These is the beginning o a method I am using to merge videos together
-(void) mergeVideosAndAudio:(AVAsset *)audioAsset{
//Load Video Assets
NSError *error;
NSArray *dirFiles;
if ((dirFiles = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:[self documentsDirectory] error:&error]) == nil) {
// handle the error
};
// find all the temp files
NSArray *movFiles = [dirFiles filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:@"self BEGINSWITH 'temp'"]];
NSLog(@"The are %i temp files",movFiles.count);
//Create assets array
NSMutableArray *assets = [[NSMutableArray alloc]init];
for (int i = 0; i < movFiles.count; i++) {
NSString *videoURL = [[self documentsDirectory] stringByAppendingPathComponent:
[NSString stringWithFormat:@"temp%i.mov", i]];
NSURL *url = [NSURL fileURLWithPath:videoURL];
AVURLAsset *videoAsset = [AVURLAsset URLAssetWithURL:url options:nil];
[assets addObject:videoAsset];
}
NSLog(@"assets:%i ", assets.count);
// a second way
for (id obj in assets)
NSLog(@"obj: %@", obj);
//Create the composition
AVMutableComposition *mixComposition = [[AVMutableComposition alloc] init];
// 1 - Video track
AVMutableCompositionTrack *firstTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeVideo
preferredTrackID:kCMPersistentTrackID_Invalid];
CMTime videoTrackDuration;
for (int j = 0; j < assets.count; j++) {
AVURLAsset *currentAsset = assets[j];
videoTrackDuration = CMTimeAdd(videoTrackDuration, currentAsset.duration);
CMTime time;
if (j == 0) {
time = kCMTimeZero;
}else{
AVURLAsset *previousAsset = assets[j-1];
time = previousAsset.duration;
}
AVAssetTrack *assetTrack = [[currentAsset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0];
[firstTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, currentAsset.duration) ofTrack:assetTrack atTime:time error:nil];
}
The problem I am having is that the tracksWithMediaType
property of currentAsset is an empty array.
Here is the console
Any help will be greatly appreciated. Thanks
Have you seen this link?
I'm working on a solution now that KVO's the tracks key:
[item addObserver:self forKeyPath:kTracksKey options:opts context:nil];
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