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Tweak google cast documentation (#19736)

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Erik Montnemery 2021-10-13 09:43:16 +02:00 committed by GitHub
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@ -52,6 +52,14 @@ Home Assistant Cast requires your Home Assistant installation to be accessible v
## Playing media
<div class='note'>
Chromecasts generally ignore DNS servers from DHCP and will instead use Google's DNS servers, 8.8.8.8 and 8.8.4.4. This means media URLs must either be specifying the IP-address of the server directly, e.g. `http://192.168.1.1:8123/movie.mp4`, or be publicly resolvable, e.g. `http://homeassistant.internal.mydomain.com:8123/movie.mp4` where `homeassistant.internal.mydomain.com` resolves to `129.168.1.1`. A hostname which can't be publicly resolved, e.g. `http://homeassistant.local:8123/movie.mp4` will fail to play.
This is important when casting TTS or local media sources; the cast integration will cast such media from the `external_url` if [configured](/docs/configuration/basic), otherwise from the Home Assistant Cloud if configured, otherwise from the [`internal_url`](/docs/configuration/basic). Note that the Home Assistant Cloud will not be used if an `external_url` is configured.
</div>
### Using the built in media player app (Default Media Receiver)
Chromecasts can play many kinds of modern [media (image/audio/video) formats](https://developers.google.com/cast/docs/media) using the built in app Default Media Receiver. As a rule of thumb, if a Chrome browser can play a media file a Chromecast will be able to handle that too.