IntroductionHow to add CSS or JavaScript files to an Android/iOS projectHow to combat autoplay policiesPlayback issue with Internet Explorer 11Why does fullscreen not behave as expected on iOSWhy does the Network API not work on iOS devicesWhy doesn't Chromecast work when embedded in an iframe on iOSWhy can't I select another video quality on iOS/tvOS?Is YouTube supportedWhy 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 THEOplayerWhy the Visibility API does not work through an iframe on Safari and IE11What is an impressionHow to know whether a live stream is playingWhich error related events does the player exposeWhy did my subtitles stop workingHow does Media Engagement Index (MEI) affect Autoplay on ChromeWhat does the error message 'Unknown CDM error' meanWhat does the error message 'Something went wrong with Native playback' meanWhy are not all response headers exposedWhy does the currentTime seem off in my livestream & what can I do about itHow to remove CORS restrictions from a reproduction streamWhich network calls (or requests) does THEOplayer doWhy does the playback not work when using the Chrome iPhone/iPad simulatorWhat does the error message 'can only be initiated by a user gesture' imply? Can I still force the desired actionHow to remove unwanted CC track in iOS or SafariKnown Chromecast Limitations in 2.61.1What are the Product Flavor options in the Android SDK (minApi16 and minApi21)Why do I get a gray play button in my Android WebView and how to remove it?I'm unable to inspect Webview with the Android SDKMediaTek limitationsHow to fix Android DRM in Chrome 74How to use ProGuard with THEOplayer Android SDKSelf-hosting and versioning of THEOplayerDoes THEOplayer support EXT-X-DATERANGECan clipping be used on a playlistCan timeline thumbnails be made available before playback startWhat are the benefits of preloadingWhat are the player seeking and seeked events and when are they firedCan we use HLS or DASH adsHow to change text in THEOplayerChange text when AirplayingITP2.1 problems using THEOplayerRemoving 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 foundCan we show a custom message on 403 on mp4Can we prevent UpNext feature from redirectingIs it possible to preload VOD content while the pre-roll is playingWhy is my video not playing automaticallyIs it possible to have multiple player instances play at the same timeIs it a problem if the viewer pauses a live stream for longer than the DVR windowTHEOplayer Features & ModulesChromecast on my webplayer does not work any longer despite no change in my implementationHow to track network errorsWhat is the support for WowzaHow to use the CDN fallback/backup stream featureHow to apply accurate buffering strategyHow can I distribute 4K content?What is the collaboration between Azure Media Services and THEOplayerIs Portrait mode supportedHow to prevent screen recordingThe provided video source is incompatible with the license for this playerPage and Source domainsWhat does the error message “Something went wrong determining the initial period of the provided MPEG-DASH stream” meanWhy is my PlayReady stream not working in Chromium Edge?Which subtitle and CC formats are supported on native SafariHow to navigate through the documentation and resourcesHow to create a (great) ticketHow to investigate a ticketWhat are the limitations of AirPlayWhat are the Edgecast challengesHow to use the Media Session APIHow to use THEOplayer iOS SDK on an M1 macWidevine CDM deprecation notice for old browser versions
Why did my subtitles stop working
This question is occasionally asked by developers who've configured the latest release of THEOplayer.
Before version 2.80
The most common reason on an older build why closed captions are no longer working is because the texttrackrendering feature isn't enabled. To verify whether this feature is enabled you can execute the query below.
var subsEnabled = (THEOplayer.features.indexOf("texttrackrendering") > -1)After version 2.80
Starting in THEOplayer version 2.80 the texttrackrendering feature is no longer an optional feature. It is instead part of the default build, and is always enabled.
Other frequent reasons:
- A new stream is configured which does not list any subtitles in its manifest.
- The subtitle file can't be retrieved. (e.g. 404)
- There are CORS issues with the subtitle file.
- The subtitle file is encoded in a non-compatible format.
Make sure to follow us on GitHub!
Copyright © 2022. All Rights Reserved.
Leuven
New York
Singapore
Barcelona