how much internet do you think the player will need ? for a movie for example
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i believe miracast doesnt uses another technology which doesnt use data, but another way of using the internet.
The player is just a download of a HTML5 app (except for Netflix), it should be tiny, and doesn't matter what you're playing.
Miracast is screen mirroring, so it requires your
device to play the movie, and what you see on your device is what goes to the TV.
The advantage is that often times the device can play more via software like MX Player. The disadvantage is that you cannot do other things with your device while playing the movie as
exactly what you see on your device is what appears on the TV. Not so good if you get an embarrassing text message or something, and it'll use a lot of battery power.
The advantage to Chromecast is that Chromecast itself does the playback.. Once you make the request to play a video, you can do whatever you want on your device - even turn it off. Your device (or another device on your network) acts as the remote control.
Personally I really like it - I can browse YouTube and add videos to the TV Queue
while stuff is playing full-screen on the TV.
I can play a movie in Netflix for my family to watch while I browser other movies they might like.
If I need to leave, my wife can run the same app and connect to Chromecast so she can pause/play/change things.