Add captions (Web Player)
Add embedded or side-loaded captions to the HTML5 web player.
Captions provide your viewers synchronized text of the audio and non-speech elements of your video content. In addition, complimenting your video content with captions can have the following benefits:
- Improved video SEO
- Increased content retention
- Increased engagement with autoplay content
- Environment-independent content viewing
- Legal compliance
Supported caption types
Captions can either be embedded in the video (embedded captions) or loaded from a separate file (side-loaded or sidecar captions). JWP's players support both types of captions.
We strongly advise that you remotely self-host video content with embedded captions. If video content with embedded captions is uploaded to your JWP account, the embedded captions may be removed during the encoding process.
The following table lists common caption formats that are supported.
Format | Type | Description |
---|---|---|
CEA-608 / CEA-708 | Embedded | Used in videos that originally were on broadcast television Captions are included as part of the video content. These captions are styled according to the device's captions and subtitle settings that the viewer sets. |
WebVTT (.vtt) | Embedded or Side-loaded | Common format used for online video Captions can be embedded as part of a live stream or can be side-loaded as a separate file. WebVTT captions can include the caption, a description, and metadata information. Your .vtt files should be saved using UTF8 encoding to prevent rendering issues. |
SubRip Text (.srt) | Side-loaded | Common format used for online video SubRip Text captions only include the caption. Neither description nor metadata information can be included. |
Add captions to your video
JWP supports embedded and side-loaded captions. The following sections explain how to add each type of caption to your video.
Embedded captions
To add videos or streams with embedded captions to a player, use the following steps:
- Copy the URL of your video. The video must contain CEA-608, CEA-708, or in-manifest WebVTT captions.
- Define the
file
property of theplaylist
object with the URL of your video.
Do not add videos or streams with embedded captions to your JWP library. The embedded captions tracks of the content may be removed during JWP's video transcoding process.
Side-loaded captions
- Within the
playlist
object for a specific video, create atracks
array. - Create an unnamed object within the
tracks
array. - Define
kind
with the valuecaptions
. - Add the caption track URL (
file
) and language label (label
). - Repeat steps 2-4 for each additional caption track.
<script type="text/JavaScript">
jwplayer("myElement").setup({
"playlist": [
{
"file": "{video_url}",
"tracks": [{
"kind": "captions",
"file": "https://www.yourdomain.com/caption-file_en.vtt",
"label": "English"
},
{
"kind": "captions",
"file": "https://www.yourdomain.com/caption-file_sp.vtt",
"label": "EspaΓ±ol"
}]
}
]
});
</script>
As an alternative to the previous steps, you can add your captions files in your JWP dashboard.
Advanced caption behaviors
In addition to using the configuration options of setup()
to add and customize captions, JWP offers additional captions API calls that allow you to further customize your viewers' experiences.
Updated 12 months ago