Introduction How to add CSS or JavaScript files to an Android/iOS project How to combat autoplay policies Playback issue with Internet Explorer 11 Why does fullscreen not behave as expected on iOS Why does the Network API not work on iOS devices Why doesn't Chromecast work when embedded in an iframe on iOS Why can't I select another video quality on iOS/tvOS?Is YouTube supported Why does the player load only one audio track (even though there are several in the manifest)Is it possible to see 360 degrees photo with THEOplayer Why the Visibility API does not work through an iframe on Safari and IE11 What is an impression How to know whether a live stream is playing Which error related events does the player expose Why did my subtitles stop working How does Media Engagement Index (MEI) affect Autoplay on Chrome What does the error message 'Unknown CDM error' mean What does the error message 'Something went wrong with Native playback' mean Why are not all response headers exposed Why does the currentTime seem off in my livestream & what can I do about it How to remove CORS restrictions from a reproduction stream Which network calls (or requests) does THEOplayer do Why does the playback not work when using the Chrome iPhone/iPad simulator What does the error message 'can only be initiated by a user gesture' imply? Can I still force the desired action How to remove unwanted CC track in iOS or Safari Known Chromecast Limitations in 2.61.1 Why do I get a gray play button in my Android WebView and how to remove it?MediaTek limitations How to use ProGuard with THEOplayer Android SDK Self-hosting and versioning of THEOplayer Does THEOplayer support EXT-X-DATERANGE Can clipping be used on a playlist Can timeline thumbnails be made available before playback start What are the benefits of preloading What are the player seeking and seeked events and when are they fired Can we use HLS or DASH ads How to change text in THEOplayer Change text when Airplaying ITP2.1 problems using THEOplayer Removing context menu/'Powered by THEOplayer v2...'What aspects of THEOplayer do we need to take into account to deploy a proper Content Security Policy (CSP)How can we avoid that the player keeps looking for chunks/segments if they are not found Can we show a custom message on 403 on mp4 Can we prevent UpNext feature from redirecting Is it possible to preload VOD content while the pre-roll is playing Why is my video not playing automatically Is it possible to have multiple player instances play at the same time Is it a problem if the viewer pauses a live stream for longer than the DVR window THEOplayer Features & Modules Chromecast on my webplayer does not work any longer despite no change in my implementation How to track network errors What is the support for Wowza How to use the CDN fallback/backup stream feature How to apply accurate buffering strategy How can I distribute 4K content?What is the collaboration between Azure Media Services and THEOplayer Is Portrait mode supported How to prevent screen recording The provided video source is incompatible with the license for this player Page and Source domains What does the error message “Something went wrong determining the initial period of the provided MPEG-DASH stream” mean Why is my PlayReady stream not working in Chromium Edge?Which subtitle and CC formats are supported on native Safari How to navigate through the documentation and resources How to create a (great) ticket How to investigate a ticket What are the limitations of AirPlay What are the Edgio challenges How to use the Media Session API How to use THEOplayer iOS SDK on an M1 mac Widevine CDM deprecation notice for old browser versions

THEOplayer Features & Modules

The THEOplayer SDK consists of modular features.

When building an SDK (i.e. license), you can specify which features are enabled. Only a subset of features are enabled by default, such as "HLS", "MPEG-DASH", "UI", "Chromecast", "Airplay", "Ads", and "Text Track Rendering".

This modular approach allows you to optimize the file size of your THEOplayer SDK.

How do I enable or disable certain features?

You can do this through our Portal.

If you're creating a new SDK, you can enable (and disable) features.
If you want to toggle certain features for an existing SDK, you need to navigate to your SDK, update it, and re-publish it.

My feature isn't working?

Many features sit behind this modular structure. For example, the VR API or Up Next API won't work unless you've enabled the feature when creating your SDK.

How do I know which features are enabled?

You can log in to portal.theoplayer.com and navigate to your account. Once you're there, you further navigate to your desired SDK and check how you've customized your features.

If you're a developer (and you're only interested in this answer for the THEOplayer Web SDK), then you can also figure this out at runtime through JavaScript. You can call THEOplayer.features to identify which features are enabled.

THEOplayer.features
// (29) ["dash", "hls", "chromecast", "ads", "airplay", "yospace", "spotx", "vr", "conviva", "cache", "visibility", "webaudio", "youbora", "mediamelon", "moat", "google-dai", "streamone", "v-nova", "freewheel", "agama", "ui", "relatedcontent", "social", "upnext", "contextmenu", "texttrackstyle-ui", "activequalitylabel", "upcomingadnotification"]

How do I quantify my optimizations?

After optimizing your SDK, by enabling and disabling certain features, you might want to quantify those actions.

You could compare the file size of your THEOplayer.js files. For example, when building THEOplayer 2.78.1, with only the "HLS" and "UI" feature enabled, the library size is 315 kB. THEOplayer 2.78.1, with almost all features enabled, is almost 77% larger at 558 kB.
You could measure the loading time of your THEOplayer library.

Note that optimizing a video player goes way beyond reducing your file size. As a developer, you could consider async library loading, you could change your ABR strategy (as demonstrated), you want to optimize your time-to-first-frame, and much more!

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