.h
#import <Foundation/Foundation.h>
#import <AVFoundation/AVFoundation.h>
#import <AssetsLibrary/AssetsLibrary.h>
#import <UIKit/UIKit.h>
typedef void(^VideoBuildCompletion) (NSString *videoPath);
@interface VideoBuilder : NSObject
- (void)makeVideoWithImage:(UIImage *)image
audio:(NSString *)audioFile
completion:(VideoBuildCompletion)completion;
@end
.m
#import "VideoBuilder.h"
#import "STLSFileManager.h"
typedef void(^successBlock)(void);
typedef void(^failBlock)(NSError *error);
typedef void(^exportAsynchronouslyWithCompletionHandler)(void);
typedef void(^convertToMp4Completed)(void);
@interface VideoBuilder ()
@property (nonatomic, strong) AVAssetWriter *videoWriter;
@property (nonatomic, strong) AVAssetWriterInputPixelBufferAdaptor *adaptor;
@property (nonatomic, strong) AVAssetWriterInput *writerInput;
@property (nonatomic, assign) NSInteger frameNumber;
@property (nonatomic, assign) CGSize videoSize;
@property (nonatomic, strong) NSString *videoPath;
@property (nonatomic, assign) int32_t timeScale;
@property (nonatomic, strong) NSString *audioFile;
@end
@implementation VideoBuilder
- (void)maskFinishWithSuccess:(successBlock)success Fail:(failBlock)fail {
[self.writerInput markAsFinished];
[self.videoWriter finishWritingWithCompletionHandler:^{
if (self.videoWriter.status != AVAssetReaderStatusFailed && self.videoWriter.status == AVAssetWriterStatusCompleted) {
if (success) {
success();
}
} else {
if (fail) {
fail(_videoWriter.error);
}
NSLog(@"create video failed, %@",self.videoWriter.error);
}
}];
CVPixelBufferPoolRelease(self.adaptor.pixelBufferPool);
}
//初始化写入流 AVAssetWriter
- (void)initWriter{
NSString *videoOutputPath = [[[STLSFileManager sharedFileManager] tempVideoFilesFolder] stringByAppendingString:[NSString stringWithFormat:@"/%@.output.mov",[[self.audioFile stringByDeletingPathExtension] lastPathComponent]]];
_videoSize = CGSizeMake(160, 90);
_videoPath = videoOutputPath;
_timeScale = 1;
NSError *fileError;
if ([[NSFileManager defaultManager] removeItemAtPath:self.videoPath error:&fileError]) {
}
NSError *error = nil;
//告诉AVAssetWriter 文件保存路径、文件type
self.videoWriter = [[AVAssetWriter alloc]initWithURL:[NSURL fileURLWithPath:_videoPath]
fileType:AVFileTypeQuickTimeMovie
error:&error];
NSParameterAssert(self.videoWriter);
//视频的基本设置，编码格式、宽、高
NSDictionary *videoSettings = [NSDictionary dictionaryWithObjectsAndKeys:
AVVideoCodecH264,AVVideoCodecKey,
[NSNumber numberWithInt:_videoSize.width],AVVideoWidthKey,
[NSNumber numberWithInt:_videoSize.height],AVVideoHeightKey,
nil];
//根据定义好的视频格式定义输入流
self.writerInput = [AVAssetWriterInput assetWriterInputWithMediaType:AVMediaTypeVideo
outputSettings:videoSettings];
// expectsMediaDataInRealTime设置为YES, 表示实时获取摄像头和麦克风采集到的视频数据和音频数据
self.writerInput.expectsMediaDataInRealTime = YES;
//AVAssetWriterInputPixelBufferAdaptor负责将图片转成的缓存数据CVPixelBufferRef追加到AVAssetWriterInput中。
self.adaptor = [AVAssetWriterInputPixelBufferAdaptor
assetWriterInputPixelBufferAdaptorWithAssetWriterInput:self.writerInput
sourcePixelBufferAttributes:nil];
NSParameterAssert(self.writerInput);
NSParameterAssert([self.videoWriter canAddInput:self.writerInput]);
[self.videoWriter addInput:self.writerInput];
[self.videoWriter startWriting];
[self.videoWriter startSessionAtSourceTime:kCMTimeZero];
}
//将图片合成为视频
- (void)convertVideoWithImageArray:(NSArray *)images Success:(successBlock)success Fail:(failBlock)fail {
[self initWriter];
// GCD 异步
dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
dispatch_async(queue, ^{
//获取音频的时长
AVURLAsset* audioAsse = [[AVURLAsset alloc]initWithURL:[NSURL fileURLWithPath:self.audioFile] options:nil];
CMTime cmtime = audioAsse.duration;
NSUInteger dTotalSeconds = CMTimeGetSeconds(cmtime);
double numberOfSecondsPerFrame = dTotalSeconds/[images count];
if (numberOfSecondsPerFrame == 0) {
numberOfSecondsPerFrame = 1;
}
double frameDuration = self.timeScale * numberOfSecondsPerFrame;
int i;
CVPixelBufferRef buffer = NULL;
for ( i = 0; i < [images count];) {
if (self.writerInput.readyForMoreMediaData) {
//CMTimeMake(a,b) a当前第几帧, b每秒钟多少帧.当前播放时间a/b
CMTime frameTime = CMTimeMake(1,self.timeScale);
CMTime lastTime = CMTimeMake(i*frameDuration,self.timeScale);
CMTime presentTime = CMTimeAdd(lastTime, frameTime);
if (i == 0) {
presentTime = CMTimeMake(0,self.timeScale);
}
buffer = [self pixelBufferFromCGImage:[images[i] CGImage]];
if (buffer) {
//添加视频流
if ([self.adaptor appendPixelBuffer:buffer withPresentationTime:lastTime]) {
i++;
}else{
[self maskFinishWithSuccess:success Fail:fail];
break;
}
CVPixelBufferRelease(buffer);
}
}
}
if (i == images.count) {
[self maskFinishWithSuccess:success Fail:fail];
}
});
}
// 将声音添加到视频里面
- (void)addAudioToVideoAudioPath:(NSString *)audioPath Completion:(exportAsynchronouslyWithCompletionHandler)completion {
//初始化audioAsset
AVURLAsset* audioAsset = [[AVURLAsset alloc]initWithURL:[NSURL fileURLWithPath:audioPath] options:nil];
//初始化videoAsset
AVURLAsset* videoAsset = [[AVURLAsset alloc]initWithURL:[NSURL fileURLWithPath:self.videoPath] options:nil];
//初始化合成类
AVMutableComposition* mixComposition = [AVMutableComposition composition];
//初始化设置轨道type为AVMediaTypeAudio
AVMutableCompositionTrack *compositionCommentaryTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeAudio preferredTrackID:kCMPersistentTrackID_Invalid];
//根据音频时常添加到设置里面
[compositionCommentaryTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, audioAsset.duration) ofTrack:[[audioAsset tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0] atTime:kCMTimeZero error:nil];
//初始化设置轨道type为VideoTrack
AVMutableCompositionTrack *compositionVideoTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeVideo preferredTrackID:kCMPersistentTrackID_Invalid];
//设置视频时长等
[compositionVideoTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, videoAsset.duration)ofTrack:[[videoAsset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0] atTime:kCMTimeZero error:nil];
//初始化导出类
AVAssetExportSession* assetExport = [[AVAssetExportSession alloc] initWithAsset:mixComposition presetName:AVAssetExportPresetPassthrough];
//导出路径
NSString *exportPath = self.videoPath;
NSURL *exportUrl = [NSURL fileURLWithPath:exportPath];
if ([[NSFileManager defaultManager] fileExistsAtPath:exportPath])
{
[[NSFileManager defaultManager] removeItemAtPath:exportPath error:nil];
}
assetExport.outputFileType = AVFileTypeQuickTimeMovie;
assetExport.outputURL = exportUrl;
assetExport.shouldOptimizeForNetworkUse = YES;
//导出
[assetExport exportAsynchronouslyWithCompletionHandler:completion];
}
- (void)convertToMP4Completed:(convertToMp4Completed)Completed
{
NSString *filePath = self.videoPath;
NSString *mp4FilePath = [filePath stringByReplacingOccurrencesOfString:@"mov" withString:@"mp4"];
dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
dispatch_async(queue, ^{
AVURLAsset *avAsset = [AVURLAsset URLAssetWithURL:[NSURL fileURLWithPath:filePath] options:nil];
NSArray *compatiblePresets = [AVAssetExportSession exportPresetsCompatibleWithAsset:avAsset];
if ([compatiblePresets containsObject:AVAssetExportPresetHighestQuality]) {
AVAssetExportSession *exportSession = [[AVAssetExportSession alloc] initWithAsset:avAsset presetName:AVAssetExportPresetHighestQuality];
exportSession.outputURL = [NSURL fileURLWithPath:mp4FilePath];
exportSession.outputFileType = AVFileTypeMPEG4;
if ([[NSFileManager defaultManager] fileExistsAtPath:mp4FilePath])
{
[[NSFileManager defaultManager] removeItemAtPath:mp4FilePath error:nil];
}
[exportSession exportAsynchronouslyWithCompletionHandler:^(void)
{
switch (exportSession.status) {
case AVAssetExportSessionStatusUnknown: {
NSLog(@"AVAssetExportSessionStatusUnknown");
break;
}
case AVAssetExportSessionStatusWaiting: {
NSLog(@"AVAssetExportSessionStatusWaiting");
break;
}
case AVAssetExportSessionStatusExporting: {
NSLog(@"AVAssetExportSessionStatusExporting");
break;
}
case AVAssetExportSessionStatusFailed: {
NSLog(@"AVAssetExportSessionStatusFailed error:%@", exportSession.error);
break;
}
case AVAssetExportSessionStatusCompleted: {
NSLog(@"AVAssetExportSessionStatusCompleted");
dispatch_async(dispatch_get_main_queue(),^{
Completed();
});
break;
}
default: {
NSLog(@"AVAssetExportSessionStatusCancelled");
break;
}
}
}];
}
});
}
- (CVPixelBufferRef)pixelBufferFromCGImage:(CGImageRef)image {
CGFloat w = CGImageGetWidth(image);
CGFloat h = CGImageGetHeight(image);
NSLog(@"%f,%f",w,h);
if (w >= h) {
} else {
CGFloat t = w;
w = h;
h = t;
}
if (image) {
CGSize size = CGSizeMake(400, 320);
NSDictionary *options = [NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithBool:YES], kCVPixelBufferCGImageCompatibilityKey,
[NSNumber numberWithBool:YES], kCVPixelBufferCGBitmapContextCompatibilityKey,
nil];
CVPixelBufferRef pxbuffer = NULL;
CVReturn status = CVPixelBufferCreate(kCFAllocatorDefault,
size.width,
size.height,
kCVPixelFormatType_32ARGB,
(__bridge CFDictionaryRef) options,
&pxbuffer);
if (status != kCVReturnSuccess){
NSLog(@"Failed to create pixel buffer");
}
CVPixelBufferLockBaseAddress(pxbuffer, 0);
void *pxdata = CVPixelBufferGetBaseAddress(pxbuffer);
CGColorSpaceRef rgbColorSpace = CGColorSpaceCreateDeviceRGB();
CGContextRef context = CGBitmapContextCreate(pxdata, size.width,
size.height, 8, 4*size.width, rgbColorSpace,
kCGImageAlphaPremultipliedFirst);
//kCGImageAlphaNoneSkipFirst);
CGContextConcatCTM(context, CGAffineTransformMakeRotation(0));
CGContextDrawImage(context, CGRectMake(0, 0, CGImageGetWidth(image),
CGImageGetHeight(image)), image);
CGColorSpaceRelease(rgbColorSpace);
CGContextRelease(context);
CVPixelBufferUnlockBaseAddress(pxbuffer, 0);
return pxbuffer;
} else {
return NULL;
}
}
- (void)makeVideoWithImage:(UIImage *)image
audio:(NSString *)audioFile
completion:(VideoBuildCompletion)completion{
//获取音频的本地路径
self.audioFile = audioFile;
__weak __typeof(self) weakSelf = self;
[self convertVideoWithImageArray:@[image,image,image,image,image,image] Success:^{
__strong __typeof(weakSelf) strongSelf = weakSelf;
__weak __typeof(strongSelf) weakweakSelf = strongSelf;
[strongSelf addAudioToVideoAudioPath:audioFile Completion:^{
__strong __typeof(weakweakSelf) strongstrongSelf = weakweakSelf;
[strongstrongSelf convertToMP4Completed:^{
if (completion) {
completion(strongstrongSelf.videoPath);
}
}];
}];
} Fail:^(NSError *error) {
}];
}
@end
@end
