That is right. Some of the core google apps do not work with Microg for e.g. Googlepay ,google home does not find the chromecast at all.
The point I was trying to check was if a user has chromecast device and /e/ how could he get it to work. So directly installing the youtube apk gets chromecast to work.
I’m pretty sure it’s not a side app that will get the feature back in other apps !! It’s really libs in micro-G missing for these features 
For youtube how did you do the test ? I installed Youtube app on mine but I don’t have any button to do Cast to my Cast devices ! or it works only with video Chromecast ? I have only audio ones here !
I tried also Google Music but same as Youtube, no cast button anywhere in interface !
no cast icon on mine (OnePlus 3 with /e/ 201812152239 ROM) Do you have video or only audio cast devices ?
It is a first-generation video-capable Chromecast device. Like this
@vincen: Sorry to say that but your tone seems quite aggressive here. I can - literally - feel your pain, but @Manoj is just trying to help here.
@Manoj: Installing the Youtube apk gets Cromecast to work with Youtube. But the whole point of Chromecasts is to work with many sources. I would like to use it with Netflix, Chromium, the included Music app, Spotify, …
Yes, indeed. I have both, Video and Audio and Youtube only works with Chromecast Video. The only app I’m using on a regular basis which works with both - Audio and Video Chromecasts - is Spotify. And on /e/ neither works.
So the bottomline here seems to be: Chromecast is not working on /e/, except for Youtube from apk. I don’t know what’s the reason but @vincen’s explanation of Android usually including a library for Chromecast that isn’t present on /e/ and Youtube having said library included would explain the symptoms.
@Manoj: where exactly should I file this as a bug?
Niko.
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I did: https://gitlab.e.foundation/e/management/issues/197
@Manoj: is the description etc ok?
@vincen: if you think the issue describes your problem you could give it a thumbs up. If not: Please make a comment or open a new issue.
Sorry was not the goal at all, just chatting with niko to find out if there is a solution or if we are stuck with that problem for a while 
Sorry if I gave a different impression (I’m not english native too…)
Yep, thanks for having posted the issue on the bugtracker, I added my thumbs up and comment
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The description is correct. Thanks @niko , @vincen and @cedricoola for highlighting the issue.
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Going back to what the original question was about: my answer is no. But if /e/ is going to include support for a casting service by default I would prefer Miracast. After all, Chromecast is still Google, which is what we’re trying to get away from…
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Qualcomm Allplay works on /e/. I succesfully controlled the D-Stream streamer-amp with /e/ (with the D-Stream Air app installed). It works with the Allplay multiroom standard.
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Miracast would be nice too but it’s only video, and not audio only as Chromecast ! Side note too: it exists from what I know some open-source implementation of Google Cast so perhaps it could be a way
Second problem: most of streaming apps works only with Google Cast (no Miracast or any open streaming systems unhappy
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It seems like the problem with Chromecast Audio will not be one for many in the future. Google decided to stop selling them. I’m only using that with Spotify. I think i’ll just use a Raspi with Spotify connect.
But the problem with CC Video just got more severe. I can’t even cast from the Youtube app any more.
@niko you are right. I also had this issue with chromecast video starting a few days back. Have raised an issue in Gitlab https://gitlab.e.foundation/e/apps/GmsCore/issues/4
For multiroom audio, I use Squeezer on /e/ to control a Xubuntu LMS instance and a number of piCorePlayer instances. This allows synchronized audio in different rooms and works well. Casting from /e/ to a Roku 2 at a friends house works right out of the box.
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support of chromecast especially chromecast audio is on of the post important features, imho. It works out of the box on many speakers, which you can find in many places. So the chromecast button in apps like spotify, soundcloud, tune in, radiodroid, dlf mediathek, mixcloud, etc. is obligatory! Without that button they become almost useless.
For LMS you need an extra instance always running, so it is only feasible at home (and at least spotify support terminated). You can’t use it e.g. at a no-tech-friends place. I once had a LMS with raspberries setup, mutliroom often needed manual reconfiguration of the delay between rooms (and sometimes some other issues, but its a while ago I used it).
Chromecast is the most user-friendly and the most widespread (multi room) system, so supporting it should be made possible by all means.
If you are using Google home, you don’t need a rom like e. Google home is spying on you!
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Here I’m switching away of Google Cast (audio version is in all matters no more avalaible since a while here in Europe) to PMP (Plex Media Player) on PI 0 W. As I use already Plex for all my medias, it’ll be perfect and at least won’t spy on me 
Good luck with cast system 
I’m totally open for switching away from chromecast. Does PMP support Spotify Connect? Spotify Connect would basically cover 99% of my audio needs.