合并音视频
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内容:
http://www.raywenderlich.com/13418/how-to-play-record-edit-videos-in-ios?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed:+RayWenderlich+(Ray+Wenderlich+|+iPhone+Developer+and+Gamer)
工程:
http://www.raywenderlich.com/13418/how-to-play-record-edit-videos-in-ios/videoplayrecord
VideoPlayRecord
视频 裁剪 合并 ios
这个编写出来的。
原文是合并视频.而我的项目要求是裁剪视频,所以我跟他的代码实现了自己的需求而已。
目前这块代码应该是能给视频里面添加logo之类的东西。但是我目前没实现,网上的代码我也暂时没找到。
- (void) loadVideoByPath:(NSString*) v_strVideoPath andSavePath:(NSString*) v_strSavePath {
NSLog(@"\nv_strVideoPath = %@ \nv_strSavePath = %@\n ",v_strVideoPath,v_strSavePath);
AVAsset *avAsset = [AVAsset assetWithURL:[NSURL fileURLWithPath:v_strVideoPath]];
CMTime assetTime = [avAsset duration];
Float64 duration = CMTimeGetSeconds(assetTime);
NSLog(@"视频时长 %f\n",duration);
AVMutableComposition *avMutableComposition = [AVMutableComposition composition];
AVMutableCompositionTrack *avMutableCompositionTrack = [avMutableComposition addMutableTrackWithMediaType:AVMediaTypeVideo preferredTrackID:kCMPersistentTrackID_Invalid];
AVAssetTrack *avAssetTrack = [[avAsset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0];
NSError *error = nil;
// 这块是裁剪,rangtime .前面的是开始时间,后面是裁剪多长 (我这裁剪的是从第二秒开始裁剪,裁剪2.55秒时长.)
[avMutableCompositionTrack insertTimeRange:CMTimeRangeMake(CMTimeMakeWithSeconds(2.0f, 30), CMTimeMakeWithSeconds(2.55f, 30))
ofTrack:avAssetTrack
atTime:kCMTimeZero
error:&error];
AVMutableVideoComposition *avMutableVideoComposition = [[AVMutableVideoComposition videoComposition] retain];
// 这个视频大小可以由你自己设置。比如源视频640*480.而你这320*480.最后出来的是320*480这么大的,640多出来的部分就没有了。并非是把图片压缩成那么大了。
avMutableVideoComposition.renderSize = CGSizeMake(320.0f, 480.0f);
avMutableVideoComposition.frameDuration = CMTimeMake(1, 30);
// 这句话暂时不用理会,我正在看是否能添加logo而已。
[self addDataToVideoByTool:avMutableVideoComposition.animationTool];
AVMutableVideoCompositionInstruction *avMutableVideoCompositionInstruction = [AVMutableVideoCompositionInstruction videoCompositionInstruction];
[avMutableVideoCompositionInstruction setTimeRange:CMTimeRangeMake(kCMTimeZero, [avMutableComposition duration])];
AVMutableVideoCompositionLayerInstruction *avMutableVideoCompositionLayerInstruction = [AVMutableVideoCompositionLayerInstruction videoCompositionLayerInstructionWithAssetTrack:avAssetTrack];
[avMutableVideoCompositionLayerInstruction setTransform:avAssetTrack.preferredTransform atTime:kCMTimeZero];
avMutableVideoCompositionInstruction.layerInstructions = [NSArray arrayWithObject:avMutableVideoCompositionLayerInstruction];
avMutableVideoComposition.instructions = [NSArray arrayWithObject:avMutableVideoCompositionInstruction];
NSFileManager *fm = [[NSFileManager alloc] init];
if ([fm fileExistsAtPath:v_strSavePath]) {
NSLog(@"video is have. then delete that");
if ([fm removeItemAtPath:v_strSavePath error:&error]) {
NSLog(@"delete is ok");
}else {