-SCRecorder没有对1080P以上的相机更新。但它的扩展性很好。可以在不影响其代码的情况下对1080P以上的相机兼容。

Author: lincf0912

LFCameraPickerControllerDEMO/LFCameraPickerControllerDEMO.xcodeproj/project.pbxproj

@@ -7,6 +7,7 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
+		3B5E9F09244845C10069E1C8 /* LFCameraRecorderTools.m in Sources */ = {isa = PBXBuildFile; fileRef = 3B5E9F08244845C10069E1C8 /* LFCameraRecorderTools.m */; };
 		6F05EE291EC44B1C006FC1BF /* main.m in Sources */ = {isa = PBXBuildFile; fileRef = 6F05EE281EC44B1C006FC1BF /* main.m */; };
 		6F05EE2C1EC44B1C006FC1BF /* AppDelegate.m in Sources */ = {isa = PBXBuildFile; fileRef = 6F05EE2B1EC44B1C006FC1BF /* AppDelegate.m */; };
 		6F05EE2F1EC44B1C006FC1BF /* ViewController.m in Sources */ = {isa = PBXBuildFile; fileRef = 6F05EE2E1EC44B1C006FC1BF /* ViewController.m */; };
@@ -30,6 +31,8 @@
 
 /* Begin PBXFileReference section */
 		1A6A91C38ED318A2C9956E69 /* libPods-LFCameraPickerControllerDEMO.a */ = {isa = PBXFileReference; explicitFileType = archive.ar; includeInIndex = 0; path = "libPods-LFCameraPickerControllerDEMO.a"; sourceTree = BUILT_PRODUCTS_DIR; };
+		3B5E9F07244845C10069E1C8 /* LFCameraRecorderTools.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = LFCameraRecorderTools.h; sourceTree = "<group>"; };
+		3B5E9F08244845C10069E1C8 /* LFCameraRecorderTools.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = LFCameraRecorderTools.m; sourceTree = "<group>"; };
 		424631D3E6B6637347970A73 /* Pods-LFCameraPickerControllerDEMO.debug.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-LFCameraPickerControllerDEMO.debug.xcconfig"; path = "../Pods/Target Support Files/Pods-LFCameraPickerControllerDEMO/Pods-LFCameraPickerControllerDEMO.debug.xcconfig"; sourceTree = "<group>"; };
 		6F05EE241EC44B1C006FC1BF /* LFCameraPickerControllerDEMO.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = LFCameraPickerControllerDEMO.app; sourceTree = BUILT_PRODUCTS_DIR; };
 		6F05EE281EC44B1C006FC1BF /* main.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = main.m; sourceTree = "<group>"; };
@@ -88,6 +91,15 @@
 			name = Pods;
 			sourceTree = "<group>";
 		};
+		3B5E9F06244845AB0069E1C8 /* Tools */ = {
+			isa = PBXGroup;
+			children = (
+				3B5E9F07244845C10069E1C8 /* LFCameraRecorderTools.h */,
+				3B5E9F08244845C10069E1C8 /* LFCameraRecorderTools.m */,
+			);
+			path = Tools;
+			sourceTree = "<group>";
+		};
 		6F05EE1B1EC44B1C006FC1BF = {
 			isa = PBXGroup;
 			children = (
@@ -146,6 +158,7 @@
 		6FAA50591ED2BB30002D88A2 /* class */ = {
 			isa = PBXGroup;
 			children = (
+				3B5E9F06244845AB0069E1C8 /* Tools */,
 				6FAA505A1ED2BB30002D88A2 /* Category */,
 				6FAA505E1ED2BB30002D88A2 /* Controller */,
 				6F359B031F1C4D8C009F2035 /* view */,
@@ -367,6 +380,7 @@
 				6FAA50711ED2BB30002D88A2 /* LFCameraPickerController.m in Sources */,
 				6F05EE2F1EC44B1C006FC1BF /* ViewController.m in Sources */,
 				6F9F32A21F7CC1B3004B6438 /* LFCameraPlayerView.m in Sources */,
+				3B5E9F09244845C10069E1C8 /* LFCameraRecorderTools.m in Sources */,
 				6FAA506E1ED2BB30002D88A2 /* LFCameraTakeViewController.m in Sources */,
 				6F359B061F1C4D8C009F2035 /* LFCameraWatermarkOverlayView.m in Sources */,
 				6FAA506F1ED2BB30002D88A2 /* LFCameraHeader.m in Sources */,

LFCameraPickerControllerDEMO/LFCameraPickerControllerDEMO/class/Controller/LFCameraTakeViewController.m

@@ -12,6 +12,8 @@
 #import "LFCameraDisplayController.h"
 #import "LFCameraWatermarkOverlayView.h"
 
+#import "LFCameraRecorderTools.h"
+
 #import "UIImage+LFCamera_Orientation.h"
 
 #import "LFRecordButton.h"
@@ -742,7 +744,7 @@ - (void)initRecorder
 
     _recorder = [SCRecorder recorder];
     if ([cameraPicker.cameraPreset isEqualToString:AVCaptureSessionPresetAuto]) {
-        _recorder.captureSessionPreset = [SCRecorderTools bestCaptureSessionPresetCompatibleWithAllDevices];
+        _recorder.captureSessionPreset = [LFCameraRecorderTools bestCaptureSessionPresetCompatibleWithAllDevices:(CMTimeScale)cameraPicker.framerate];
     } else {
         _recorder.captureSessionPreset = cameraPicker.cameraPreset;
     }
@@ -775,7 +777,8 @@ - (void)initRecorder
 
     _recorder.delegate = self;
     //    _recorder.autoSetVideoOrientation = YES; //YES causes bad orientation for video from camera roll
-    //    _recorder.videoConfiguration.size = CGSizeMake(640, 480);
+    _recorder.videoConfiguration.profileLevel = AVVideoProfileLevelH264HighAutoLevel;
+    _recorder.videoConfiguration.bitrate = [LFCameraRecorderTools bitrateWithCaptureSessionPreset:_recorder.captureSessionPreset];
 
 
     UIView *previewView = self.previewView;
@@ -803,7 +806,8 @@ - (void)initRecorder
 
     NSError *error;
 
-    [_recorder setActiveFormatWithFrameRate:(CMTimeScale)cameraPicker.framerate error:&error];
+    CMVideoDimensions videoDimensions = [LFCameraRecorderTools bestVideoDimensionsWithAllDevices:(CMTimeScale)cameraPicker.framerate];
+    [_recorder setActiveFormatWithFrameRate:(CMTimeScale)cameraPicker.framerate width:videoDimensions.width andHeight:videoDimensions.height error:&error];
     if (error) {
         NSLog(@"set frameRate error: %@", error.localizedDescription);
     }

LFCameraPickerControllerDEMO/LFCameraPickerControllerDEMO/class/Tools/LFCameraRecorderTools.h

@@ -0,0 +1,29 @@
+//
+//  LFCameraRecorderTools.h
+//  LFCameraPickerControllerDEMO
+//
+//  Created by TsanFeng Lam on 2020/4/16.
+//  Copyright © 2020 LamTsanFeng. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+#import <AVFoundation/AVFoundation.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface LFCameraRecorderTools : NSObject
+
+/**
+ Returns the best session preset that is compatible with all available video
+ devices (front and back camera). It will ensure that buffer output from
+ both camera has the same resolution.
+ */
++ (NSString *__nonnull)bestCaptureSessionPresetCompatibleWithAllDevices:(CMTimeScale)frameRate;
+
++ (CMVideoDimensions)bestVideoDimensionsWithAllDevices:(CMTimeScale)frameRate;
+
+
++ (UInt64)bitrateWithCaptureSessionPreset:(NSString *)preset;
+@end
+
+NS_ASSUME_NONNULL_END

LFCameraPickerControllerDEMO/LFCameraPickerControllerDEMO/class/Tools/LFCameraRecorderTools.m

@@ -0,0 +1,98 @@
+//
+//  LFCameraRecorderTools.m
+//  LFCameraPickerControllerDEMO
+//
+//  Created by TsanFeng Lam on 2020/4/16.
+//  Copyright © 2020 LamTsanFeng. All rights reserved.
+//
+
+#import "LFCameraRecorderTools.h"
+
+@implementation LFCameraRecorderTools
+
++ (NSString *)captureSessionPresetForDimension:(CMVideoDimensions)videoDimension {
+    
+    if (@available(iOS 9.0, *)) {
+        if (videoDimension.width >= 3840 && videoDimension.height >= 2160) {
+            return AVCaptureSessionPreset3840x2160;
+        }
+    }
+    if (videoDimension.width >= 1920 && videoDimension.height >= 1080) {
+        return AVCaptureSessionPreset1920x1080;
+    }
+    if (videoDimension.width >= 1280 && videoDimension.height >= 720) {
+        return AVCaptureSessionPreset1280x720;
+    }
+    if (videoDimension.width >= 640 && videoDimension.height >= 480) {
+        return AVCaptureSessionPreset640x480;
+    }
+    if (videoDimension.width >= 352 && videoDimension.height >= 288) {
+        return AVCaptureSessionPreset352x288;
+    }
+    
+    return AVCaptureSessionPresetHigh;
+}
+
++ (CMVideoDimensions)bestVideoDimensionsWithAllDevices:(CMTimeScale)frameRate {
+    NSArray *videoDevices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];
+
+    CMVideoDimensions highestCompatibleDimension = (CMVideoDimensions){0, 0};
+    BOOL lowestSet = NO;
+    
+    for (AVCaptureDevice *device in videoDevices) {
+        CMVideoDimensions highestDeviceDimension;
+        highestDeviceDimension.width = 0;
+        highestDeviceDimension.height = 0;
+        
+        for (AVCaptureDeviceFormat *format in device.formats) {
+            CMVideoDimensions dimension = CMVideoFormatDescriptionGetDimensions(format.formatDescription);
+            
+            if (dimension.width * dimension.height > highestDeviceDimension.width * highestDeviceDimension.height) {
+                for (AVFrameRateRange *range in format.videoSupportedFrameRateRanges) {
+                    if (range.minFrameDuration.timescale >= frameRate && range.maxFrameDuration.timescale <= frameRate) {
+                        highestDeviceDimension = dimension;
+                    }
+                }
+            }
+        }
+        
+        if (!lowestSet || (highestCompatibleDimension.width * highestCompatibleDimension.height > highestDeviceDimension.width * highestDeviceDimension.height)) {
+            lowestSet = YES;
+            highestCompatibleDimension = highestDeviceDimension;
+        }
+        
+    }
+    return highestCompatibleDimension;
+}
+
++ (NSString *)bestCaptureSessionPresetCompatibleWithAllDevices:(CMTimeScale)frameRate
+{
+    CMVideoDimensions highestCompatibleDimension = [self bestVideoDimensionsWithAllDevices:frameRate];
+
+    return [self captureSessionPresetForDimension:highestCompatibleDimension];
+}
+
++ (UInt64)bitrateWithCaptureSessionPreset:(NSString *)preset
+{
+    if (@available(iOS 9.0, *)) {
+        if ([preset isEqualToString:AVCaptureSessionPreset3840x2160]) {
+            return 31000000;
+        }
+    }
+    if ([preset isEqualToString:AVCaptureSessionPreset1920x1080]) {
+        return 7900000;
+    }
+    if ([preset isEqualToString:AVCaptureSessionPreset1280x720]) {
+        return 3500000;
+    }
+    if ([preset isEqualToString:AVCaptureSessionPreset640x480]) {
+        return 1200000;
+    }
+    if ([preset isEqualToString:AVCaptureSessionPreset352x288]) {
+        return 770000;
+    }
+    
+    return 3500000;
+}
+
+@end