorder is running at time media recorder through illegal state exception.
Everything works as expected if I kill the screen recorder app. Is there an elegant solution to allow my app to access the MediaRecorder even if another app is already using it?
Only one app at a time can access the microphone.
while screen recorder app is running and can access Microphone at the time I have tried to record video using inbuild native camera but can't record video due to microphone busy with another app.
Also, there is no standard way to inform another app that you want access to the microphone (so that they release the resources and let you access it).I would recommend you to simply inform the user that the microphone is currently not available because you can't do anything else or we can record video without audio.
Using below code, I have recorded video without audio.
private boolean prepareVideoRecorder() {
mCamera = Camera.open(findBackFacingCamera());
mediaRecorder = new MediaRecorder();
// store the quality profile required
windowwidth = getWindowManager().getDefaultDisplay().getWidth();
CamcorderProfile profile;
if (windowwidth > 2000) {
profile= CamcorderProfile.get(camid, CamcorderProfile.QUALITY_HIGH);
} else {
profile= CamcorderProfile.get(camid, CamcorderProfile.QUALITY_480P);
}
// Step 1: Unlock and set camera to MediaRecorder
mCamera.unlock();
mediaRecorder.setCamera(mCamera);
// Step 2: Set sources value i.e. CAMERA,SURFACE, or DEFAULT
mediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
// Step 3: Set all other values contained in profile except audio settings
mediaRecorder.setOutputFormat(profile.fileFormat);
mediaRecorder.setVideoEncoder(profile.videoCodec);
mediaRecorder.setVideoEncodingBitRate(profile.videoBitRate);
mediaRecorder.setVideoFrameRate(profile.videoFrameRate);
mediaRecorder.setVideoSize(profile.videoFrameWidth, profile.videoFrameHeight);
// Step 4: Seting output file
// mediaRecorder.setOutputFile(getOutputMediaFile(MEDIA_TYPE_VIDEO).toString());
File videoStorageDir = Const.getFileDirectory(MainActivity.this);
mediaRecorder.setOutputFile(videoStorageDir.getPath()+ File.separator + "/videofile.mp4");
// Step 5: Set the preview output
mediaRecorder.setPreviewDisplay(mvPreview.getHolder().getSurface());
mediaRecorder.setMaxDuration(42000); // for 40 second (you can set video recording limit here)
// Step 6: Prepare configured MediaRecorder
try {
mediaRecorder.prepare();
} catch (IllegalStateException e) {
releaseMediaRecorder();
return false;
} catch (IOException e) {
releaseMediaRecorder();
return false;
}
return true;
}
I mean, when a user chooses the video file from their system, have the web-page already show them the files they want to upload.
I'm already using image file to preview using FileAPI JS. The same I want to do with FileAPI JS for video file.
(So, It must be work within my client side)
Thanks & answers are appreciated :)
You can either use FileReader or createObjectURL. They'll both get the job done, but FileReader has slightly broader support in browsers.
createObjectURL will run synchronously and return a Blob URL, a short string referencing the file in memory. and you can free it up immediately after you're done using it.
FileReader will run asynchronously, requiring a callback, providing a Data URI, a much longer string representing the whole file. This can be very big and will be freed from memory in Javascript garbage collection.
Here's an example that first tries createObjectURL and falls back to FileReader. (Please provide your own error checking, etc.)
var video = document.getElementById('video'),
input = document.getElementById('input');
input.addEventListener('change', function (evt) {
var reader = new window.FileReader(),
file = evt.target.files[0],
url;
reader = window.URL || window.webKitURL;
if (reader && reader.createObjectURL) {
url = reader.createObjectURL(file);
video.src = url;
reader.revokeObjectURL(url); //free up memory
return;
}
if (!window.FileReader) {
console.log('Sorry, not so much');
return;
}
reader = new window.FileReader();
reader.onload = function(evt) {
video.src = evt.target.result;
};
reader.readAsDataURL(file);
}, false);
Working example here: http://jsbin.com/isodes/1/edit
Mozilla has a more detailed article with instructions on how to upload once you've got your file.
IE10 supports both, but IE9 supports neither, so you'll have to fall back to a regular form upload without a preview.
I googled but didn't find a post for Flex mobile..
All I want for now is display an user agreement popup from TabbedViewNavigatorApplication when the user uses the app for the first time
var agreementView: UserAgreement = new UserAgreement();
PopUpManager.addPopUp(agreementView, this,true);
PopUpManager.centerPopUp(agreementView);
but maybe more later.
Please help..
What i did in my desktop air app;
I guess this will work at a mobile app also.
Make sure you have write access;
open yourproject-app.mxml scroll down to the end of the document. In the section, uncomment the following permission:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
Now you can create files like for example an sqlite database.
At the applicationcomplete call the function checkFirstRun:
// functions to check if the application is run for the first time (also after updates)
// so important structural changes can be made here.
public var file:File;
public var currentVersion:Number;
private function checkFirstRun():void
{
//get the current application version.
currentVersion=getApplicationVersion();
//get versionfile
file = File.applicationStorageDirectory;
file= file.resolvePath("Preferences/version.txt");
if(file.exists)
{
checkVersion();
}
else
{
firstRun(); // create the version file.
}
}
public function getApplicationVersion():Number
{
var appXML:XML = NativeApplication.nativeApplication.applicationDescriptor;
var ns:Namespace = appXML.namespace();
var versionnumber:Number =Number(appXML.ns::versionNumber);
return versionnumber;
}
private function checkVersion():void
{
var stream:FileStream= new FileStream();
stream.open(file,FileMode.READ);
var prevVersion:String = stream.readUTFBytes(stream.bytesAvailable);
stream.close();
if(Number(prevVersion)<currentVersion)
{
// if the versionnumber inside the file is older than the current version we go and run important code.
// like alternating the structure of tables inside the sqlite database file.
runImportantCode();
//after running the important code, we set the version to the currentversion.
saveFile(currentVersion);
}
}
private function firstRun():void
{
// at the first time, we set the file version to 0, so the important code will be executed.
var firstVersion:Number=0;
saveFile(firstVersion);
// we also run the checkversion so important code is run right after installing an update
//(and the version file doesn't exist before the update).
checkFirstRun();
}
private function saveFile(currentVersion:Number):void
{
var stream:FileStream=new FileStream();
stream.open(file,FileMode.WRITE);
stream.writeUTFBytes(String(currentVersion));
stream.close();
}
private function runImportantCode():void
{
// here goes important code.
// make sure you check if the important change previously has been made or not, because this code is run after each update.
}
Hope this helps.
Greets, J.
Some you need to store whether the user has agreed to the agreement or not. IF they haven't agreed, then show it.
One way to do this would be to store a value in a shared object. Another way to do this would be to use a remote service and store such data in a central repository. I assume you'll want the second; so you can do some form of tracking against the number of users using your app.
I'm building an AIR application. Basically, what I'm looking to do is using navigateToUrl() to open a browser window, assign it a "name" and then, send variables to that newly opened window using the POST method.
EDIT : I need the window to be visible, this is why I absolutely need to use the navigateToUrl() function
I already know that I CAN'T DO something like this, that the AIR application will send the variables using the GET method...
var vars:URLVariables = new URLVariables();
vars.myVar = "Hello my friend";
var req:URLRequest = new URLRequest("http://example.com/my-page.php");
req.method = "POST":
req.data = vars;
navigateToURL(req);
Considering the amount of variables I have to send (multiline texts) I absolutely need to send my variables using the POST method else Internet Explorer is truncating the query string... Works fine in Firefox and Safari but unfortunately, we will always have (hope not!) to deal with IE..
So I was thinking something like this :
import flash.net.navigateToURL;
private var _timer:Timer;
protected function loadPage():void
{
var req:URLRequest = new URLRequest("http://example.com/my-page.php");
navigateToURL(req, "myPageName");
_timer = new Timer(3000, 1);
_timer.addEventListener(TimerEvent.TIMER, postVars);
_timer.start();
}
protected function postVars(event:TimerEvent):void
{
// I'm looking to send variables using the POST method to "myPageName"
// and possibly using URLVariables()??
_timer.stop();
}
Any idea Flex coders? THANKS!
I think what you're going to need to do is open up a page you have control over, then use ExternalInterface to inject the values into a hidden form and then execute the post operation in that page form.submit(), etc.
This can happen almost instantly and it will all appear very seamless to the end user.
I used Flash player 10, and Flex SDK 3.4. The code as followings:
// Following comes callbacks
function imageLoadOpenCallback(evt:Event):void
{
trace("in--open");
}
function imageLoadCompleteCallback(evt:Event):void
{
trace("in--load");
var fr:FileReference = evt.target as FileReference;
trace(fr.data);
}
function imageLoadErrorCallback(evt:IOErrorEvent):void
{
trace("in--ioerror");
}
function imageSelectCancelCallback(evt:Event):void
{
trace("in cancel");
}
function imageSelectCallback(evt:Event):void
{
trace("in -- select");
for (var i:int=0; i<frl.fileList.length; i++)
{
frl.fileList[i].addEventListener(Event.OPEN, imageLoadOpenCallback);
frl.fileList[i].addEventListener(Event.COMPLETE, imageLoadCompleteCallback);
frl.fileList[i].addEventListener(IOErrorEvent.IO_ERROR, imageLoadErrorCallback);
frl.fileList[i].load();
trace(frl.fileList[i]);
trace(frl.fileList[i].creationDate);
trace(frl.fileList[i].creator);
trace(frl.fileList[i].data);
trace(frl.fileList[i].name);
}
}
// Following comes UI handlers
function onAddPictures():void
{
var imageFilter:FileFilter = new FileFilter("Images", "*.jpg;*.png");
frl.addEventListener(Event.SELECT, imageSelectCallback);
frl.addEventListener(Event.CANCEL, imageSelectCancelCallback);
frl.browse([imageFilter]);
}
Only the imageSelectCancelCallback handler get called when I select some files in the dialog. But no load/open/io_error handler get called at all. I have Google some code example, in which it used FileReference instead of FileReferenceList. I don't know the reason, could you please help me?
In Air the fileReference objects in fileReferenceList do not fire the complete event when doing fileList[i].load(). In a Flex project it works fine. Adobe has not responded to bug reports on this appropriately.
Make sure in your compiler settings for flex, that you have at least 10.0.0 for "Use a specific version".
The main reason to use FileReferenceList instead of FileReference would be if you need to upload multiple files at once. If you only want to allow uploading one file at once, simply use FileReference.
Some clarification: imageSelectCallback(), and NOT imageSelectCancelCallback(), should get called when you select some files in the file browser AND click OK. imageSelectCancelCallback() is only called when you click Cancel.
Other than that, I never used the load() API, but I did use the upload(URLRequest) API. I am not sure what's your use case, but if you need to upload an image to a server, you should use the upload() method.
Speaking of upload events, I experienced some reliability issues when listening to Event.COMPLETE events, so I actually got better results listening to DataEvent.UPLOAD_COMPLETE_DATA.