CODEWITHSUNDEEP
iosswiftcastingiotgoogle-tv
Berlin
Berlin

Reputation: 2227

How to Implement Screen Mirroring in iOS for Google TV?

I am developing an iOS application that supports screen mirroring to Google TV (or Chromecast with Google TV). My goal is to mirror the iPhone/iPad screen in real time to a Google TV device.

What I Have Tried So Far

I have explored multiple approaches but haven't found a direct way to achieve low-latency screen mirroring. Here are some of my findings:

Google Cast SDK:

Google Cast SDK is primarily designed for casting media (videos, images, audio) rather than real-time mirroring. It supports custom receiver applications, but there are no direct APIs for full screen mirroring. Casting a recorded video is possible, but it introduces latency and is not real-time.

ReplayKit for Screen Capture:

RPScreenRecorder.shared().startCapture(handler: ...) allows capturing the iPhone screen as a video stream. However, sending this stream to Google TV in real time is a challenge. I could potentially encode the video as HLS and stream it, but the delay is significant.

RTSP/UDP Streaming:

Some third-party libraries support RTSP/UDP streaming for real-time screen sharing. Google TV does not natively support RTSP, making this approach difficult.

My Questions:

Is it possible to achieve real-time screen mirroring on Google TV using Google Cast SDK? Does Google TV support WebRTC or any low-latency streaming protocol that can be used from iOS? Are there any alternative approaches to mirror an iOS screen to Google TV with minimal latency? I would appreciate any guidance, code examples, or references to relevant documentation.

Upvotes: 1

Views: 118

Answers (1)

Swati
Swati

Reputation: 124

Real-time screen mirroring from iOS to Google TV (Chromecast with Google TV) is challenging due to latency and protocol limitations. Please note:

Google Cast SDK: Does not support real-time screen mirroring, only media casting. WebRTC Support: Google TV does not natively support WebRTC, so direct low-latency streaming is not feasible. ReplayKit + Streaming: Capturing the screen using RPScreenRecorder and streaming via HLS introduces significant latency. RTSP/UDP Streaming: Google TV does not natively support RTSP, making direct streaming difficult.

Alternative Approach: Use a custom receiver app on Google TV to handle a low-latency video stream. Stream the captured screen using WebRTC (if a receiver is implemented on Google TV) or low-latency DASH. Consider third-party solutions like AirPlay-compatible apps on Google TV.

Since native support is limited, a custom streaming solution with a WebRTC receiver or a low-latency protocol may be required.

Upvotes: 0

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