> For the complete documentation index, see [llms.txt](https://docs.apryse.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.apryse.com/web/video/video/comparing-videos.md).
# Comparing videos
Compare videos side by side with WebViewer Video to easily identify differences. Follow our guide to integrate compare into your application seamlessly. The Apryse Web SDK streamlines secure, serverle
WebViewer Video allows you to compare two videos side by side to easily spot differences between the two videos.
## Sample compare page
The WebViewer-Video github [sample](https://github.com/ApryseSDK/webviewer-video-sample/) has a compare sample ready to go. We recommend running that sample directly. To do so, first clone repository and then run the following commands:
{% tabs %}
{% tab title="Shell" %}
{% code lineNumbers="true" %}
```sh
# command line
npm i
npm run start-samples
```
{% endcode %}
{% endtab %}
{% endtabs %}
The steps below will recreate the sample. Use them to integrate compare into you application.
### Initial setup
Before you begin, make sure your development environment includes [Node.js](https://nodejs.org/en/) and [npm](https://www.npmjs.com/get-npm/).
### How to use
To load your video in compare; we used the [`enableCompareMode`](https://sdk.apryse.com/api/video/UI.html#.enableCompareMode__anchor) API. WebViewer Video will automatically configure everything to be setup. See the following code below on how to call this API:
{% tabs %}
{% tab title="JavaScript" %}
{% code lineNumbers="true" %}
```js
import React, { useRef, useEffect } from 'react';
import WebViewer from '@pdftron/webviewer';
import { initializeVideoViewer } from '@pdftron/webviewer-video';
const App = () => {
const viewer = useRef(null);
const videoUrl = 'https://pdftron.s3.amazonaws.com/downloads/pl/video/video.mp4';
useEffect(() => {
WebViewer(
{
path: '/webviewer/lib',
},
viewer.current,
).then(async instance => {
// Extends WebViewer to allow loading media files (.mp3, .mp4, ogg, webm, etc.)
const {
loadVideo,
UI,
} = await initializeVideoViewer(
instance,
{
license: '---- Insert commercial license key here after purchase ----',
}
);
await UI.enableCompareMode();
// Load a video at a specific url. Can be a local or public link
// If local it needs to be relative to lib/ui/index.html.
// Or at the root. (eg '/video.mp4')
loadVideo(videoUrl, { fileId: 'testId' });
});
}, []);
return (
);
}
export default App;
```
{% endcode %}
{% endtab %}
{% endtabs %}
### Programatically load videos
Video compare brings two new APIs that allow users to programatically load videos on either side of the comparison. In this example we used [`loadCompareVideoB`](https://sdk.apryse.com/api/video/UI.html#.loadCompareVideoB__anchor) to load a video on the right side of the comparison. If you wish to load a video on the left side of the comparison, you can use [`loadCompareVideoA`](https://sdk.apryse.com/api/video/UI.html#.loadCompareVideoA__anchor).
{% tabs %}
{% tab title="JavaScript" %}
{% code lineNumbers="true" %}
```js
import React, { useRef, useEffect } from 'react';
import WebViewer from '@pdftron/webviewer';
import { initializeVideoViewer } from '@pdftron/webviewer-video';
const App = () => {
const viewer = useRef(null);
const videoUrl = 'https://pdftron.s3.amazonaws.com/downloads/pl/video/video.mp4';
useEffect(() => {
WebViewer(
{
path: '/webviewer/lib',
},
viewer.current,
).then(async instance => {
// Extends WebViewer to allow loading media files (.mp3, .mp4, ogg, webm, etc.)
const {
loadVideo,
UI,
} = await initializeVideoViewer(
instance,
{
license: '---- Insert commercial license key here after purchase ----',
}
);
await UI.enableCompareMode();
// Load a video at a specific url. Can be a local or public link
// If local it needs to be relative to lib/ui/index.html.
// Or at the root. (eg '/video.mp4')
loadVideo(videoUrl, { fileId: 'testId' });
window.addEventListener(
'documentViewer2Ready',
() => {
UI.loadCompareVideoB(videoUrl);
},
{ once: true },
);
});
}, []);
return (
);
}
export default App;
```
{% endcode %}
{% endtab %}
{% endtabs %}
---
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