-
Notifications
You must be signed in to change notification settings - Fork 6
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
-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。
- Loading branch information
Showing
4 changed files
with
148 additions
and
3 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
29 changes: 29 additions & 0 deletions
29
...meraPickerControllerDEMO/LFCameraPickerControllerDEMO/class/Tools/LFCameraRecorderTools.h
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -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 |
98 changes: 98 additions & 0 deletions
98
...meraPickerControllerDEMO/LFCameraPickerControllerDEMO/class/Tools/LFCameraRecorderTools.m
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -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 |