scrcpy  1.12.1
About: scrcpy provides display and control of Android devices connected on USB (or over TCP/IP).
  Fossies Dox: scrcpy-1.12.1.tar.gz  ("unofficial" and yet experimental doxygen-generated source code documentation)  

scrcpy Documentation

Some Fossies usage hints in advance:

  1. To see the Doxygen generated documentation please click on one of the items in the steelblue colored "quick index" bar above or use the side panel at the left which displays a hierarchical tree-like index structure and is adjustable in width.
  2. If you want to search for something by keyword rather than browse for it you can use the client side search facility (using Javascript and DHTML) that provides live searching, i.e. the search results are presented and adapted as you type in the Search input field at the top right.
  3. Doxygen doesn't incorporate all member files but just a definable subset (basically the main project source code files that are written in a supported language). So to search and browse all member files you may visit the Fossies
  4. scrcpy-1.12.1.tar.gz contents page and use the Fossies standard member browsing features (also with source code highlighting and additionally with optional code folding).
README.md

scrcpy (v1.12)

This application provides display and control of Android devices connected on USB (or over TCP/IP). It does not require any root access. It works on GNU/Linux, Windows and macOS.

screenshot

It focuses on:

  • lightness (native, displays only the device screen)
  • performance (30~60fps)
  • quality (1920×1080 or above)
  • low latency (35~70ms)
  • low startup time (~1 second to display the first image)
  • non-intrusiveness (nothing is left installed on the device)

Requirements

The Android device requires at least API 21 (Android 5.0).

Make sure you enabled adb debugging on your device(s).

On some devices, you also need to enable an additional option to control it using keyboard and mouse.

Get the app

Linux

On Linux, you typically need to build the app manually. Don't worry, it's not that hard.

A Snap package is available: scrcpy.

For Arch Linux, an AUR package is available: scrcpy.

For Gentoo, an Ebuild is available: scrcpy/.

Windows

For Windows, for simplicity, prebuilt archives with all the dependencies (including adb) are available:

You can also build the app manually.

macOS

The application is available in Homebrew. Just install it:

brew install scrcpy

You need adb, accessible from your PATH. If you don't have it yet:

brew cask install android-platform-tools

You can also build the app manually.

Run

Plug an Android device, and execute:

scrcpy

It accepts command-line arguments, listed by:

scrcpy --help

Features

Capture configuration

Reduce size

Sometimes, it is useful to mirror an Android device at a lower definition to increase performance.

To limit both the width and height to some value (e.g. 1024):

scrcpy --max-size 1024
scrcpy -m 1024  # short version

The other dimension is computed to that the device aspect ratio is preserved. That way, a device in 1920×1080 will be mirrored at 1024×576.

Change bit-rate

The default bit-rate is 8 Mbps. To change the video bitrate (e.g. to 2 Mbps):

scrcpy --bit-rate 2M
scrcpy -b 2M  # short version

Limit frame rate

On devices with Android >= 10, the capture frame rate can be limited:

scrcpy --max-fps 15

Crop

The device screen may be cropped to mirror only part of the screen.

This is useful for example to mirror only one eye of the Oculus Go:

scrcpy --crop 1224:1440:0:0   # 1224x1440 at offset (0,0)

If --max-size is also specified, resizing is applied after cropping.

Recording

It is possible to record the screen while mirroring:

scrcpy --record file.mp4
scrcpy -r file.mkv

To disable mirroring while recording:

scrcpy --no-display --record file.mp4
scrcpy -Nr file.mkv
# interrupt recording with Ctrl+C
# Ctrl+C does not terminate properly on Windows, so disconnect the device

"Skipped frames" are recorded, even if they are not displayed in real time (for performance reasons). Frames are timestamped on the device, so packet delay variation does not impact the recorded file.

Connection

Wireless

Scrcpy uses adb to communicate with the device, and adb can connect to a device over TCP/IP:

  1. Connect the device to the same Wi-Fi as your computer.
  2. Get your device IP address (in Settings → About phone → Status).
  3. Enable adb over TCP/IP on your device: adb tcpip 5555.
  4. Unplug your device.
  5. Connect to your device: adb connect DEVICE_IP:5555 (replace DEVICE_IP).
  6. Run scrcpy as usual.

It may be useful to decrease the bit-rate and the definition:

scrcpy --bit-rate 2M --max-size 800
scrcpy -b2M -m800  # short version

Multi-devices

If several devices are listed in adb devices, you must specify the serial:

scrcpy --serial 0123456789abcdef
scrcpy -s 0123456789abcdef  # short version

You can start several instances of scrcpy for several devices.

SSH tunnel

To connect to a remote device, it is possible to connect a local adb client to a remote adb server (provided they use the same version of the adb protocol):

adb kill-server    # kill the local adb server on 5037
ssh -CN -L5037:localhost:5037 -R27183:localhost:27183 your_remote_computer
# keep this open

From another terminal:

scrcpy

Like for wireless connections, it may be useful to reduce quality:

scrcpy -b2M -m800 --max-fps 15

Window configuration

Title

By default, the window title is the device model. It can be changed:

scrcpy --window-title 'My device'

Position and size

The initial window position and size may be specified:

scrcpy --window-x 100 --window-y 100 --window-width 800 --window-height 600

Borderless

To disable window decorations:

scrcpy --window-borderless

Always on top

To keep the scrcpy window always on top:

scrcpy --always-on-top

Fullscreen

The app may be started directly in fullscreen:

scrcpy --fullscreen
scrcpy -f  # short version

Fullscreen can then be toggled dynamically with Ctrl+f.

Other mirroring options

Read-only

To disable controls (everything which can interact with the device: input keys, mouse events, drag&drop files):

scrcpy --no-control
scrcpy -n

Turn screen off

It is possible to turn the device screen off while mirroring on start with a command-line option:

scrcpy --turn-screen-off
scrcpy -S

Or by pressing Ctrl+o at any time.

To turn it back on, press POWER (or Ctrl+p).

Render expired frames

By default, to minimize latency, scrcpy always renders the last decoded frame available, and drops any previous one.

To force the rendering of all frames (at a cost of a possible increased latency), use:

scrcpy --render-expired-frames

Show touches

For presentations, it may be useful to show physical touches (on the physical device).

Android provides this feature in Developers options.

Scrcpy provides an option to enable this feature on start and disable on exit:

scrcpy --show-touches
scrcpy -t

Note that it only shows physical touches (with the finger on the device).

Input control

Rotate device screen

Press Ctrl+r to switch between portrait and landscape modes.

Note that it rotates only if the application in foreground supports the requested orientation.

Copy-paste

It is possible to synchronize clipboards between the computer and the device, in both directions:

  • Ctrl+c copies the device clipboard to the computer clipboard;
  • Ctrl+Shift+v copies the computer clipboard to the device clipboard;
  • Ctrl+v pastes the computer clipboard as a sequence of text events (but breaks non-ASCII characters).

Text injection preference

There are two kinds of events generated when typing text:

  • key events, signaling that a key is pressed or released;
  • text events, signaling that a text has been entered.

By default, letters are injected using key events, so that the keyboard behaves as expected in games (typically for WASD keys).

But this may cause issues. If you encounter such a problem, you can avoid it by:

scrcpy --prefer-text

(but this will break keyboard behavior in games)

File drop

Install APK

To install an APK, drag & drop an APK file (ending with .apk) to the scrcpy window.

There is no visual feedback, a log is printed to the console.

Push file to device

To push a file to /sdcard/ on the device, drag & drop a (non-APK) file to the scrcpy window.

There is no visual feedback, a log is printed to the console.

The target directory can be changed on start:

scrcpy --push-target /sdcard/foo/bar/

Audio forwarding

Audio is not forwarded by scrcpy. Use USBaudio (Linux-only).

Also see issue #14.

Shortcuts

Action Shortcut Shortcut (macOS)
Switch fullscreen mode Ctrl+f Cmd+f
Resize window to 1:1 (pixel-perfect) Ctrl+g Cmd+g
Resize window to remove black borders Ctrl+x | Double-click¹ Cmd+x | Double-click¹
Click on HOME Ctrl+h | Middle-click Ctrl+h | Middle-click
Click on BACK Ctrl+b | Right-click² Cmd+b | Right-click²
Click on APP_SWITCH Ctrl+s Cmd+s
Click on MENU Ctrl+m Ctrl+m
Click on VOLUME_UP Ctrl+ (up) Cmd+ (up)
Click on VOLUME_DOWN Ctrl+ (down) Cmd+ (down)
Click on POWER Ctrl+p Cmd+p
Power on Right-click² Right-click²
Turn device screen off (keep mirroring) Ctrl+o Cmd+o
Rotate device screen Ctrl+r Cmd+r
Expand notification panel Ctrl+n Cmd+n
Collapse notification panel Ctrl+Shift+n Cmd+Shift+n
Copy device clipboard to computer Ctrl+c Cmd+c
Paste computer clipboard to device Ctrl+v Cmd+v
Copy computer clipboard to device Ctrl+Shift+v Cmd+Shift+v
Enable/disable FPS counter (on stdout) Ctrl+i Cmd+i

¹Double-click on black borders to remove them.
²Right-click turns the screen on if it was off, presses BACK otherwise.

Custom paths

To use a specific adb binary, configure its path in the environment variable ADB:

ADB=/path/to/adb scrcpy

To override the path of the scrcpy-server file, configure its path in SCRCPY_SERVER_PATH.

Why scrcpy?

A colleague challenged me to find a name as unpronounceable as gnirehtet.

strcpy copies a string; scrcpy copies a screen.

How to build?

See BUILD.

Common issues

See the FAQ.

Developers

Read the developers page.

Licence

Copyright (C) 2018 Genymobile
Copyright (C) 2018-2019 Romain Vimont

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

Articles