After removing a cue it seems to be removed from the cues list but still displays within the html5 video. Is there a way to refresh the textTrack after removing one? I am able to add additional cues but not remove them.
var video = document.getElementById("vid1");
var track = video.textTracks[0];
track.mode = "showing";
var cue = new TextTrackCue(1.121,3.121,"test1");
cue.id = "cue1";
track.addCue(cue);
//some time later
track.removeCue(track.cues.getCueById(cue.id));
Edit: Internet Explorer browser, I'm able to use VTTCue's with other browsers and those remove with no issues.
Edit2: Upon further investigation I found that this is happening if the cue that I want to remove is active at the time that I am removing it. When that is the case, it seems to remove from the cues list but never stop displaying from the video. I am now thinking a possible solution is to force seek a different time in the video then remove, then seek back to the previous position. Does anyone know if there's a way to hide the caption first before I remove it to avoid having to seek?
I noticed there is a "mode" property of tracks which can be set to 0=disabled, 1=hidden, 2=showing. I found setting the mode to hidden on the line before removing a cue solves the problem.
track.mode = 'hidden';
removeCue(track.cues.getCueById(cue.id));
track.mode = 'showing';
Related
Thank you for looking at my question. Fiddle is HERE.
I am trying to implement an audio player for many songs on a page. This is using JQueryUI Slider and HTML5 Audio, with one Audio element and multiple sliders.
The problems right now are:
The slider does not animate with the audio.
The slider does not seek to the audio.
previously, when both of the above WERE working, once you chose a spot in the song, the slider would no longer animate.
I have created function to rebindSlider() when a new song is clicked. Inside this function, two things happen: a) the new slider is created, with slide and stop listeners defined, and b) the new slider is bound to the timeupdate event on the audio element for the new song. I feel like this should be all that I need, but the slider does not bind, and an undefined error can be seen when you try to drag the slider.
Using a single slider, and a single audio element, I have gotten this 90% the way there; as soon as I introduced multiple divs for the sliders though, problems started occurring.
Here is the code for rebindSlider:
function rebindSlider(sliderDiv) {
var createSeek = function() {
sliderDiv.slider({
value: 0,
step: 1,
orientation: "horizontal",
range: "min",
max: audioPlayer.duration,
animate: true,
slide: function() {
manualSeek = true;
},
stop: function(e, ui) {
manualSeek = false;
audioPlayer.currentTime = ui.value;
}
});
};
createSeek();
$(audioPlayer).bind('timeupdate', function() {
if (!manualSeek) {
sliderDiv.slider('value', audioPlayer.currentTime);
}
});
}
Further description is below.
There is a list of songs included on the page. Each song has a containing div, within which is an <a> that contains meta data (absent in the fiddle), as well as a div designated for the audio seek slider. There is a single audio element on the page, which has its source re-loaded as you click through the songs.
When a song is clicked, I would like to destroy the sliders bound to the playing audio (if necessary), and bind the new slider for the clicked song to the audio player.
The closest I have gotten was to have the slider 1) begin animating when the song plays 2) dragging of the slider moved to a different position in the song. Once the slider had moved though, it no longer animated. After a refactor, the slider no longer works, and though I could go to a previous commit to get the working code, the refactor was so drastic that I would prefer to present the current, non-working code, as it better represents what I would like to end up with.
Reasoning, and additional information.
I am making a web app, for which I have a concept for an audio player that I would rather build myself than modify anything that I have come across. That being said, if you know of something that I can implement, I would love suggestions.
The idea sounds simple enough, and most of it is done, but there is a very crucial part of it that I am having trouble with, which is setting up the slider to animate with, and seek to the desired spot in the audio track, and to be able to rebind a new slider to the audio when a song is clicked.
There are a few changes needed to get the slider working correctly. I'll cover them each, in order that they apply.
Invalid Slider Max Value
The first issue is that the slider's max value is set to the audioPlayer.duration, which would normally be all well and good, except that the HTML5 audio player loads the audio assets asynchronously. What this means is that even though you might have loaded the audio prior to setting the slider, the audio asset may not be loaded yet, and the audioPlayer.duration may be invalid (likely NaN).
Simply remove the max key (and value) from the slider initialization, and this will work. Et viola! The slider moves!
One caveat: the slider defaults to a max value of 100 units, and the duration of the audio is a little over 25 seconds, so the song finishes playing when the slider is 1/4th of the way along. We can set the max key to 25 (seconds), but that's a little inelegant, and wont work if we change the audio to use a different source.
Set the Slider Max Value
Capturing the audioPlayer.duration must be done be handling an event, once the asynchronous load has completed. Javascript provides such an event: onloadedmetadata. Let's install an event handler, and make this work:
audioPlayer.onloadedmetadata = function() {
$(".slider").slider("option", { max: Math.floor(audioPlayer.duration) });
};
Now, what this does is set the slider's max to the audioPlayer.duration once the audio asset has loaded. Actually, this is currently setting the max value for ALL of the sliders, but that shouldn't be a problem, since they're all hidden. If you have a very large number of songs, there might be a bit of a delay, and you may want to find the specific slider to update.
Smooth Sliding
Now, you may notice after these changes that the slider is somewhat jumpy. It pauses for a second, then jumps, then pauses, etc. This can be fixed very easily, by changing the step key to 0.1 in the slider initialization, like so:
sliderDiv.slider({
value: 0,
step: 0.1,
orientation: "horizontal",
The time updates occur every 50 to 250 milliseconds, but the slider could only move in 1-second increments. Now, with 1/10th of a second increments, the slider will move more smoothly. You can decrease that slightly if you like, but don't make the number too small; 0.01 is the practical lower bound.
Update the End-of-Play State
When the song has finished, the "Play" button is left in play state, even though there's no longer anything playing. There's an event for that, as well: onended. We'll use that event to update the UI, so that the user doesn't get confused:
audioPlayer.onended = function() {
playButton.removeClass('fa-pause-circle-o');
playButton.addClass('fa-play-circle-o');
};
Now, when the song finishes, the Play button will go back to the "play" state, and the user will know that clicking on it will play the song.
Refactor Play Button State
Since there are now 3 places that update the state of the Play button, and this involves duplication, we can refactor the state handling. This function will definitively set the state of the Play button:
function setUIState() {
if (audioPlayer.paused || audioPlayer.ended) {
playButton.removeClass('fa-pause-circle-o');
playButton.addClass('fa-play-circle-o');
} else {
playButton.removeClass('fa-play-circle-o');
playButton.addClass('fa-pause-circle-o');
}
}
Now, calling it from the other functions, you end up with the onended event handler:
audioPlayer.onended = function() {
setUIState();
};
The changeUI function:
function changeUI(selectedSong) {
setUIState();
var sliderDiv = selectedSong.parent().find('.slider');
rebindSlider(sliderDiv);//Bind the desired slider
$('.slider').hide(); //Hide all sliders
sliderDiv.show();//Show only the desired slider
}
And, the Play button click handler:
$(".playButton").click(function() {
if (audioLoaded === true) {
if (!audioPlayer.paused) {
audioPlayer.pause();
} else {
audioPlayer.play();
}
setUIState();
} else {
alert("Please click a song");
}
return false;
});
This makes the UI state management for the button simple to deal with, and keeps the state from creeping out through the app. You can already see how the refactored code is noticeable clearer and will be easier to maintain. Plus, as a bonus, we got to use the cool audioPlayer.ended attribute, which you don't see used much.
But Wait, There's More!
With the changes above, you're well on your way to having a very functional audio player. But that's certainly not the end of the line for feature functionality. There's always room to grow!
I've create a jsFiddle that includes all of these changes, as well as a few other mods to the original code. You can find the most recent version at: https://jsfiddle.net/mgaskill/mp087adp/. Additional features are likely to keep popping up, but the jsFiddle already includes these additional features:
Volume control (slider)
Time display
Dynamically generated HTML for audio controls (keeps the HTML simpler)
We've been using the CreateJS suite for a while now, but have just realised that our audio is not working on IOS9. Unfortunately we only have one IOS9 test device, running IOS9.2.4, but are getting mixed results with audio playback.
The rough process I'm using is;
Preload all assets (scripts/images/audio) via PreloadJS
Construct an initial splash screen in EaselJS, including a start button
Continue with the main content
It would be advantageous to be able to preload all audio before presenting that splash screen. The splash screen was added initially to allow audio to play on mobile Safari, with an empty sound played on click. This does of course work for IOS7/8, but not for 9.
I've created this test case on codepen as an attempt to track down the issue and try some options.
Codepen sample
HTML
<p id="status">Hello World</p>
<canvas id="canvas" width="200" height="200"></canvas>
JS
var canvas, stage, rect;
function init() {
canvas = document.getElementById('canvas');
canvas.style.background = "rgb(10,10,30)";
stage = new createjs.Stage("canvas");
createjs.Touch.enable(stage);
rect = new createjs.Shape();
rect.graphics.f("#f00").dr(50,75,100, 50);
rect.on("mousedown", handleStart, null, true);
rect.on("touchend", handleStart, null, true);
//rect.on("click", handleStart, null, true);
stage.addChild(rect);
stage.update();
$('#status').text("Touch to Start");
createjs.Sound.initializeDefaultPlugins();
//createjs.Sound.alternateExtensions = ["ogg"];
createjs.Sound.registerSound("https://www.freesound.org/data/previews/66/66136_606715-lq.mp3", "ding1");
}
function handleStart(event) {
createjs.WebAudioPlugin.playEmptySound();
$('#status').text("Touch to Play");
rect.graphics._fill.style = '#0f0';
rect.removeAllEventListeners();
rect.on('click', handlePlay);
stage.update();
}
function handlePlay(){
createjs.Sound.play("ding1");
$('#status').text("Playing");
}
init();
Apologies for the lack of ogg version, was struggling to get test files to load x-domain.
With this, audio partially works for us on IOS9. If we leave clicking the red rectangle (figure start button) and leave it ~20 seconds, then click the green button no audio plays. If we click it immediately, audio plays fine.
I have been reviewing this bug/thread and attempting to follow Grant's suggestions. I gather SoundJS v0.6.2 now automatically attempts to play the empty sound appropriate when plugins are initialized, however moving the initializeDefaultPlugins and registerSounds calls into the handleStart function appears to make no difference. If I'm understanding the issue correctly, calling the WebAudioPlugin.playEmptySound method should be sufficient?
Have also been looking at the event binding, trying mousedown/touchend instead of click, but the result is the same with the 20 second wait. Event also appears to fire twice, although I could probably dig deeper into that if I could get it to work correctly.
I'm aware of the Mobile Safe Approach article aimed at this issue, but the need for a namespace at this level would mean a substantial rewrite of our existing content. Could someone perhaps advise if it is completely necessary to take this approach? I'm under the impression it should be feasible by correctly playing some empty audio within that initial handler.
Can't actually get the main project to this point, but if I can get a working example perhaps I'll be a step closer.
Any thoughts would be appreciated!
The Mobile-safe tutorial is not really relevant anymore since the updates in 0.6.2. It will likely be updated or removed in the near future.
You should never need to initializeDefaultPlugins(), unless you want to act on the result (ie, check the activePlugin before doing something). This method fires automatically the first time you try and register a sound.
The playEmptySound is also no longer necessary. SoundJS will listen for the first document mousedown/click, and automatically do this in the background.
touch events are not directly propagated from the EaselJS stage, but are instead turned into mouse events (touchstart=mousedown, touchmove=mousemove, touchend=pressup/click)
Based on this, you should be able to play sound once anywhere in the document has been clicked, regardless of whether you listen for it or not.
That is not to say that there isn't a bug, just that the steps you are taking shouldn't be necessary. I did some testing, and it appears to work in iOS9. Here is a simplified fiddle.
https://jsfiddle.net/lannymcnie/b4k19fwc/ (link updated Dec 3, 2018)
I have and audio that is being played and I want to stop it from playing once the user clicks on a button. I have tried popcorn.mute(), but it does not give the result I want. I want something like popcorn.stop();
If you want to really destroy the video, you need to make sure that a) it's not playing and b) there are no references to it anywhere in memory, including the DOM. That way, the Javascript engine can garbage-collect it. Just to be extra thorough, we'll clear out the src.
var video = popcorn.media; //grab a reference to the actual video element
//make sure it's not playing
video.pause();
//clean up popcorn
popcorn.destroy();
popcorn.media = null; //popcorn should probably do this in destroy, but it doesn't
//clear the src, Make sure it's no longer using the network.
video.src = '';
video.load();
//remove from the DOM. You won't see it anymore.
if (video.parentNode) {
video.parentNode.removeChild(video);
}
You'll also want to clear any other references you may have to the video, and it probably couldn't hurt to remove any event listeners you may have added, whether directly on the video element or through Popcorn.
I'm wondering how to stop the MediaElement.js player at the end of the video. I wondered how to stop the mediaelement.js player at the end of a video. I was hoping to hold on the last frame and not rewind to show the first frame as it does now.
Is it possible to change this behaviour?
I wrote a fix for this problem and John merged in version 2.10.2.
There is now an option "autoRewind" that you can set to false to prevent the player from going back to the beginning.
The eventlistener is not added and there is no more need to remove it.
$('video').mediaelementplayer({
autoRewind: false
});
I believe that the default behavior of the <video> element is to go back to the beginning so you'd just need to override this by listening for the ended event.
var player = $('#myvideo').mediaelementplayer();
player.media.addEventListener('ended', function(e) {
player.media.setCurrentTime(player.media.duration);
}, false);
Hope that helps!
Probably the best solution is not to be afraid and remove the "rewind-to-start-on-video-end" handler from mediaelement source.
If you go into the source code for mediaelement and search for "ended", you'll eventually see, that rewinding after reaching end of the video is actually done deliberately by mediaelement.
If you want to remove that functionality feel free to just remove that handler for "ended" event from mediaelement source. That solves all the problems, including flickering between last and first frame, mentioned in some other answers to this question.
The code in John Dyer's answer didn't really work for me either for some reason. I was however able to get this version working...
var videoPlayer = new MediaElementPlayer('#homepage-player', {
loop: false,
features:[],
enablePluginDebug: false,
plugins: ['flash','silverlight'],
pluginPath: '/js/mediaelement/',
flashName: 'flashmediaelement.swf',
silverlightName: 'silverlightmediaelement.xap',
success: function (mediaElement, domObject) {
// add event listener
mediaElement.addEventListener('ended', function(e) {
mediaElement.pause();
mediaElement.setCurrentTime(mediaElement.duration);
}, false);
},
error: function () {
}
});
videoPlayer.play();
The only problem I'm having - which is very frustrating, is it is flickering between the LAST and FIRST frames in Chrome. Otherwise, it works as expected in Firefox and IE...
This problem i faced when playing audio files
The problem is in the play, when you pause your player the file will stop but before resuming you have to decrease the current time of the player by any value in your case you may decrease it by a frame maybe
after setting your source ,loading your file and pausing, then
myplayer.player.play();
var currentTime = myplayer.player.getCurrentTime();
myplayer.player.setCurrentTime(currentTime-0.1);
myplayer.player.setCurrentRail();
I've got a page with links to MP3s, when the link is clicked I use javascript to show a small Flash player (NiftyPlayer) under the link. When a different link is clicked, the old player is hidden and the new player is revealed.
The player auto-starts when the element is shown, and auto-stops when hidden - in Firefox.
In IE it will only auto-start and NOT auto-stop. This is what I would like to solve.
This is an example HTML with link and player
Misunderstood What You Said
<div id="player662431" class="playerhide"><embed src="http://www.example.com/shop/flash/player.swf?file=/mp3/Beat The Radar - Misunderstood What You Said.mp3&as=1" quality="high" bgcolor="#000000" width="161" height="13" name="niftyPlayer662431" align="" type="application/x-shockwave-flash" swLiveConnect="true" pluginspage="http://www.macromedia.com/go/getflashplayer"></embed>
Here is the javascript (I've got jQuery installed to let me hide all the open players on this page apart from the new one)
function toggle_visibility(id) {
$('.playerhide').hide();
var e = document.getElementById(id);
e.style.display = 'block';
}
I think what I need to do is start the player manually with javascript (rather than using the autostart as=1 function in the URL string)
There is some javascript that comes with NiftyPlayer to allow this EG
niftyplayer('niftyPlayer1').play()
there is also a stop method.
I need some help with javascript - how do I add this call to play into my toggle_visibility function (it has the same unique ID number added to the name of the player as the ID of the div that's being shown, but I don't know how to pull this ID number out of one thing and put it in another)
I also would like to be able to do
niftyplayer('niftyPlayer1').stop()
to stop the audio of the previously running player. Is it possible to store the current ID number somewhere and call it back when needed?
Thanks for the help, i'm a PHP programmer who needs some support with Javascript - I know what I want to achieve, just don't know the commands to do it!
Thanks
If you assigned each niftyplayer object a classname, f.x. ".players", then you could loop through each player, like this:
function toggle_visibility(id) {
$(".players").each(function(){
playerId = $(this).attr('id');
if(niftyplayer(playerId).getState() == 'playing') {
//Stop the currently playing player
niftyplayer(playerId).stop();
//Hide the div that was playing
$("#" + playerId).hide();
}
});
//Start the new player
niftyplayer(id).play();
$("#" + id).show();
}
So what this actually does, is it loops through all the players on the website. It checks if the status of each player is equal to "playing", if it is, then it stops it and hides the div tags. Then it starts the new player and shows that div tag.
I think this does it. Try it out.
I have a much better solution after I noticed a very nasty bug / 'feature' when using Internet Explorer in conjunction.
I had noticed that in IE the pages were taking a very long time to load when I had a lot of hidden Nifty Players, I looked closer using Fiddler and found that each instance of NiftyPlayer was preloading the MP3 in full, rather than loading on demand as with Firefox and Chrome etc.
This meant that a page with 100 items (each item having up to 4 MP3s) took several minutes to load at times with obvious data transfer implications.
My solution which is rather simpler (but maybe clunkier) than Indyber's is to just use
function toggle_visibility(id,mp3location) {
// hide all players
$(".playerarea").html('');
// show clicked player
$('#' + id).html('<embed src=\"http://www.xxx.com/shop/flash/player.swf?file=http://www.xxx.com/mp3/' + decodeURIComponent(mp3location) + '.mp3&as=1\" quality=high bgcolor=#000000 WMODE=transparent width=\"161\" height=\"13\" align=\"\" type=\"application/x-shockwave-flash\" swLiveConnect=\"true\" pluginspage=\"http://www.macromedia.com/go/getflashplayer\" class=\"playerNew\">');
}
which works fine with IE, and also solves the problem of not being able to stop the players from playing in IE