Improve features presentation in README

README.md

@@ -86,43 +86,141 @@ It accepts command-line arguments, listed by:
 scrcpy --help
 ```
 
-For example, to decrease video bitrate to 2Mbps (default is 8Mbps):
+## Features
+
+
+### Reduce size
+
+Sometimes, it is useful to mirror an Android device at a lower definition to
+increase performances.
+
+To limit both width and height to some value (e.g. 1024):
 
 ```bash
-scrcpy -b 2M
+scrcpy --max-size 1024
+scrcpy -m 1024  # short version
 ```
 
-To limit the video dimensions (e.g. if the device is 2540×1440, but the host
-screen is smaller, or cannot decode such a high definition):
+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 8Mbps. To change the video bitrate (e.g. to 2Mbps):
 
 ```bash
-scrcpy -m 1024
+scrcpy --bit-rate 2M
+scrcpy -b 2M  # short version
 ```
 
-The device screen may be cropped to mirror only part of the screen:
+
+### Crop
+
+The device screen may be cropped to mirror only part of the screen.
+
+This is useful for example to mirror only 1 eye of the Oculus Go:
 
 ```bash
-scrcpy -c 1224:1440:0:0   # 1224x1440 at offset (0,0)
+scrcpy --crop 1224:1440:0:0   # 1224x1440 at offset (0,0)
+scrcpy -c 1224:1440:0:0       # short version
 ```
 
+If `--max-size` is also specified, resizing is applied after cropping.
+
+
+### 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:
+
+```bash
+scrcpy --bit-rate 2M --max-size 800
+scrcpy -b2M -m800  # short version
+```
+
+[connect]: https://developer.android.com/studio/command-line/adb.html#wireless
+
+
+### Record screen
+
+It is possible to record the screen while mirroring:
+
+```bash
+scrcpy --record file.mp4
+scrcpy -r file.mp4
+```
+
+"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.
+
+[packet delay variation]: https://en.wikipedia.org/wiki/Packet_delay_variation
+
+
+### Multi-devices
+
 If several devices are listed in `adb devices`, you must specify the _serial_:
 
 ```bash
-scrcpy -s 0123456789abcdef
+scrcpy --serial 0123456789abcdef
+scrcpy -s 0123456789abcdef  # short version
 ```
 
-To show physical touches while scrcpy is running:
+You can start several instances of _scrcpy_ for several devices.
 
-```bash
-scrcpy -t
-```
+
+### Fullscreen
 
 The app may be started directly in fullscreen:
 
+```bash
+scrcpy --fullscreen
+scrcpy -f  # short version
 ```
-scrcpy -f
+
+Fullscreen can then be toggled dynamically with `Ctrl`+`f`.
+
+
+### 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:
+
+```bash
+scrcpy --show-touches
+scrcpy -t
 ```
 
+Note that it only shows _physical_ touches (with the finger on the device).
+
+
+### Forward audio
+
+Audio is not forwarded by _scrcpy_.
+
+There is a limited solution using [AOA], implemented in the [`audio`] branch. If
+you are interested, see [issue 14].
+
+
+[AOA]: https://source.android.com/devices/accessories/aoa2
+[`audio`]: https://github.com/Genymobile/scrcpy/commits/audio
+[issue 14]: https://github.com/Genymobile/scrcpy/issues/14
+
+
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