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Add test page to check for proprietary codecs

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Kevin Sawicki 2017-03-29 15:07:30 -07:00
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docs/development/upgrading-chrome.md
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@ -45,6 +45,46 @@ Chrome/Node API changes.
- 64-bit Linux
- ARM Linux
## Verify ffmpeg builds
Electron ships with a version of `ffmpeg` that includes proprietary codecs by
default. A version without these codecs is built and distributed with each
release as well. Each Chrome upgrade should verify that switching this version is
still supported.
You can verify Electron's support for multiple `ffmpeg` builds by loading the
following page. It should work with the default `ffmpeg` library distributed
with Electron and not work with the `ffmpeg` library built without proprietary
codecs.
```html
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Proprietary Codec Check</title>
</head>
<body>
<p>Checking if Electron is using proprietary codecs by loading video from http://www.quirksmode.org/html5/videos/big_buck_bunny.mp4</p>
<p id="outcome"></p>
<video style="display:none" src="http://www.quirksmode.org/html5/videos/big_buck_bunny.mp4" autoplay></video>
<script>
const video = document.querySelector('video')
video.addEventListener('error', ({target}) => {
if (target.error.code === target.error.MEDIA_ERR_SRC_NOT_SUPPORTED) {
document.querySelector('#outcome').textContent = 'Not using proprietary codecs, video emitted source not supported error event.'
} else {
document.querySelector('#outcome').textContent = `Unexpected error: ${target.error.code}`
}
})
video.addEventListener('playing', () => {
document.querySelector('#outcome').textContent = 'Using proprietary codecs, video started playing.'
})
</script>
</body>
</html>
```
## Links
- [Chrome Release Schedule](https://www.chromium.org/developers/calendar)