Ios AVMutableComposition中的视频方向已更改
我用avmutablecomposition合并了四个肖像视频。但最终的视频方向改为横向。视频的尺寸是720x1280 我多次检查以解决该问题，但我的解决方案不起作用 这是我的密码：Ios AVMutableComposition中的视频方向已更改,ios,objective-c,avfoundation,avmutablecomposition,Ios,Objective C,Avfoundation,Avmutablecomposition,我用avmutablecomposition合并了四个肖像视频。但最终的视频方向改为横向。视频的尺寸是720x1280 我多次检查以解决该问题，但我的解决方案不起作用 这是我的密码： AVMutableComposition *composition = [AVMutableComposition composition]; AVMutableCompositionTrack *compositionVideoTrack = [composition addMutableTrac
AVMutableComposition *composition = [AVMutableComposition composition];
AVMutableCompositionTrack *compositionVideoTrack = [composition addMutableTrackWithMediaType:AVMediaTypeVideo preferredTrackID:kCMPersistentTrackID_Invalid];
AVMutableCompositionTrack *compositionAudioTrack = [composition addMutableTrackWithMediaType:AVMediaTypeAudio preferredTrackID:kCMPersistentTrackID_Invalid];
AVMutableVideoComposition *videoComposition = [AVMutableVideoComposition videoComposition];
videoComposition.frameDuration = CMTimeMake(1,30);
videoComposition.renderScale = 1.0;
AVMutableVideoCompositionInstruction *instruction = [AVMutableVideoCompositionInstruction videoCompositionInstruction];
AVMutableVideoCompositionLayerInstruction *layerInstruction = [AVMutableVideoCompositionLayerInstruction videoCompositionLayerInstructionWithAssetTrack:compositionVideoTrack];
NSLog(@"%@",videoPathArray);
// Get only paths the user selected
NSMutableArray *array = [NSMutableArray array];
for(NSString* string in videoPathArray){
if(![string isEqualToString:@""]){
[array addObject:string];
}
}
videoPathArray = array;
float time = 0;
CMTime startTime = kCMTimeZero;
for (int i = 0; i<videoPathArray.count; i++) {
AVURLAsset *sourceAsset = [AVURLAsset URLAssetWithURL:[NSURL fileURLWithPath:[videoPathArray objectAtIndex:i]] options:[NSDictionary dictionaryWithObject:[NSNumber numberWithBool:YES] forKey:AVURLAssetPreferPreciseDurationAndTimingKey]];
NSError *error = nil;
if ([[sourceAsset tracksWithMediaType:AVMediaTypeVideo] count] != 0){
BOOL ok = NO;
AVAssetTrack *sourceVideoTrack = [[sourceAsset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0];
AVAssetTrack *sourceAudioTrack = [[sourceAsset tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0];
CGSize temp = CGSizeApplyAffineTransform(sourceVideoTrack.naturalSize, sourceVideoTrack.preferredTransform);
CGSize size = CGSizeMake(fabsf(temp.width), fabsf(temp.height));
CGAffineTransform transform = sourceVideoTrack.preferredTransform;
videoComposition.renderSize = sourceVideoTrack.naturalSize;
if (size.width > size.height) {
[layerInstruction setTransform:transform atTime:CMTimeMakeWithSeconds(time, 30)];
} else {
float s = size.width/size.height;
CGAffineTransform newOne = CGAffineTransformConcat(transform, CGAffineTransformMakeScale(s,s));
float x = (size.height - size.width*s)/2;
CGAffineTransform newer = CGAffineTransformConcat(newOne, CGAffineTransformMakeTranslation(x, 0));
[layerInstruction setTransform:newer atTime:CMTimeMakeWithSeconds(time, 30)];
}
if(i == 0 )
{
[compositionVideoTrack setPreferredTransform:sourceVideoTrack.preferredTransform];
}
ok = [compositionVideoTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, [sourceAsset duration]) ofTrack:sourceVideoTrack atTime:startTime error:&error];
ok = [compositionAudioTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, [sourceAsset duration]) ofTrack:sourceAudioTrack atTime:startTime error:nil];
if (!ok) {
{
[radialView4 setHidden:YES];
NSLog(@"Export failed: %@", [[self.exportSession error] localizedDescription]);
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Error" message:@"Something Went Wrong :(" delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles: nil, nil];
[alert show];
[radialView4 setHidden:YES];
break;
}
}
NSLog(@"\n source asset duration is %f \n source vid track timerange is %f %f \n composition duration is %f \n composition vid track time range is %f %f",CMTimeGetSeconds([sourceAsset duration]), CMTimeGetSeconds(sourceVideoTrack.timeRange.start),CMTimeGetSeconds(sourceVideoTrack.timeRange.duration),CMTimeGetSeconds([composition duration]), CMTimeGetSeconds(compositionVideoTrack.timeRange.start),CMTimeGetSeconds(compositionVideoTrack.timeRange.duration));
startTime = CMTimeAdd(startTime, [sourceAsset duration]);
}
}
instruction.layerInstructions = [NSArray arrayWithObject:layerInstruction];
instruction.timeRange = compositionVideoTrack.timeRange;
videoComposition.instructions = [NSArray arrayWithObject:instruction];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *myPathDocs = [documentsDirectory stringByAppendingPathComponent:
[NSString stringWithFormat:@"RampMergedVideo.mov"]];
unlink([myPathDocs UTF8String]);
NSURL *url = [NSURL fileURLWithPath:myPathDocs];
AVAssetExportSession *exporter = [[AVAssetExportSession alloc] initWithAsset:composition
presetName:AVAssetExportPreset1280x720];
exporter.outputURL=url;
exporter.outputFileType = AVFileTypeQuickTimeMovie;
exporter.shouldOptimizeForNetworkUse = YES;
[exporter exportAsynchronouslyWithCompletionHandler:^{
dispatch_async(dispatch_get_main_queue(), ^{
switch ([exporter status]) {
case AVAssetExportSessionStatusFailed:
NSLog(@"Export failed: %@", [exporter error]);
break;
case AVAssetExportSessionStatusCancelled:
NSLog(@"Export canceled");
break;
case AVAssetExportSessionStatusCompleted:{
break;
}
default:
break;
}
if (exporter.status != AVAssetExportSessionStatusCompleted){
NSLog(@"Retry export");
}
});
}];
AVMutableComposition*composition=[AVMutableComposition]；
AVMutableCompositionTrack*compositionVideoTrack=[composition addMutableTrackWithMediaType:AVMediaTypeVideo preferredTrackID:kCMPersistentTrackID_无效]；
AVMutableCompositionTrack*compositionAudioTrack=[CompositionAddMutableTrackWithMediaType:AVMediaTypeAudio preferredTrackID:kCMPersistentTrackID_无效]；
AVMutableVideoComposition*videoComposition=[AVMutableVideoComposition]；
videoComposition.frameDuration=CMTimeMake（1,30）；
videoComposition.renderScale=1.0；
AVMutableVideoCompositionInstruction*指令=[AVMutableVideoCompositionInstruction videoCompositionInstruction]；
AvmutableVideoCompositionLayerStruction*LayerStruction=[AvmutableVideoCompositionLayerStruction VideoCompositionLayerStructionWithAssetTrack:compositionVideoTrack]；
NSLog（@“%@”，视频路径阵列）；
//仅获取用户选择的路径
NSMutableArray*数组=[NSMutableArray]；
for（视频路径阵列中的NSString*字符串）{
如果（！[string IsequalString:@”“）{
[数组addObject:string]；
}
}
videoPathArray=阵列；
浮动时间=0；
CMTime startTime=KCMTIME0；
用于（int i=0；i size.height）{
[层结构设置转换：转换时间：CMTimeMakeWithSeconds（时间，30）]；
}否则{
浮动s=尺寸.宽度/尺寸.高度；
CGAffineTransform newOne=CGAffineTransformConcat（变换，CGAffineTransformMakeScale（s，s））；
浮动x=（size.height-size.width*s）/2；
CGAffineTransform newer=CGAffineTransformConcat（newOne，CGAffineTransformMakeTransform makeTranslation（x，0））；
[layerInstruction setTransform:LayerAttime:CMTimeMakeWithSeconds（时间，30）]；
}
如果（i==0）
{
[compositionVideoTrack setPreferredTransform:sourceVideoTrack.preferredTransform]；
}
ok=[compositionVideoTrack insertTimeRange:CMTimeRangeMake（kCMTimeZero，[sourceAsset duration]）of Track:sourceVideoTrack时间：起始时间错误：&error]；
ok=[compositionAudioTrack insertTimeRange:CMTimeRangeMake（kCMTimeZero，[sourceAsset duration]）of Track:sourceAudioTrack时间：startTime错误：nil]；
如果（！ok）{
{
[radialView4设置隐藏：是]；
NSLog（@“导出失败：%@，[[self.exportSession error]localizedDescription]）；
UIAlertView*alert=[[UIAlertView alloc]initWithTitle:@“错误”消息：@“出现问题：”（“委托：nil CancelButtontile:@“确定”其他Buttontiles:nil，nil]；
[警报显示]；
[radialView4设置隐藏：是]；
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}
}
NSLog（@“\n源资产持续时间为%f\n源视频曲目时间范围为%f%f\n合成持续时间为%f\n合成视频曲目时间范围为%f%f”、CMTimeGetSeconds（[sourceAsset duration]）、CMTimeGetSeconds（sourceVideoTrack.timerange.start）、CMTimeGetSeconds（sourceVideoTrack.timerange.duration）、CMTimeGetSeconds（[composition duration]），CMTimeGetSeconds（compositionVideoTrack.timeRange.start），CMTimeGetSeconds（compositionVideoTrack.timeRange.duration））；
startTime=CMTimeAdd（startTime，[sourceAsset duration]）；
}
}
instruction.layerInstructions=[NSArray arrayWithObject:layerInstruction]；
instruction.timeRange=compositionVideoTrack.timeRange；
videoComposition.instructions=[NSArray arrayWithObject:instruction]；
NSArray*Path=NSSearchPathForDirectoriesInDomains（NSDocumentDirectory，NSUserDomainMask，是）；
NSString*documentsDirectory=[paths objectAtIndex:0]；
NSString*myPathDocs=[DocumentsDirectoryStringByAppendingPathComponent:
[NSString stringWithFormat:@“RampMergedVideo.mov”]；
取消链接（[myPathDocs UTF8String]）；
NSURL*url=[NSURL fileURLWithPath:myPathDocs]；
AVAssetExportSession*导出器=[[AVAssetExportSession alloc]initWithAsset:composition
预设名称：AVAssetExportPreset1280x720]；
exporter.outputURL=url；
exporter.outputFileType=AVFileTypeQuickTimeMovie；
exporter.shouldOptimizationForNetworkUse=是；
[exporter exportAsynchronouslyWithCompletionHandler:^{
dispatch\u async（dispatch\u get\u main\u queue（）^{
开关（[导出器状态]）{
案例AvassetExportSessionStatus失败：
NSLog（@“导出失败：%@，[导出程序错误]）；
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案例AvassetExportSessionStatus取消：
NSLog（“导出已取消”）；
打破
案例AvassetExportSessionStatus已完成：{
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}
违约：
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}
if（exporter.status！=AVAssetExportSessionStatusCompleted）{
NSLog（@“重试导出”）；
}
});
}];