Handle camera disconnection

If --audio-source is not specified, select the default value
according to the video source:
 - for display mirroring, use device audio by default;
 - for camera mirroring, use microphone by default.

app/data/bash-completion/scrcpy

@@ -10,13 +10,10 @@ _scrcpy() {
         --audio-source=
         --audio-output-buffer=
         -b --video-bit-rate=
-        --camera-id=
-        --camera-facing=
-        --camera-size=
         --crop=
         -d --select-usb
         --disable-screensaver
-        --display-id=
+        --display=
         --display-buffer=
         -e --select-tcpip
         -f --fullscreen
@@ -77,7 +74,6 @@ _scrcpy() {
         --video-codec=
         --video-codec-options=
         --video-encoder=
-        --video-source=
         -w --stay-awake
         --window-borderless
         --window-title=
@@ -97,18 +93,10 @@ _scrcpy() {
             COMPREPLY=($(compgen -W 'opus aac raw' -- "$cur"))
             return
             ;;
-        --video-source)
-            COMPREPLY=($(compgen -W 'display camera' -- "$cur"))
-            return
-            ;;
         --audio-source)
             COMPREPLY=($(compgen -W 'output mic' -- "$cur"))
             return
             ;;
-        --camera-facing)
-            COMPREPLY=($(compgen -W 'front back external' -- "$cur"))
-            return
-            ;;
         --lock-video-orientation)
             COMPREPLY=($(compgen -W 'unlocked initial 0 1 2 3' -- "$cur"))
             return
@@ -153,10 +141,8 @@ _scrcpy() {
         |--audio-codec-options \
         |--audio-encoder \
         |--audio-output-buffer \
-        |--camera-id \
-        |--camera-size \
         |--crop \
-        |--display-id \
+        |--display \
         |--display-buffer \
         |--max-fps \
         |-m|--max-size \

app/data/zsh-completion/_scrcpy

@@ -17,13 +17,10 @@ arguments=(
     '--audio-source=[Select the audio source]:source:(output mic)'
     '--audio-output-buffer=[Configure the size of the SDL audio output buffer (in milliseconds)]'
     {-b,--video-bit-rate=}'[Encode the video at the given bit-rate]'
-    '--camera-id=[Specify the camera id to mirror]'
-    '--camera-facing=[Select the device camera by its facing direction]:facing:(front back external)'
-    '--camera-size=[Specify an explicit camera capture size]'
     '--crop=[\[width\:height\:x\:y\] Crop the device screen on the server]'
     {-d,--select-usb}'[Use USB device]'
     '--disable-screensaver[Disable screensaver while scrcpy is running]'
-    '--display-id=[Specify the display id to mirror]'
+    '--display=[Specify the display id to mirror]'
     '--display-buffer=[Add a buffering delay \(in milliseconds\) before displaying]'
     {-e,--select-tcpip}'[Use TCP/IP device]'
     {-f,--fullscreen}'[Start in fullscreen]'
@@ -81,7 +78,6 @@ arguments=(
     '--video-codec=[Select the video codec]:codec:(h264 h265 av1)'
     '--video-codec-options=[Set a list of comma-separated key\:type=value options for the device video encoder]'
     '--video-encoder=[Use a specific MediaCodec video encoder]'
-    '--video-source=[Select the video source]:source:(display camera)'
     {-w,--stay-awake}'[Keep the device on while scrcpy is running, when the device is plugged in]'
     '--window-borderless[Disable window decorations \(display borderless window\)]'
     '--window-title=[Set a custom window title]'

app/scrcpy.1

@@ -75,22 +75,6 @@ Encode the video at the given bit rate, expressed in bits/s. Unit suffixes are s
 
 Default is 8M (8000000).
 
-.TP
-.BI "\-\-camera\-id " id
-Specify the device camera id to mirror.
-
-The available camera ids can be listed by \-\-list\-cameras.
-
-.TP
-.BI "\-\-camera\-facing " facing
-Select the device camera by its facing direction.
-
-Possible values are "front", "back" and "external".
-
-.TP
-.BI "\-\-camera\-size " width\fRx\fIheight
-Specify an explicit camera capture size.
-
 .TP
 .BI "\-\-crop " width\fR:\fIheight\fR:\fIx\fR:\fIy
 Crop the device screen on the server.
@@ -110,7 +94,7 @@ Also see \fB\-e\fR (\fB\-\-select\-tcpip\fR).
 Disable screensaver while scrcpy is running.
 
 .TP
-.BI "\-\-display\-id " id
+.BI "\-\-display " id
 Specify the device display id to mirror.
 
 The available display ids can be listed by \-\-list\-displays.
@@ -448,12 +432,6 @@ Use a specific MediaCodec video encoder (depending on the codec provided by \fB\
 
 The available encoders can be listed by \-\-list\-encoders.
 
-.TP
-.BI "\-\-video\-source " source
-Select the video source (display or camera).
-
-Default is display.
-
 .TP
 .B \-w, \-\-stay-awake
 Keep the device on while scrcpy is running, when the device is plugged in.

app/src/adb/adb.c

@@ -218,16 +218,8 @@ sc_adb_forward(struct sc_intr *intr, const char *serial, uint16_t local_port,
                const char *device_socket_name, unsigned flags) {
     char local[4 + 5 + 1]; // tcp:PORT
     char remote[108 + 14 + 1]; // localabstract:NAME
-
-    int r = snprintf(local, sizeof(local), "tcp:%" PRIu16, local_port);
-    assert(r >= 0 && (size_t) r < sizeof(local));
-
-    r = snprintf(remote, sizeof(remote), "localabstract:%s",
-                 device_socket_name);
-    if (r < 0 || (size_t) r >= sizeof(remote)) {
-        LOGE("Could not write socket name");
-        return false;
-    }
+    sprintf(local, "tcp:%" PRIu16, local_port);
+    snprintf(remote, sizeof(remote), "localabstract:%s", device_socket_name);
 
     assert(serial);
     const char *const argv[] =
@@ -241,9 +233,7 @@ bool
 sc_adb_forward_remove(struct sc_intr *intr, const char *serial,
                       uint16_t local_port, unsigned flags) {
     char local[4 + 5 + 1]; // tcp:PORT
-    int r = snprintf(local, sizeof(local), "tcp:%" PRIu16, local_port);
-    assert(r >= 0 && (size_t) r < sizeof(local));
-    (void) r;
+    sprintf(local, "tcp:%" PRIu16, local_port);
 
     assert(serial);
     const char *const argv[] =
@@ -259,16 +249,8 @@ sc_adb_reverse(struct sc_intr *intr, const char *serial,
                unsigned flags) {
     char local[4 + 5 + 1]; // tcp:PORT
     char remote[108 + 14 + 1]; // localabstract:NAME
-    int r = snprintf(local, sizeof(local), "tcp:%" PRIu16, local_port);
-    assert(r >= 0 && (size_t) r < sizeof(local));
-
-    r = snprintf(remote, sizeof(remote), "localabstract:%s",
-                 device_socket_name);
-    if (r < 0 || (size_t) r >= sizeof(remote)) {
-        LOGE("Could not write socket name");
-        return false;
-    }
-
+    sprintf(local, "tcp:%" PRIu16, local_port);
+    snprintf(remote, sizeof(remote), "localabstract:%s", device_socket_name);
     assert(serial);
     const char *const argv[] =
         SC_ADB_COMMAND("-s", serial, "reverse", remote, local);
@@ -281,12 +263,7 @@ bool
 sc_adb_reverse_remove(struct sc_intr *intr, const char *serial,
                       const char *device_socket_name, unsigned flags) {
     char remote[108 + 14 + 1]; // localabstract:NAME
-    int r = snprintf(remote, sizeof(remote), "localabstract:%s",
-                     device_socket_name);
-    if (r < 0 || (size_t) r >= sizeof(remote)) {
-        LOGE("Device socket name too long");
-        return false;
-    }
+    snprintf(remote, sizeof(remote), "localabstract:%s", device_socket_name);
 
     assert(serial);
     const char *const argv[] =
@@ -356,9 +333,7 @@ bool
 sc_adb_tcpip(struct sc_intr *intr, const char *serial, uint16_t port,
              unsigned flags) {
     char port_string[5 + 1];
-    int r = snprintf(port_string, sizeof(port_string), "%" PRIu16, port);
-    assert(r >= 0 && (size_t) r < sizeof(port_string));
-    (void) r;
+    sprintf(port_string, "%" PRIu16, port);
 
     assert(serial);
     const char *const argv[] =

app/src/cli.c

@@ -32,7 +32,6 @@ enum {
     OPT_WINDOW_BORDERLESS,
     OPT_MAX_FPS,
     OPT_LOCK_VIDEO_ORIENTATION,
-    OPT_DISPLAY,
     OPT_DISPLAY_ID,
     OPT_ROTATION,
     OPT_RENDER_DRIVER,
@@ -86,7 +85,6 @@ enum {
     OPT_LIST_CAMERA_SIZES,
     OPT_CAMERA_ID,
     OPT_CAMERA_SIZE,
-    OPT_CAMERA_FACING,
 };
 
 struct sc_option {
@@ -205,18 +203,13 @@ static const struct sc_option options[] = {
     },
     {
         .longopt_id = OPT_CAMERA_ID,
-        .longopt = "camera-id",
+        .longopt = "camera",
         .argdesc = "id",
-        .text = "Specify the device camera id to mirror.\n"
+        .text = "Specify the device camera id to mirror when using "
+                "--video-source=camera.\n"
                 "The available camera ids can be listed by:\n"
-                "    scrcpy --list-cameras",
-    },
-    {
-        .longopt_id = OPT_CAMERA_FACING,
-        .longopt = "camera-facing",
-        .argdesc = "facing",
-        .text = "Select the device camera by its facing direction.\n"
-                "Possible values are \"front\", \"back\" and \"external\".",
+                "    scrcpy --list-cameras\n"
+                "Default is \"auto\" (the first one)",
     },
     {
         .longopt_id = OPT_CAMERA_SIZE,
@@ -259,15 +252,9 @@ static const struct sc_option options[] = {
         .longopt = "disable-screensaver",
         .text = "Disable screensaver while scrcpy is running.",
     },
-    {
-        // deprecated
-        .longopt_id = OPT_DISPLAY,
-        .longopt = "display",
-        .argdesc = "id",
-    },
     {
         .longopt_id = OPT_DISPLAY_ID,
-        .longopt = "display-id",
+        .longopt = "display",
         .argdesc = "id",
         .text = "Specify the device display id to mirror.\n"
                 "The available display ids can be listed by:\n"
@@ -1707,34 +1694,6 @@ parse_audio_source(const char *optarg, enum sc_audio_source *source) {
     return false;
 }
 
-static bool
-parse_camera_facing(const char *optarg, enum sc_camera_facing *facing) {
-    if (!strcmp(optarg, "front")) {
-        *facing = SC_CAMERA_FACING_FRONT;
-        return true;
-    }
-
-    if (!strcmp(optarg, "back")) {
-        *facing = SC_CAMERA_FACING_BACK;
-        return true;
-    }
-
-    if (!strcmp(optarg, "external")) {
-        *facing = SC_CAMERA_FACING_EXTERNAL;
-        return true;
-    }
-
-    if (*optarg == '\0') {
-        // Empty string is a valid value (equivalent to not passing the option)
-        *facing = SC_CAMERA_FACING_ANY;
-        return true;
-    }
-
-    LOGE("Unsupported camera facing: %s (expected front, back or external)",
-         optarg);
-    return false;
-}
-
 static bool
 parse_time_limit(const char *s, sc_tick *tick) {
     long value;
@@ -1797,9 +1756,6 @@ parse_args_with_getopt(struct scrcpy_cli_args *args, int argc, char *argv[],
             case OPT_CROP:
                 opts->crop = optarg;
                 break;
-            case OPT_DISPLAY:
-                LOGW("--display is deprecated, use --display-id instead.");
-                // fall through
             case OPT_DISPLAY_ID:
                 if (!parse_display_id(optarg, &opts->display_id)) {
                     return false;
@@ -2135,11 +2091,6 @@ parse_args_with_getopt(struct scrcpy_cli_args *args, int argc, char *argv[],
             case OPT_CAMERA_SIZE:
                 opts->camera_size = optarg;
                 break;
-            case OPT_CAMERA_FACING:
-                if (!parse_camera_facing(optarg, &opts->camera_facing)) {
-                    return false;
-                }
-                break;
             default:
                 // getopt prints the error message on stderr
                 return false;
@@ -2240,6 +2191,12 @@ parse_args_with_getopt(struct scrcpy_cli_args *args, int argc, char *argv[],
             return false;
         }
 
+        if (!opts->camera_id) {
+            LOGE("Camera id must be specified by --camera=ID "
+                 "(list the available ids with --list-cameras)");
+            return false;
+        }
+
         if (!opts->camera_size) {
             LOGE("Camera size must be specified by --camera-size=WIDTHxHEIGHT");
             return false;

app/src/options.c

@@ -21,7 +21,6 @@ const struct scrcpy_options scrcpy_options_default = {
     .record_format = SC_RECORD_FORMAT_AUTO,
     .keyboard_input_mode = SC_KEYBOARD_INPUT_MODE_INJECT,
     .mouse_input_mode = SC_MOUSE_INPUT_MODE_INJECT,
-    .camera_facing = SC_CAMERA_FACING_ANY,
     .port_range = {
         .first = DEFAULT_LOCAL_PORT_RANGE_FIRST,
         .last = DEFAULT_LOCAL_PORT_RANGE_LAST,

app/src/options.h

@@ -55,13 +55,6 @@ enum sc_audio_source {
     SC_AUDIO_SOURCE_MIC,
 };
 
-enum sc_camera_facing {
-    SC_CAMERA_FACING_ANY,
-    SC_CAMERA_FACING_FRONT,
-    SC_CAMERA_FACING_BACK,
-    SC_CAMERA_FACING_EXTERNAL,
-};
-
 enum sc_lock_video_orientation {
     SC_LOCK_VIDEO_ORIENTATION_UNLOCKED = -1,
     // lock the current orientation when scrcpy starts
@@ -140,7 +133,6 @@ struct scrcpy_options {
     enum sc_record_format record_format;
     enum sc_keyboard_input_mode keyboard_input_mode;
     enum sc_mouse_input_mode mouse_input_mode;
-    enum sc_camera_facing camera_facing;
     struct sc_port_range port_range;
     uint32_t tunnel_host;
     uint16_t tunnel_port;

app/src/scrcpy.c

@@ -353,7 +353,6 @@ scrcpy(struct scrcpy_options *options) {
         .audio_codec = options->audio_codec,
         .video_source = options->video_source,
         .audio_source = options->audio_source,
-        .camera_facing = options->camera_facing,
         .crop = options->crop,
         .port_range = options->port_range,
         .tunnel_host = options->tunnel_host,

app/src/server.c

@@ -183,20 +183,6 @@ sc_server_get_codec_name(enum sc_codec codec) {
     }
 }
 
-static const char *
-sc_server_get_camera_facing_name(enum sc_camera_facing camera_facing) {
-    switch (camera_facing) {
-        case SC_CAMERA_FACING_FRONT:
-            return "front";
-        case SC_CAMERA_FACING_BACK:
-            return "back";
-        case SC_CAMERA_FACING_EXTERNAL:
-            return "external";
-        default:
-            return NULL;
-    }
-}
-
 static sc_pid
 execute_server(struct sc_server *server,
                const struct sc_server_params *params) {
@@ -299,10 +285,6 @@ execute_server(struct sc_server *server,
     if (params->camera_size) {
         ADD_PARAM("camera_size=%s", params->camera_size);
     }
-    if (params->camera_facing != SC_CAMERA_FACING_ANY) {
-        ADD_PARAM("camera_facing=%s",
-            sc_server_get_camera_facing_name(params->camera_facing));
-    }
     if (params->show_touches) {
         ADD_PARAM("show_touches=true");
     }

app/src/server.h

@@ -28,7 +28,6 @@ struct sc_server_params {
     enum sc_codec audio_codec;
     enum sc_video_source video_source;
     enum sc_audio_source audio_source;
-    enum sc_camera_facing camera_facing;
     const char *crop;
     const char *video_codec_options;
     const char *audio_codec_options;

app/src/usb/hid_keyboard.c

@@ -27,8 +27,7 @@
 // keyboard support, though OS could support more keys via modifying the report
 // desc. 6 should be enough for scrcpy.
 #define HID_KEYBOARD_MAX_KEYS 6
-#define HID_KEYBOARD_EVENT_SIZE \
-    (HID_KEYBOARD_INDEX_KEYS + HID_KEYBOARD_MAX_KEYS)
+#define HID_KEYBOARD_EVENT_SIZE (2 + HID_KEYBOARD_MAX_KEYS)
 
 #define HID_RESERVED 0x00
 #define HID_ERROR_ROLL_OVER 0x01

app/tests/test_str.c

@@ -269,25 +269,21 @@ static void test_parse_integer_with_suffix(void) {
 
     char buf[32];
 
-    int r = snprintf(buf, sizeof(buf), "%ldk", LONG_MAX / 2000);
-    assert(r >= 0 && (size_t) r < sizeof(buf));
+    sprintf(buf, "%ldk", LONG_MAX / 2000);
     ok = sc_str_parse_integer_with_suffix(buf, &value);
     assert(ok);
     assert(value == LONG_MAX / 2000 * 1000);
 
-    r = snprintf(buf, sizeof(buf), "%ldm", LONG_MAX / 2000);
-    assert(r >= 0 && (size_t) r < sizeof(buf));
+    sprintf(buf, "%ldm", LONG_MAX / 2000);
     ok = sc_str_parse_integer_with_suffix(buf, &value);
     assert(!ok);
 
-    r = snprintf(buf, sizeof(buf), "%ldk", LONG_MIN / 2000);
-    assert(r >= 0 && (size_t) r < sizeof(buf));
+    sprintf(buf, "%ldk", LONG_MIN / 2000);
     ok = sc_str_parse_integer_with_suffix(buf, &value);
     assert(ok);
     assert(value == LONG_MIN / 2000 * 1000);
 
-    r = snprintf(buf, sizeof(buf), "%ldm", LONG_MIN / 2000);
-    assert(r >= 0 && (size_t) r < sizeof(buf));
+    sprintf(buf, "%ldm", LONG_MIN / 2000);
     ok = sc_str_parse_integer_with_suffix(buf, &value);
     assert(!ok);
 }

doc/video.md

@@ -143,7 +143,7 @@ If several displays are available on the Android device, it is possible to
 select the display to mirror:
 
 ```bash
-scrcpy --display-id=1
+scrcpy --display=1
 ```
 
 The list of display ids can be retrieved by:

server/src/main/java/com/genymobile/scrcpy/CameraCapture.java

@@ -6,9 +6,7 @@ import android.annotation.SuppressLint;
 import android.annotation.TargetApi;
 import android.hardware.camera2.CameraAccessException;
 import android.hardware.camera2.CameraCaptureSession;
-import android.hardware.camera2.CameraCharacteristics;
 import android.hardware.camera2.CameraDevice;
-import android.hardware.camera2.CameraManager;
 import android.hardware.camera2.CaptureFailure;
 import android.hardware.camera2.CaptureRequest;
 import android.hardware.camera2.params.OutputConfiguration;
@@ -28,25 +26,7 @@ import java.util.concurrent.atomic.AtomicBoolean;
 
 public class CameraCapture extends SurfaceCapture {
 
-    public static class CameraSelection {
-        private String explicitCameraId;
-        private CameraFacing cameraFacing;
-
-        public CameraSelection(String explicitCameraId, CameraFacing cameraFacing) {
-            this.explicitCameraId = explicitCameraId;
-            this.cameraFacing = cameraFacing;
-        }
-
-        boolean hasId() {
-            return explicitCameraId != null;
-        }
-
-        boolean hasProperties() {
-            return cameraFacing != null;
-        }
-    }
-
-    private final CameraSelection cameraSelection;
+    private final String cameraId;
     private final Size explicitSize;
 
     private HandlerThread cameraThread;
@@ -56,8 +36,8 @@ public class CameraCapture extends SurfaceCapture {
 
     private final AtomicBoolean disconnected = new AtomicBoolean();
 
-    public CameraCapture(CameraSelection cameraSelection, Size explicitSize) {
-        this.cameraSelection = cameraSelection;
+    public CameraCapture(String cameraId, Size explicitSize) {
+        this.cameraId = cameraId;
         this.explicitSize = explicitSize;
     }
 
@@ -69,49 +49,12 @@ public class CameraCapture extends SurfaceCapture {
         cameraExecutor = new HandlerExecutor(cameraHandler);
 
         try {
-            String cameraId = selectCamera(cameraSelection);
-            if (cameraId == null) {
-                throw new IOException("No matching camera found");
-            }
-
-            Ln.i("Using camera '" + cameraId + "'");
             cameraDevice = openCamera(cameraId);
         } catch (CameraAccessException | InterruptedException e) {
             throw new IOException(e);
         }
     }
 
-    private String selectCamera(CameraSelection cameraSelection) throws CameraAccessException {
-        if (cameraSelection.hasId()) {
-            return cameraSelection.explicitCameraId;
-        }
-
-        CameraManager cameraManager = ServiceManager.getCameraManager();
-
-        String[] cameraIds = cameraManager.getCameraIdList();
-        if (!cameraSelection.hasProperties()) {
-            // Use the first one
-            return cameraIds.length > 0 ? cameraIds[0] : null;
-        }
-
-        for (String cameraId : cameraIds) {
-            CameraCharacteristics characteristics = cameraManager.getCameraCharacteristics(cameraId);
-
-            if (cameraSelection.cameraFacing != null) {
-                int facing = characteristics.get(CameraCharacteristics.LENS_FACING);
-                if (cameraSelection.cameraFacing.value() != facing) {
-                    // Does not match
-                    continue;
-                }
-            }
-
-            return cameraId;
-        }
-
-        // Not found
-        return null;
-    }
-
     @Override
     public void start(Surface surface) throws IOException {
         try {

server/src/main/java/com/genymobile/scrcpy/CameraFacing.java

@@ -1,31 +0,0 @@
-package com.genymobile.scrcpy;
-
-import android.hardware.camera2.CameraCharacteristics;
-
-public enum CameraFacing {
-    FRONT("front", CameraCharacteristics.LENS_FACING_FRONT),
-    BACK("back", CameraCharacteristics.LENS_FACING_BACK),
-    EXTERNAL("external", CameraCharacteristics.LENS_FACING_EXTERNAL);
-
-    private final String name;
-    private final int value;
-
-    CameraFacing(String name, int value) {
-        this.name = name;
-        this.value = value;
-    }
-
-    int value() {
-        return value;
-    }
-
-    static CameraFacing findByName(String name) {
-        for (CameraFacing facing : CameraFacing.values()) {
-            if (name.equals(facing.name)) {
-                return facing;
-            }
-        }
-
-        return null;
-    }
-}

server/src/main/java/com/genymobile/scrcpy/LogUtils.java

@@ -54,7 +54,7 @@ public final class LogUtils {
             builder.append("\n    (none)");
         } else {
             for (int id : displayIds) {
-                builder.append("\n    --display-id=").append(id).append("    (");
+                builder.append("\n    --display=").append(id).append("    (");
                 DisplayInfo displayInfo = displayManager.getDisplayInfo(id);
                 if (displayInfo != null) {
                     Size size = displayInfo.getSize();
@@ -90,7 +90,7 @@ public final class LogUtils {
                 builder.append("\n    (none)");
             } else {
                 for (String id : cameraIds) {
-                    builder.append("\n    --video-source=camera --camera-id=").append(id);
+                    builder.append("\n    --video-source=camera --camera=").append(id);
                     CameraCharacteristics characteristics = cameraManager.getCameraCharacteristics(id);
                     int facing = characteristics.get(CameraCharacteristics.LENS_FACING);
                     builder.append("    (").append(getCameraFacingName(facing)).append(", ");

server/src/main/java/com/genymobile/scrcpy/Options.java

@@ -26,7 +26,6 @@ public class Options {
     private int displayId;
     private String cameraId;
     private Size cameraSize;
-    private CameraFacing cameraFacing;
     private boolean showTouches;
     private boolean stayAwake;
     private List<CodecOption> videoCodecOptions;
@@ -127,10 +126,6 @@ public class Options {
         return cameraSize;
     }
 
-    public CameraFacing getCameraFacing() {
-        return cameraFacing;
-    }
-
     public boolean getShowTouches() {
         return showTouches;
     }
@@ -297,9 +292,7 @@ public class Options {
                     options.tunnelForward = Boolean.parseBoolean(value);
                     break;
                 case "crop":
-                    if (!value.isEmpty()) {
-                        options.crop = parseCrop(value);
-                    }
+                    options.crop = parseCrop(value);
                     break;
                 case "control":
                     options.control = Boolean.parseBoolean(value);
@@ -356,22 +349,11 @@ public class Options {
                     options.listCameraSizes = Boolean.parseBoolean(value);
                     break;
                 case "camera_id":
-                    if (!value.isEmpty()) {
-                        options.cameraId = value;
-                    }
+                    options.cameraId = value;
                     break;
                 case "camera_size":
                     options.cameraSize = parseSize(value);
                     break;
-                case "camera_facing":
-                    if (!value.isEmpty()) {
-                        CameraFacing facing = CameraFacing.findByName(value);
-                        if (facing == null) {
-                            throw new IllegalArgumentException("Camera facing " + value + " not supported");
-                        }
-                        options.cameraFacing = facing;
-                    }
-                    break;
                 case "send_device_meta":
                     options.sendDeviceMeta = Boolean.parseBoolean(value);
                     break;
@@ -403,6 +385,9 @@ public class Options {
     }
 
     private static Rect parseCrop(String crop) {
+        if (crop.isEmpty()) {
+            return null;
+        }
         // input format: "width:height:x:y"
         String[] tokens = crop.split(":");
         if (tokens.length != 4) {

server/src/main/java/com/genymobile/scrcpy/Server.java

@@ -138,9 +138,7 @@ public final class Server {
                 if (options.getVideoSource() == VideoSource.DISPLAY) {
                     surfaceCapture = new ScreenCapture(device);
                 } else {
-                    CameraCapture.CameraSelection cameraSelection = new CameraCapture.CameraSelection(options.getCameraId(),
-                            options.getCameraFacing());
-                    surfaceCapture = new CameraCapture(cameraSelection, options.getCameraSize());
+                    surfaceCapture = new CameraCapture(options.getCameraId(), options.getCameraSize());
                 }
                 SurfaceEncoder surfaceEncoder = new SurfaceEncoder(surfaceCapture, videoStreamer, options.getVideoBitRate(), options.getMaxFps(),
                         options.getVideoCodecOptions(), options.getVideoEncoder(), options.getDownsizeOnError());