合并iPhone应用程序中的两个视频文件 [英] Merge Two Video files in iPhone Application
本文介绍了合并iPhone应用程序中的两个视频文件的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
在我的一个应用程序中，我需要在视频中添加一些图像。所以我分两部分切断视频，并从该图像制作一个视频。现在我想结合这三个视频文件，制作一个视频文件。但我不知道将这三个视频结合起来。我在这里看到一些代码。但这对我没有帮助。现在，我希望代码合并所有视频，以便在视频文件中放置当前视图屏幕。介于。
用于中断视频文件
NSURL * url = [NSURL fileURLWithPath：[[NSBundle mainBundle] pathForResource：@AffagogatoofType：@mp4]];
AVURLAsset * anAsset = [[AVURLAsset alloc] initWithURL：url options：nil];
for（int i = 0; i< 2; i ++）{
AVAssetExportSession * exportSession = [[AVAssetExportSession alloc]
initWithAsset：anAsset presetName：AVAssetExportPresetLowQuality];
NSString * filePath = nil;
NSUInteger count = 0;
do {
filePath = NSTemporaryDirectory（）;
NSString * numberString = count> 0？ [NSString stringWithFormat：@ - ％i，count]：@;
filePath = [filePath stringByAppendingPathComponent：[NSString stringWithFormat：@Output - ％@。mov，numberString]];
count ++;
} while（[[NSFileManager defaultManager] fileExistsAtPath：filePath]）;
exportSession.outputURL = [NSURL fileURLWithPath：filePath];
exportSession.outputFileType = AVFileTypeQuickTimeMovie;
CMTimeRange范围;
if（i == 0）{
CMTime start = CMTimeMakeWithSeconds（0.0,600）;
CMTime duration = CMTimeMakeWithSeconds（10.0,600）;
range = CMTimeRangeMake（开始，持续时间）;
} else {
CMTime start = CMTimeMakeWithSeconds（10.0,600）;
range = CMTimeRangeMake（start，anAsset.duration）;
}
exportSession.timeRange = range;
[exportSession exportAsynchronouslyWithCompletionHandler：^
{
dispatch_async（dispatch_get_main_queue（），^ {
[self exportDidFinish：exportSession Tag：i];
}） ;
}];
}
从图片中获取视频
CGRect rect = CGRectMake（0,0,320,480）;
view = [[UIView alloc] initWithFrame：rect];
NSArray * paths = NSSearchPathForDirectoriesInDomains（NSDocumentDirectory，NSUserDomainMask，YES）;
NSString * documentsDirectory =（[路径计数]> 0）？ [paths objectAtIndex：0]：nil;
NSString * path = [documentsDirectory stringByAppendingPathComponent：[@video2stringByAppendingString：@。mov]];
CGSize size = self.view.frame.size;
NSMutableDictionary * attributes = [[NSMutableDictionary alloc] init];
[attributes setObject：[NSNumber numberWithUnsignedInt：kCVPixelFormatType_32ARGB] forKey：（NSString *）kCVPixelBufferPixelFormatTypeKey];
[attributes setObject：[NSNumber numberWithUnsignedInt：320] forKey：（NSString *）kCVPixelBufferWidthKey];
[attributes setObject：[NSNumber numberWithUnsignedInt：480] forKey：（NSString *）kCVPixelBufferHeightKey];
NSError * error = nil;
AVAssetWriter * videoWriter = [[AVAssetWriter alloc] initWithURL：
[NSURL fileURLWithPath：path] fileType：AVFileTypeQuickTimeMovie
error：& error];
NSParameterAssert（videoWriter）;
NSDictionary * videoSettings = [NSDictionary dictionaryWithObjectsAndKeys：
AVVideoCodecH264，AVVideoCodecKey，
[NSNumber numberWithInt：size.width]，AVVideoWidthKey，
[NSNumber numberWithInt：size.height]，AVVideoHeightKey，
nil];
AVAssetWriterInput * writerInput = [[AVAssetWriterInput
assetWriterInputWithMediaType：AVMediaTypeVideo
outputSettings：videoSettings] retain];
AVAssetWriterInputPixelBufferAdaptor * adapter = [AVAssetWriterInputPixelBufferAdaptor
assetWriterInputPixelBufferAdaptorWithAssetWriterInput：writerInput
sourcePixelBufferAttributes：nil];
NSParameterAssert（writerInput）;
NSParameterAssert（[videoWriter canAddInput：writerInput]）;
[videoWriter addInput：writerInput];
//开始一个会话：
[videoWriter startWriting];
[videoWriter startSessionAtSourceTime：kCMTimeZero];
CVPixelBufferRef buffer = NULL;
//将uiimage转换为CGImage。
xPixel = 0;
yPixel = 250;
buffer = [self pixelBufferFromCGImage：[[UIImage imageNamed：@1.jpeg] CGImage]];
CVPixelBufferPoolCreatePixelBuffer（NULL，adaptor.pixelBufferPool，& buffer）;
[adapter appendPixelBuffer：buffer withPresentationTime：kCMTimeZero];
for（int i = 0; i< 2; i ++）
{
if（[writerInput isReadyForMoreMediaData]）
{
// NSLog（ @inside for loop％d，i）;
for（int pframetime = 1; pframetime< = 2; pframetime ++）
{
CMTime frameTime = CMTimeMake（pframetime，25）;
CMTime lastTime = CMTimeMake（i，1）; // i是
以上循环的0到19 CMTime presentTime = CMTimeAdd（lastTime，frameTime）;
if（i == 0）
buffer = [self pixelBufferFromCGImage：[[UIImage imageNamed：@1.jpeg] CGImage]];
else
buffer = [self pixelBufferFromCGImage：[[UIImage imageNamed：@2.jpeg] CGImage]];
while（！[writerInput isReadyForMoreMediaData]）
{
[NSThread sleepForTimeInterval：0.05];
}
[adapter appendPixelBuffer：buffer withPresentationTime：presentTime];
i ++;
}
if（buffer）
CVBufferRelease（buffer）;
// [NSThread sleepForTimeInterval：0.1];
}
}
[writerInput markAsFinished];
[videoWriter finishWriting];
[videoPathArray addObject：path];
//完成会话：
[videoWriter release];
[writerInput release];
CVPixelBufferPoolRelease（adaptor.pixelBufferPool）;
对于合并视频文件我尝试使用此代码，但这里没有用处是视频之间的一些空白屏幕
AVMutableComposition * mixComposition = [AVMutableComposition composition];
NSString * documentsDirectoryPath = [NSSearchPathForDirectoriesInDomains（NSDocumentDirectory，NSUserDomainMask，YES）objectAtIndex：0];
NSString * video_inputFilePath1 = [videoPathArray objectAtIndex：1];
NSURL * video_inputFileUrl1 = [NSURL fileURLWithPath：video_inputFilePath1];
NSString * video_inputFilePath2 = [videoPathArray objectAtIndex：0];
NSURL * video_inputFileUrl2 = [NSURL fileURLWithPath：video_inputFilePath2];
NSString * video_inputFilePath3 = [videoPathArray objectAtIndex：2];
NSURL * video_inputFileUrl3 = [NSURL fileURLWithPath：video_inputFilePath3];
NSString * outputFileName = @outputFile.mov;
NSString * outputFilePath = [NSString stringWithFormat：@％@ /％@，documentsDirectoryPath，outputFileName];
NSURL * outputFileUrl = [NSURL fileURLWithPath：outputFilePath];
if（[[NSFileManager defaultManager] fileExistsAtPath：outputFilePath]）
[[NSFileManager defaultManager] removeItemAtPath：outputFilePath error：nil];
CMTime nextClipStartTime = kCMTimeZero;
AVURLAsset * videoAsset1 = [[AVURLAsset alloc] initWithURL：video_inputFileUrl1 options：nil];
AVURLAsset * videoAsset2 = [[AVURLAsset alloc] initWithURL：video_inputFileUrl2 options：nil];
AVURLAsset * videoAsset3 = [[AVURLAsset alloc] initWithURL：video_inputFileUrl3 options：nil];
CMTimeRange video_timeRange1 = CMTimeRangeMake（kCMTimeZero，videoAsset1.duration）;
AVMutableCompositionTrack * a_compositionVideoTrack1 = [mixComposition addMutableTrackWithMediaType：AVMediaTypeVideo preferredTrackID：kCMPersistentTrackID_Invalid];
[a_compositionVideoTrack1 insertTimeRange：video_timeRange1 ofTrack：[[videoAsset1 tracksWithMediaType：AVMediaTypeVideo] objectAtIndex：0] atTime：nextClipStartTime error：nil];
CMTimeRange video_timeRange3 = CMTimeRangeMake（nextClipStartTime，videoAsset3.duration）;
[a_compositionVideoTrack1 insertTimeRange：video_timeRange3 ofTrack：[[videoAsset3 tracksWithMediaType：AVMediaTypeVideo] objectAtIndex：0] atTime：videoAsset1.duration error：nil];
CMTimeRange video_timeRange2 = CMTimeRangeMake（nextClipStartTime，videoAsset1.duration）;
[a_compositionVideoTrack1 insertTimeRange：video_timeRange2 ofTrack：[[videoAsset2 tracksWithMediaType：AVMediaTypeVideo] objectAtIndex：0] atTime：videoAsset1.duration error：nil];
AVAssetExportSession * _assetExport = [[AVAssetExportSession alloc] initWithAsset：mixComposition presetName：AVAssetExportPresetLowQuality];
_assetExport.shouldOptimizeForNetworkUse = YES;
_assetExport.outputFileType = @com.apple.quicktime-movie;
_assetExport.outputURL = outputFileUrl;
解决方案
尝试观看名为在AV中使用媒体的视频基金会在苹果开发者门户网站。它告诉你如何做你正在描述的事情。
https://developer.apple.com/videos/wwdc/2011/
In One of my application i need to add some image in video. so i cut break video in two part and also make one video from that image. now i want to combine this three video file and make one video file. but i am not get any idea to combine this three video. i see some code over here. but that is not helpful to me. for break video and for make video from image i used below code now i want code to merge this all video.
Any other idea for put current view screen in video file in between.
For break video file
NSURL *url = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"Affagogato" ofType:@"mp4"]];
AVURLAsset *anAsset = [[AVURLAsset alloc] initWithURL:url options:nil];
for(int i = 0; i < 2; i++) {
AVAssetExportSession *exportSession = [[AVAssetExportSession alloc]
initWithAsset:anAsset presetName:AVAssetExportPresetLowQuality];
NSString *filePath = nil;
NSUInteger count = 0;
do {
filePath = NSTemporaryDirectory();
NSString *numberString = count > 0 ? [NSString stringWithFormat:@"-%i", count] : @"";
filePath = [filePath stringByAppendingPathComponent:[NSString stringWithFormat:@"Output-%@.mov", numberString]];
count++;
} while([[NSFileManager defaultManager] fileExistsAtPath:filePath]);
exportSession.outputURL = [NSURL fileURLWithPath:filePath];
exportSession.outputFileType = AVFileTypeQuickTimeMovie;
CMTimeRange range;
if(i == 0){
CMTime start = CMTimeMakeWithSeconds(0.0, 600);
CMTime duration = CMTimeMakeWithSeconds(10.0, 600);
range = CMTimeRangeMake(start, duration);
}else{
CMTime start = CMTimeMakeWithSeconds(10.0, 600);
range = CMTimeRangeMake(start, anAsset.duration);
}
exportSession.timeRange = range;
[exportSession exportAsynchronouslyWithCompletionHandler:^
{
dispatch_async(dispatch_get_main_queue(), ^{
[self exportDidFinish:exportSession Tag:i];
});
}];
}
Get video from Images
CGRect rect=CGRectMake(0, 0, 320, 480);
view = [[UIView alloc]initWithFrame:rect];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = ([paths count] > 0) ? [paths objectAtIndex:0] : nil;
NSString *path = [documentsDirectory stringByAppendingPathComponent:[@"video2" stringByAppendingString:@".mov"]];
CGSize size = self.view.frame.size;
NSMutableDictionary *attributes = [[NSMutableDictionary alloc]init];
[attributes setObject:[NSNumber numberWithUnsignedInt:kCVPixelFormatType_32ARGB] forKey:(NSString*)kCVPixelBufferPixelFormatTypeKey];
[attributes setObject:[NSNumber numberWithUnsignedInt:320] forKey:(NSString*)kCVPixelBufferWidthKey];
[attributes setObject:[NSNumber numberWithUnsignedInt:480] forKey:(NSString*)kCVPixelBufferHeightKey];
NSError *error = nil;
AVAssetWriter *videoWriter = [[AVAssetWriter alloc] initWithURL:
[NSURL fileURLWithPath:path] fileType:AVFileTypeQuickTimeMovie
error:&error];
NSParameterAssert(videoWriter);
NSDictionary *videoSettings = [NSDictionary dictionaryWithObjectsAndKeys:
AVVideoCodecH264, AVVideoCodecKey,
[NSNumber numberWithInt:size.width], AVVideoWidthKey,
[NSNumber numberWithInt:size.height], AVVideoHeightKey,
nil];
AVAssetWriterInput* writerInput = [[AVAssetWriterInput
assetWriterInputWithMediaType:AVMediaTypeVideo
outputSettings:videoSettings] retain];
AVAssetWriterInputPixelBufferAdaptor *adaptor = [AVAssetWriterInputPixelBufferAdaptor
assetWriterInputPixelBufferAdaptorWithAssetWriterInput:writerInput
sourcePixelBufferAttributes:nil];
NSParameterAssert(writerInput);
NSParameterAssert([videoWriter canAddInput:writerInput]);
[videoWriter addInput:writerInput];
//Start a session:
[videoWriter startWriting];
[videoWriter startSessionAtSourceTime:kCMTimeZero];
CVPixelBufferRef buffer = NULL;
//convert uiimage to CGImage.
xPixel=0;
yPixel=250;
buffer = [self pixelBufferFromCGImage:[[UIImage imageNamed:@"1.jpeg"] CGImage]];
CVPixelBufferPoolCreatePixelBuffer (NULL, adaptor.pixelBufferPool, &buffer);
[adaptor appendPixelBuffer:buffer withPresentationTime:kCMTimeZero];
for (int i = 0;i<2; i++)
{
if([writerInput isReadyForMoreMediaData])
{
//NSLog(@"inside for loop %d",i);
for(int pframetime=1;pframetime<=2;pframetime++)
{
CMTime frameTime = CMTimeMake(pframetime,25);
CMTime lastTime=CMTimeMake(i,1); //i is from 0 to 19 of the loop above
CMTime presentTime=CMTimeAdd(lastTime, frameTime);
if(i==0)
buffer = [self pixelBufferFromCGImage:[[UIImage imageNamed:@"1.jpeg"] CGImage]];
else
buffer = [self pixelBufferFromCGImage:[[UIImage imageNamed:@"2.jpeg"] CGImage]];
while ( ![writerInput isReadyForMoreMediaData] )
{
[NSThread sleepForTimeInterval:0.05];
}
[adaptor appendPixelBuffer:buffer withPresentationTime:presentTime];
i++;
}
if(buffer)
CVBufferRelease(buffer);
//[NSThread sleepForTimeInterval:0.1];
}
}
[writerInput markAsFinished];
[videoWriter finishWriting];
[videoPathArray addObject:path];
//Finish the session:
[videoWriter release];
[writerInput release];
CVPixelBufferPoolRelease(adaptor.pixelBufferPool);
For Merge video files i try this code but not useful here is some blank screen between video
AVMutableComposition* mixComposition = [AVMutableComposition composition];
NSString *documentsDirectoryPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString* video_inputFilePath1 = [videoPathArray objectAtIndex:1];
NSURL* video_inputFileUrl1 = [NSURL fileURLWithPath:video_inputFilePath1];
NSString* video_inputFilePath2 = [videoPathArray objectAtIndex:0];
NSURL* video_inputFileUrl2 = [NSURL fileURLWithPath:video_inputFilePath2];
NSString* video_inputFilePath3 = [videoPathArray objectAtIndex:2];
NSURL* video_inputFileUrl3 = [NSURL fileURLWithPath:video_inputFilePath3];
NSString* outputFileName = @"outputFile.mov";
NSString* outputFilePath = [NSString stringWithFormat:@"%@/%@",documentsDirectoryPath,outputFileName];
NSURL* outputFileUrl = [NSURL fileURLWithPath:outputFilePath];
if ([[NSFileManager defaultManager] fileExistsAtPath:outputFilePath])
[[NSFileManager defaultManager] removeItemAtPath:outputFilePath error:nil];
CMTime nextClipStartTime = kCMTimeZero;
AVURLAsset* videoAsset1 = [[AVURLAsset alloc]initWithURL:video_inputFileUrl1 options:nil];
AVURLAsset* videoAsset2 = [[AVURLAsset alloc]initWithURL:video_inputFileUrl2 options:nil];
AVURLAsset* videoAsset3 = [[AVURLAsset alloc]initWithURL:video_inputFileUrl3 options:nil];
CMTimeRange video_timeRange1 = CMTimeRangeMake(kCMTimeZero,videoAsset1.duration);
AVMutableCompositionTrack *a_compositionVideoTrack1 = [mixComposition addMutableTrackWithMediaType:AVMediaTypeVideo preferredTrackID:kCMPersistentTrackID_Invalid];
[a_compositionVideoTrack1 insertTimeRange:video_timeRange1 ofTrack:[[videoAsset1 tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0] atTime:nextClipStartTime error:nil];
CMTimeRange video_timeRange3 = CMTimeRangeMake(nextClipStartTime,videoAsset3.duration);
[a_compositionVideoTrack1 insertTimeRange:video_timeRange3 ofTrack:[[videoAsset3 tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0] atTime:videoAsset1.duration error:nil];
CMTimeRange video_timeRange2 = CMTimeRangeMake(nextClipStartTime,videoAsset1.duration);
[a_compositionVideoTrack1 insertTimeRange:video_timeRange2 ofTrack:[[videoAsset2 tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0] atTime:videoAsset1.duration error:nil];
AVAssetExportSession* _assetExport = [[AVAssetExportSession alloc] initWithAsset:mixComposition presetName:AVAssetExportPresetLowQuality];
_assetExport.shouldOptimizeForNetworkUse = YES;
_assetExport.outputFileType = @"com.apple.quicktime-movie";
_assetExport.outputURL = outputFileUrl;
解决方案
Try watching the video called "Working with Media in AV Foundation" in the apple developers portal. It tells you how to do what you are describing.
https://developer.apple.com/videos/wwdc/2011/
这篇关于合并iPhone应用程序中的两个视频文件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
查看全文
