How to do:
Pre loading video on play
Change resolution
Change language
In multiple platforms I see these techniques used but I can't understand which api they use to do these things does anyone have an idea?
(Sorry for the ignorance I'm Junior developer)
If you are using HTML5 on a browser then there are a set of events which the HTML5 video playback generates at different stages and which you can register to monitor and then take whatever action you want - for example change language etc.
There is a really nice illustration of the various events and their values when a vide plays (at the time of writing) here:
https://www.w3.org/2010/05/video/mediaevents.html
It's worth noting that the type of features you are describing are usually built into a HTMl5 video player if it is on a website or a native player if it is on Mobile.
For example on a browser the open source DASH if player, https://reference.dashif.org/dash.js/latest/samples/dash-if-reference-player/index.html, will change resolutions for ABR streams and provide the user controls to change it manually and to set the langage.
On Android the open source ExoPlayer, https://github.com/google/ExoPlayer, provides similar functionality, and on iOS the built in media library https://developer.apple.com/documentation/avfoundation?language=objc, provides similar functionality.
To understand ABR streams and how and why they change resolutions this answer may help: (https://stackoverflow.com/a/42365034/334402)
Related
I can't watch Periscope without flash:
Since Periscope is pretty new and hype I find it a pity flash is required. My best guess then is that they simply can't.
But what is the technical restriction if one?
I can't say for sure about their own technical restrictions but they are serving the video in chunks of .ts files. It is not impossible for HTML5-based player to handle MPEG-TS streams so I can only assume this is a temporary solution.
Example of an HTML5 player handling .ts format is THEOPlayer. Also DailyMotion released an open-source JavaScript HLS streaming client. If others can already do it now, Twitter will do it soon.
Why Flash? :
It's an easy solution that works same on all browsers that it's installed onto so Edge, Chrome, Safari & Firefox etc so it will each give a consistent result to their user base without specific browser limitations (since it's a plugin).
Why assume temporary? :
First of all as you said it's still new (growing/developing). They have a few job openings for video programmers. This particular job opening requires "Ability to create an interface in HTML, CSS and JavaScript". They are currently using a Flash-based JW Player instead of a custom-made Twitter player. That will change in time.
After several years working with commercial and custom Flash video players, such as Flowplayer and jwplayer, I decided to open my work to html5. I like the idea of having a Flash impersonation of html5, so I tried medialements.js, video.js and jplayer. None of them are production ready and they all fail to meet my goal, which is playing a video on a webpage, desktop and mobile, live and vod.
Does anyone has a suggestion for a working web video player, apart from the commercial ones?
TIA
greg
I can get to what you are saying. Videojs is a leader in HTML5 video and considered state of the art by many though I think it falls short on some aspects especially for iOS/Android and Live streaming. Here is a list that compares some common actors of the market.
After much time playing with the different players available I decided to build my own HTML5 video jQuery based player. I learned so much while doing so and if you are planning on re-using it for your projects it will be much faster to tweak your own player rather than trying to build something up on a player someone else built. Now doing so requires you like JavaScript and are happy to deal with the cross browser testing. This article can give you a place to start. Digging in further would require you take on board the W3C spec.
Live streaming in HTML5 video is limited today: HLS for iOS and Android > 4.1 and coming in fast MPEG DASH (it has a JS lib for live and on demand here). If you want to cover a large audience for live video streaming you still need to consider flash.
HTML5 audio on mobile devices has many limitations and actually I would call them bugs.
My app implementing something like audio player.
Actually all it works fine for desktop but in mobile version I encounter many bugs and have to do many workarounds different for different browsers and os to get it work, and still it sucks.
I haven't dived into web audio api, but it seems to be designed for slightly different tasks.
So my question is, is it make sense (and is it possible?) to replace HTML5 audio with Web Audio API, if I need just to load files and play them (partly, sprites) just to avoid limitations and bugs of HTML5 audio?
I think you're probably going to find at least as many bugs or edge cases with Web Audio on mobile as you're seeing using the <audio> element. Plus, support for Web Audio on mobile platforms isn't great. If it were me, I'd be inclined to stick with <audio> unless you have a specific use-case that can only be addressed by the Web Audio API.
Actually, I'll disagree - if your goal is to play short snippets of sounds, particularly simultaneously - e.g., providing sound for a platform jumper game - Web Audio is going to be a lot easier to use, including on mobile. has issues managing multiple files/instances. On the other hand, if the problems you're running in to are due to decoding issues, or you're using mostly long files, it's not going to help, as Kevin and Brad said.
I recommend SoundJS which I develop, it takes a lot of the pain out of supporting audio on multiple devices. Basically it lets you write a single code base that works everywhere and already deals with edge cases where it can.
HTML Audio element implementation on mobile devices is really terrible, so if not SoundJS I would at least recommend switching to Web Audio which works well on iOS and Android Chrome but is not supported in Android Native browser.
idbehold's comment is accurate, the most common problem with mobile devices is having to play audio inside of a user initiated event (touch). I've developed a solution to this problem, shared in the Mobile Safe Approach tutorial.
Hope that helps.
Coursera has these interactive questions in the middle of their video lecture
how could I go about implementing this myself,
or better yet, does this feature exist for public use somewhere?
Furthermore, I'm trying to decide which HTML5 video player / platform to invest in and the key criteria would be feature-rich (so as to not reinvent the wheel / spend lots of time implementing video player features) as well as highly customizable (for those custom needs).
I.e. which player should I use to get the quiz up,
but in the near future I would also need to add the speed feature that Coursera has
I need Closed Captions support
and would like to overlay slides every now and then
plus all the expected features of switching between different source resolutions (360p, 720p etc), it should work in IE, Firefox, Chrome, Safari, Android and iOS native browsers etc
Candidates
In terms of customizability and feature-set, SublimeVideo seems to come on top, but I don't know when they will support subtitles.
Haven't researched Flowplayer much, would that be better for my purposes?
Jwplayer is good for all the standard features, and includes subtitle support, but I haven't really seen any plug-ins, aesthetic skinning aside, deep customization does not really seem to be their focus / strength?
Or videojs
Or something else yet ?
Flowplayer and Jwplayer are amazing players and you could do what you want, but in the free version you can't remove their branding. I try to stick to opensource projects you you don't worry about licenses.
I've done something similar as you need with Mediaelementjs. It supports all you need at the moment, and they will support the variable speed at some point on the future as announced in their website. However it has been like that for more than a year now since I started watching, so probably your "near future" is before their "coming soon".
I think your best free option will be Videojs. They also support all you need. For the variable speed there is this plugin.
Basically you set up a listener in the timeupdate event, and when it reaches the point that you need, you attach the quiz html to overlay the video area.
I have used flowplayer extensively. I'm just now starting to dive more into their new HTML5 version. The licensing for flowplayer is reasonable. It does have a plugin for doing subtitles and the cue point functionality works great. I also like that they have the Flash version that works well for fallback and I still use it for rtmp streaming.
I have built a video presenter with synchronized slides using the flash version which I'll be changing over to have an HTML5 version. I use it to produce speaker videos with Powerpoint presentations. Sometimes we have surveys (live) so I have also been planning to build in the option for a survey slide.
You can take a look at what I have built as an example here (it has some lose ends). Example synchronized video slide presentation (I have no affiliation with Flowplayer. WebVideoDesk, branded on the linked page, is a service I am planning to launch someday.)
How does one go about streaming video in HTML5 ? I can go with using a single browser of the latest version if I have to.I need to be able to start playing from any location of the movie even if the entire video has not been loaded by the browser.
WebRTC ?
I've already seen this question and no one has answered.
Does not allow the viewer to skip to the middle of a video in any
browser. They must watch the video straight through start to finish,
which is not ideal.
This is the main point for streaming.
Currently if you want to use pure HTML5 and work cross-browser you are limited to progressive streaming with the <video> element.
While that still does allow the user to skip ahead via the scrubber or programatically by setting the .currentTime there will still be some buffering while the browser re-loads enough content to be comfortable playing smoothly.
Solutions like Smooth Streaming, HLS do not work across browsers today so you would require a Flash or Silverlight plugin, though with MPEG-DASH being recognized by the W3C there is some hope for the future as samples like this demonstrate http://dash-mse-test.appspot.com/release-notes.html
For today however if you want to stick with an HTML5 solution and you have source in a format the works with the browser then you should be fine
Chrome has implemented the Media Source API in the mean time. Hoping the rest will follow.
http://www.w3.org/TR/media-source/
Abstract
This specification extends HTMLMediaElement to allow JavaScript to generate media streams for playback. Allowing JavaScript to generate streams facilitates a variety of use cases like adaptive streaming and time shifting live streams.