From 9bfc749803d79a7de5bcc46b3db376a12ef66e31 Mon Sep 17 00:00:00 2001 From: Romain Vimont Date: Mon, 30 Oct 2023 23:27:11 +0100 Subject: [PATCH] Add camera documentation PR #4213 --- README.md | 6 +- doc/camera.md | 150 ++++++++++++++++++++++++++++++++++++++++++++++++++ doc/video.md | 9 +++ 3 files changed, 163 insertions(+), 2 deletions(-) create mode 100644 doc/camera.md diff --git a/README.md b/README.md index 9f1ba6b4..10437b79 100644 --- a/README.md +++ b/README.md @@ -25,12 +25,13 @@ It focuses on: [lowlatency]: https://github.com/Genymobile/scrcpy/pull/646 Its features include: - - [audio forwarding](doc/audio.md) (Android >= 11) + - [audio forwarding](doc/audio.md) (Android 11+) - [recording](doc/recording.md) - mirroring with [Android device screen off](doc/device.md#turn-screen-off) - [copy-paste](doc/control.md#copy-paste) in both directions - [configurable quality](doc/video.md) - - Android device screen [as a webcam (V4L2)](doc/v4l2.md) (Linux-only) + - [camera mirroring](doc/camera.md) (Android 12+) + - [mirroring as a webcam (V4L2)](doc/v4l2.md) (Linux-only) - [physical keyboard/mouse simulation (HID)](doc/hid-otg.md) - [OTG mode](doc/hid-otg.md#otg) - and more… @@ -77,6 +78,7 @@ documented in the following pages: - [Recording](doc/recording.md) - [Tunnels](doc/tunnels.md) - [HID/OTG](doc/hid-otg.md) + - [Camera](doc/camera.md) - [Video4Linux](doc/v4l2.md) - [Shortcuts](doc/shortcuts.md) diff --git a/doc/camera.md b/doc/camera.md new file mode 100644 index 00000000..d1008bda --- /dev/null +++ b/doc/camera.md @@ -0,0 +1,150 @@ +# Camera + +Camera mirroring is supported for devices with Android 12 or higher. + +To capture the camera instead of the device screen: + +``` +scrcpy --video-source=camera +``` + +By default, it automatically switches [audio source](audio.md#source) to +microphone (as if `--audio-source=mic` were also passed). + +```bash +scrcpy --video-source=display # default is --audio-source=output +scrcpy --video-source=camera # default is --audio-source=mic +scrcpy --video-source=display --audio-source=mic # force display AND microphone +scrcpy --video-source=camera --audio-source=output # force camera AND device audio output +``` + + +## List + +To list the cameras available (with their declared valid sizes and frame rates): + +``` +scrcpy --list-cameras +scrcpy --list-camera-sizes +``` + +_Note that the sizes and frame rates are declarative. They are not accurate on +all devices: some of them are declared but not supported, while some others are +not declared but supported._ + + +## Selection + +It is possible to pass an explicit camera id (as listed by `--list-cameras`): + +``` +scrcpy --video-source=camera --camera-id=0 +``` + +Alternatively, the camera may be selected automatically: + +```bash +scrcpy --video-source=camera # use the first camera +scrcpy --video-source=camera --camera-facing=front # use the first front camera +scrcpy --video-source=camera --camera-facing=back # use the first back camera +scrcpy --video-source=camera --camera-facing=external # use the first external camera +``` + +If `--camera-id` is specified, then `--camera-facing` is forbidden (the id +already determines the camera): + +```bash +scrcpy --video-source=camera --camera-id=0 --camera-facing=front # error +``` + + +### Size selection + +It is possible to pass an explicit camera size: + +``` +scrcpy --video-source=camera --camera-size=1920x1080 +``` + +The given size may be listed among the declared valid sizes +(`--list-camera-sizes`), but may also be anything else (some devices support +arbitrary sizes): + +``` +scrcpy --video-source=camera --camera-size=1840x444 +``` + +Alternatively, a declared valid size (among the ones listed by +`list-camera-sizes`) may be selected automatically. + +Two constraints are supported: + - `-m`/`--max-size` (already used for display mirroring), for example `-m1920`; + - `--camera-ar` to specify an aspect ratio (`:`, `` or + `sensor`). + +Some examples: + +```bash +scrcpy --video-source=camera # use the greatest width and the greatest associated height +scrcpy --video-source=camera -m1920 # use the greatest width not above 1920 and the greatest associated height +scrcpy --video-source=camera --camera-ar=4:3 # use the greatest size with an aspect ratio of 4:3 (+/- 10%) +scrcpy --video-source=camera --camera-ar=1.6 # use the greatest size with an aspect ratio of 1.6 (+/- 10%) +scrcpy --video-source=camera --camera-ar=sensor # use the greatest size with the aspect ratio of the camera sensor (+/- 10%) +scrcpy --video-source=camera -m1920 --camera-ar=16:9 # use the greatest width not above 1920 and the closest to 16:9 aspect ratio +``` + +If `--camera-size` is specified, then `-m`/`--max-size` and `--camera-ar` are +forbidden (the size is determined by the value given explicitly): + +```bash +scrcpy --video-source=camera --camera-size=1920x1080 -m3000 # error +``` + + +## Frame rate + +By default, camera is captured at Android's default frame rate (30 fps). + +To configure a different frame rate: + +``` +scrcpy --video-source=camera --camera-fps=60 +``` + + +## High speed capture + +The Android camera API also supports a [high speed capture mode][high speed]. + +This mode is restricted to specific resolutions and frame rates, listed by +`--list-camera-sizes`. + +``` +scrcpy --video-source=camera --camera-size=1920x1080 --camera-fps=240 +``` + +[high speed]: https://developer.android.com/reference/android/hardware/camera2/CameraConstrainedHighSpeedCaptureSession + + +## Brace expansion tip + +All camera options start with `--camera-`, so if your shell supports it, you can +benefit from [brace expansion] (for example, it is supported _bash_ and _zsh_): + +```bash +scrcpy --video-source=camera --camera-{facing=back,ar=16:9,high-speed,fps=120} +``` + +This will be expanded as: + +```bash +scrcpy --video-source=camera --camera-facing=back --camera-ar=16:9 --camera-high-speed --camera-fps=120 +``` + +[brace expansion]: https://www.gnu.org/software/bash/manual/html_node/Brace-Expansion.html + + +## Webcam + +Combined with the [V4L2](v4l2.md) feature on Linux, the Android device camera +may be used as a webcam on the computer. diff --git a/doc/video.md b/doc/video.md index 5ce749f9..512e0aba 100644 --- a/doc/video.md +++ b/doc/video.md @@ -1,5 +1,14 @@ # Video +## Source + +By default, scrcpy mirrors the device screen. + +It is possible to capture the device camera instead. + +See the dedicated [camera](camera.md) page. + + ## Size By default, scrcpy attempts to mirror at the Android device resolution.