Preseaw is a beauty app used to mirror mobile device screen to desktop with low latency, high resolution, high FPS and support audio playback. It come with 2 supporting software:
- Preseaw Desktop (running on computer).
- Preseaw Agent (running on mobile device)
The main protocol media for transfer media data stream is TCP/IP.
Window demo screen shot:
Use ElectronJS for building desktop application and comes with Webpack development and Electron-forge for application packaging.
Use native Java with of support of MediaProjection and MediaEncoder for screen capture and encode H264/AVC stream. Preseaw Agent currently only supports Android from android version 8.0 Oreo (API level >= 26) and only support audio playback from Android 10 (API level >= 29).
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WirePreseaw Desktop find mobile devices via ADB then automating install and launch Agent. -
WirelessPreseaw Desktop and Agent find each other via Boardcast and MDNS. While deskop work as a server for broadcast and answer MDNS query for Agent to listen and query information.
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Mobile device need to connect with computer via cable and enable USB debugging in developer settings.
Specific steps:
- Connect phone to computer with a USB cable.
- Enable developer mode on phone.
- In develeoper mode select USB debugging click allow for the computer connected.
- Now Preseaw Desktop will detect device and launch Preseaw Agent automatically (automatically install the agent if it is not already installed) then the connnection will be successful.
The Preseaw desktop will leverage the full power of ADB (Android Debug Bridge) for doing things like forwarding in localhost to do socket connect, running TouchService class to do on-screen touches, and poweroff screen, etc ...
Advantage: use this connection type for video transmission with high quality and low latency. Always encourage users to use the way to connect.
Disadvantage: having to connect via wires is inconvenient for moving as well as the range of mobile device.
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Both computer and mobile device need to be connected to the same Wi-Fi or Mobile device generate mobile hotspot for desktop as well. Users need to run Preseaw Desktop on computer and Preseaw Agent on mobile device simultaneously. Preseaw Agent will detect the computer automatically or scan with a manual QR code.
Specific steps:
- Connect both computer and mobile device to same Wi-fi network.
- Launch Preseaw Desktop on computer and launch Preseaw Agent on mobile device simultaneously.
- Select computer in Preseaw Agent to connect and allow share screen permission.
- The connection successfully and user need to allow more permission like accessibility for other features.
This type of connection gives flexibility for mobile mobility but lacks the power of ADB.
Advantage: easy connection without wires and no need to enable USB debugging.
Disadvantage: slow connection speed depends on the quality of the Wi-fi network, low video quality and high latency, lack of cool features that ADB had offered.
- Live stream mobile screen to computer real time with low lantency.
- Audio playback with low latency, high quality.
- Video support with quality types
480p(SD),720p(HD),1080p(FULL HD),1440p(2K). - Operation while the screen is off helps save battery life (only supported when connecting is usb cable).
- Record screen with selected video quality with unlimited duration.
- Quick screenshot and save type is PNG.
- Support input keyboard from computer to mobile device with both wire and wireless connection modes.
- Fingers simulation - Gameboard Mode aids in playing 3rd person games and more (only supported when connecting is usb cable).
- Touch operation controls the screen real time.
- Cinema full screen mode with ambient effect.
- Paint on screen with varieties of tool, shape support by excalidraw.
- Mirror multiple devices to up to 4 devices simultaneously.
- Add more fancy themes.
- Support quick drop transfer files
🙋♂️ Nguyen Ba Cu
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