8969444ff2
They were listed in the blog post introducing scrcpy: <https://blog.rom1v.com/2018/03/introducing-scrcpy/>
419 lines
11 KiB
Markdown
419 lines
11 KiB
Markdown
# scrcpy (v1.9)
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This application provides display and control of Android devices connected on
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USB (or [over TCP/IP][article-tcpip]). It does not require any _root_ access.
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It works on _GNU/Linux_, _Windows_ and _macOS_.
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It focuses on:
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- **lightness** (native, displays only the device screen)
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- **performance** (30~60fps)
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- **quality** (1920×1080 or above)
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- **low latency** ([35~70ms][lowlatency])
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- **low startup time** (~1 second to display the first image)
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- **non-intrusiveness** (nothing is left installed on the device)
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[lowlatency]: https://github.com/Genymobile/scrcpy/pull/646
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## Requirements
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The Android device requires at least API 21 (Android 5.0).
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Make sure you [enabled adb debugging][enable-adb] on your device(s).
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[enable-adb]: https://developer.android.com/studio/command-line/adb.html#Enabling
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On some devices, you also need to enable [an additional option][control] to
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control it using keyboard and mouse.
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[control]: https://github.com/Genymobile/scrcpy/issues/70#issuecomment-373286323
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## Get the app
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### Linux
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On Linux, you typically need to [build the app manually][BUILD]. Don't worry,
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it's not that hard.
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A [Snap] package is available: [`scrcpy`][snap-link].
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[snap-link]: https://snapstats.org/snaps/scrcpy
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[snap]: https://en.wikipedia.org/wiki/Snappy_(package_manager)
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For Arch Linux, an [AUR] package is available: [`scrcpy`][aur-link].
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[AUR]: https://wiki.archlinux.org/index.php/Arch_User_Repository
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[aur-link]: https://aur.archlinux.org/packages/scrcpy/
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For Gentoo, an [Ebuild] is available: [`scrcpy/`][ebuild-link].
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[Ebuild]: https://wiki.gentoo.org/wiki/Ebuild
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[ebuild-link]: https://github.com/maggu2810/maggu2810-overlay/tree/master/app-mobilephone/scrcpy
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### Windows
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For Windows, for simplicity, prebuilt archives with all the dependencies
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(including `adb`) are available:
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- [`scrcpy-win32-v1.9.zip`][direct-win32]
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_(SHA-256: 3234f7fbcc26b9e399f50b5ca9ed085708954c87fda1b0dd32719d6e7dd861ef)_
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- [`scrcpy-win64-v1.9.zip`][direct-win64]
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_(SHA-256: 0088eca1811ea7c7ac350d636c8465b266e6c830bb268770ff88fddbb493077e)_
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[direct-win32]: https://github.com/Genymobile/scrcpy/releases/download/v1.9/scrcpy-win32-v1.9.zip
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[direct-win64]: https://github.com/Genymobile/scrcpy/releases/download/v1.9/scrcpy-win64-v1.9.zip
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You can also [build the app manually][BUILD].
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### macOS
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The application is available in [Homebrew]. Just install it:
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[Homebrew]: https://brew.sh/
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```bash
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brew install scrcpy
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```
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You need `adb`, accessible from your `PATH`. If you don't have it yet:
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```bash
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brew cask install android-platform-tools
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```
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You can also [build the app manually][BUILD].
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## Run
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Plug an Android device, and execute:
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```bash
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scrcpy
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```
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It accepts command-line arguments, listed by:
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```bash
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scrcpy --help
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```
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## Features
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### Reduce size
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Sometimes, it is useful to mirror an Android device at a lower definition to
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increase performance.
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To limit both the width and height to some value (e.g. 1024):
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```bash
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scrcpy --max-size 1024
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scrcpy -m 1024 # short version
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```
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The other dimension is computed to that the device aspect ratio is preserved.
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That way, a device in 1920×1080 will be mirrored at 1024×576.
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### Change bit-rate
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The default bit-rate is 8 Mbps. To change the video bitrate (e.g. to 2 Mbps):
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```bash
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scrcpy --bit-rate 2M
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scrcpy -b 2M # short version
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```
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### Crop
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The device screen may be cropped to mirror only part of the screen.
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This is useful for example to mirror only one eye of the Oculus Go:
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```bash
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scrcpy --crop 1224:1440:0:0 # 1224x1440 at offset (0,0)
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scrcpy -c 1224:1440:0:0 # short version
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```
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If `--max-size` is also specified, resizing is applied after cropping.
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### Wireless
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_Scrcpy_ uses `adb` to communicate with the device, and `adb` can [connect] to a
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device over TCP/IP:
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1. Connect the device to the same Wi-Fi as your computer.
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2. Get your device IP address (in Settings → About phone → Status).
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3. Enable adb over TCP/IP on your device: `adb tcpip 5555`.
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4. Unplug your device.
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5. Connect to your device: `adb connect DEVICE_IP:5555` _(replace `DEVICE_IP`)_.
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6. Run `scrcpy` as usual.
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It may be useful to decrease the bit-rate and the definition:
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```bash
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scrcpy --bit-rate 2M --max-size 800
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scrcpy -b2M -m800 # short version
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```
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[connect]: https://developer.android.com/studio/command-line/adb.html#wireless
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### Record screen
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It is possible to record the screen while mirroring:
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```bash
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scrcpy --record file.mp4
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scrcpy -r file.mkv
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```
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To disable mirroring while recording:
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```bash
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scrcpy --no-display --record file.mp4
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scrcpy -Nr file.mkv
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# interrupt recording with Ctrl+C
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# Ctrl+C does not terminate properly on Windows, so disconnect the device
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```
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"Skipped frames" are recorded, even if they are not displayed in real time (for
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performance reasons). Frames are _timestamped_ on the device, so [packet delay
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variation] does not impact the recorded file.
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[packet delay variation]: https://en.wikipedia.org/wiki/Packet_delay_variation
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### Multi-devices
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If several devices are listed in `adb devices`, you must specify the _serial_:
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```bash
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scrcpy --serial 0123456789abcdef
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scrcpy -s 0123456789abcdef # short version
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```
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You can start several instances of _scrcpy_ for several devices.
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### Fullscreen
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The app may be started directly in fullscreen:
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```bash
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scrcpy --fullscreen
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scrcpy -f # short version
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```
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Fullscreen can then be toggled dynamically with `Ctrl`+`f`.
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### Always on top
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The window of app can always be above others by:
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```bash
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scrcpy --always-on-top
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scrcpy -T # short version
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```
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### Show touches
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For presentations, it may be useful to show physical touches (on the physical
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device).
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Android provides this feature in _Developers options_.
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_Scrcpy_ provides an option to enable this feature on start and disable on exit:
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```bash
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scrcpy --show-touches
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scrcpy -t
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```
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Note that it only shows _physical_ touches (with the finger on the device).
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### Install APK
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To install an APK, drag & drop an APK file (ending with `.apk`) to the _scrcpy_
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window.
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There is no visual feedback, a log is printed to the console.
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### Push file to device
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To push a file to `/sdcard/` on the device, drag & drop a (non-APK) file to the
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_scrcpy_ window.
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There is no visual feedback, a log is printed to the console.
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The target directory can be changed on start:
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```bash
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scrcpy --push-target /sdcard/foo/bar/
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```
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### Read-only
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To disable controls (everything which can interact with the device: input keys,
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mouse events, drag&drop files):
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```bash
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scrcpy --no-control
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scrcpy -n
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```
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### Turn screen off
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It is possible to turn the device screen off while mirroring on start with a
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command-line option:
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```bash
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scrcpy --turn-screen-off
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scrcpy -S
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```
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Or by pressing `Ctrl`+`o` at any time.
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To turn it back on, press `POWER` (or `Ctrl`+`p`).
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### Render expired frames
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By default, to minimize latency, _scrcpy_ always renders the last decoded frame
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available, and drops any previous one.
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To force the rendering of all frames (at a cost of a possible increased
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latency), use:
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```bash
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scrcpy --render-expired-frames
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```
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### Custom window title
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By default, the window title is the device model. It can be changed:
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```bash
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scrcpy --window-title 'My device'
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```
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### Forward audio
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Audio is not forwarded by _scrcpy_. Use [USBaudio] (Linux-only).
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Also see [issue #14].
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[USBaudio]: https://github.com/rom1v/usbaudio
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[issue #14]: https://github.com/Genymobile/scrcpy/issues/14
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## Shortcuts
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| Action | Shortcut | Shortcut (macOS)
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| -------------------------------------- |:----------------------------- |:-----------------------------
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| Switch fullscreen mode | `Ctrl`+`f` | `Cmd`+`f`
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| Resize window to 1:1 (pixel-perfect) | `Ctrl`+`g` | `Cmd`+`g`
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| Resize window to remove black borders | `Ctrl`+`x` \| _Double-click¹_ | `Cmd`+`x` \| _Double-click¹_
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| Click on `HOME` | `Ctrl`+`h` \| _Middle-click_ | `Ctrl`+`h` \| _Middle-click_
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| Click on `BACK` | `Ctrl`+`b` \| _Right-click²_ | `Cmd`+`b` \| _Right-click²_
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| Click on `APP_SWITCH` | `Ctrl`+`s` | `Cmd`+`s`
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| Click on `MENU` | `Ctrl`+`m` | `Ctrl`+`m`
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| Click on `VOLUME_UP` | `Ctrl`+`↑` _(up)_ | `Cmd`+`↑` _(up)_
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| Click on `VOLUME_DOWN` | `Ctrl`+`↓` _(down)_ | `Cmd`+`↓` _(down)_
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| Click on `POWER` | `Ctrl`+`p` | `Cmd`+`p`
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| Power on | _Right-click²_ | _Right-click²_
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| Turn device screen off (keep mirroring)| `Ctrl`+`o` | `Cmd`+`o`
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| Expand notification panel | `Ctrl`+`n` | `Cmd`+`n`
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| Collapse notification panel | `Ctrl`+`Shift`+`n` | `Cmd`+`Shift`+`n`
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| Copy device clipboard to computer | `Ctrl`+`c` | `Cmd`+`c`
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| Paste computer clipboard to device | `Ctrl`+`v` | `Cmd`+`v`
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| Copy computer clipboard to device | `Ctrl`+`Shift`+`v` | `Cmd`+`Shift`+`v`
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| Enable/disable FPS counter (on stdout) | `Ctrl`+`i` | `Cmd`+`i`
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_¹Double-click on black borders to remove them._
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_²Right-click turns the screen on if it was off, presses BACK otherwise._
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## Custom paths
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To use a specific _adb_ binary, configure its path in the environment variable
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`ADB`:
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ADB=/path/to/adb scrcpy
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To override the path of the `scrcpy-server.jar` file, configure its path in
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`SCRCPY_SERVER_PATH`.
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[useful]: https://github.com/Genymobile/scrcpy/issues/278#issuecomment-429330345
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## Why _scrcpy_?
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A colleague challenged me to find a name as unpronounceable as [gnirehtet].
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[`strcpy`] copies a **str**ing; `scrcpy` copies a **scr**een.
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[gnirehtet]: https://github.com/Genymobile/gnirehtet
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[`strcpy`]: http://man7.org/linux/man-pages/man3/strcpy.3.html
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## How to build?
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See [BUILD].
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[BUILD]: BUILD.md
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## Common issues
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See the [FAQ](FAQ.md).
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## Developers
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Read the [developers page].
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[developers page]: DEVELOP.md
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## Licence
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Copyright (C) 2018 Genymobile
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Copyright (C) 2018-2019 Romain Vimont
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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## Articles
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- [Introducing scrcpy][article-intro]
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- [Scrcpy now works wirelessly][article-tcpip]
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[article-intro]: https://blog.rom1v.com/2018/03/introducing-scrcpy/
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[article-tcpip]: https://www.genymotion.com/blog/open-source-project-scrcpy-now-works-wirelessly/
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