I have one recorded video and i want to save it as a new video with 1.5 playback speed(fast-forward) in ios sdk . Can anyone please suggest how can i achieve this functionality?
Thanks
Yashesh
AVURLAsset* videoAsset = nil; //self.inputAsset;
//create mutable composition
AVMutableComposition *mixComposition = [AVMutableComposition composition];
AVMutableCompositionTrack *compositionVideoTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeVideo
preferredTrackID:kCMPersistentTrackID_Invalid];
NSError *videoInsertError = nil;
BOOL videoInsertResult = [compositionVideoTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, videoAsset.duration)
ofTrack:[[videoAsset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0]
atTime:kCMTimeZero
error:&videoInsertError];
if (!videoInsertResult || nil != videoInsertError) {
//handle error
return;
}
//slow down whole video by 2.0
double videoScaleFactor = 2.0;
CMTime videoDuration = videoAsset.duration;
[compositionVideoTrack scaleTimeRange:CMTimeRangeMake(kCMTimeZero, videoDuration)
toDuration:CMTimeMake(videoDuration.value*videoScaleFactor, videoDuration.timescale)];
//export
AVAssetExportSession* assetExport = [[AVAssetExportSession alloc] initWithAsset:mixComposition
presetName:AVAssetExportPresetLowQuality];
Check this
NSBundle *bundle = [NSBundle mainBundle];
NSString *moviePath = [bundle pathForResource:titleOfButton ofType:#"mov"];
NSURL *movieURL = [ NSURL fileURLWithPath:moviePath];
MPMoviePlayerController *themovie = [[MPMoviePlayerController alloc]initWithContentURL: movieURL];
[themovie play];
[themovie setCurrentPlaybackRate:2.f];
Related
I'm new to video programming. I'm trying to exercise it but I'm having trouble, which merges two video files to one.
The merge I mean is as follows..
I have first video like this
Second video also like this
I want them to merge like this
I didn't want to use 2 video players because I want to send the merged video file to someone. I searched all day to solve this, but I could't find how to.
I wrote code referencing this link but it shows first video only, not merged.
My Code:
NSURL *firstURL = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:#"video1" ofType:#"mp4"]]
AVURLAsset *firstAsset = [[AVURLAsset alloc]initWithURL:firstURL options:nil];
NSURL *secondURL = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:#"video2" ofType:#"mp4"]];
VURLAsset *secondAsset = [[AVURLAsset alloc]initWithURL:secondURL options:nil];
AVMutableComposition* mixComposition = [AVMutableComposition composition];
AVMutableCompositionTrack *firstTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeVideo
preferredTrackID:kCMPersistentTrackID_Invalid];
[firstTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, firstAsset.duration)
ofTrack:[[firstAsset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0]
atTime:kCMTimeZero error:nil];
AVMutableCompositionTrack *secondTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeVideo
preferredTrackID:kCMPersistentTrackID_Invalid];
[secondTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, secondAsset.duration)
ofTrack:[[secondAsset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0]
atTime:kCMTimeZero error:nil];
[secondTrack setPreferredTransform:CGAffineTransformMakeScale(0.25f,0.25f)];
NSArray *dirPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *docsDir = [dirPaths objectAtIndex:0];
NSString *outputFilePath = [docsDir stringByAppendingPathComponent:[NSString stringWithFormat:#"FinalVideo.mov"]];
NSLog(#"%#", outputFilePath);
NSURL *outputFileUrl = [NSURL fileURLWithPath:outputFilePath];
if ([[NSFileManager defaultManager] fileExistsAtPath:outputFilePath])
[[NSFileManager defaultManager] removeItemAtPath:outputFilePath error:nil];
AVAssetExportSession* assetExport = [[AVAssetExportSession alloc] initWithAsset:mixComposition presetName:AVAssetExportPresetHighestQuality];
assetExport.outputFileType = #"com.apple.quicktime-movie";
assetExport.outputURL = outputFileUrl;
[assetExport exportAsynchronouslyWithCompletionHandler: ^(void ) {
switch (assetExport.status) {
case AVAssetExportSessionStatusFailed:
NSLog(#"AVAssetExportSessionStatusFailed");
break;
case AVAssetExportSessionStatusCompleted:
NSLog(#"AVAssetExportSessionStatusCompleted");
break;
case AVAssetExportSessionStatusWaiting:
NSLog(#"AVAssetExportSessionStatusWaiting");
break;
default:
break;
}
}
];
What am I missing? I don't know how I can approach this to solve the problem.
Appreciate any ideas.
Thanks.
Edit:
i made a new code which referenced a link matt wrote, thanks matt. but when i tried to export it, only first video was exported. not together.. :(
my new code is..
NSURL *originalVideoURL1 = [[NSBundle mainBundle] URLForResource:#"video1" withExtension:#"mov"];
NSURL *originalVideoURL2 = [[NSBundle mainBundle] URLForResource:#"video2" withExtension:#"mov"];
AVURLAsset *firstAsset = [AVURLAsset URLAssetWithURL:originalVideoURL1 options:nil];
AVURLAsset *secondAsset = [AVURLAsset URLAssetWithURL:originalVideoURL2 options:nil];
AVMutableComposition* mixComposition = [[AVMutableComposition alloc] init]; //[AVMutableComposition composition];
NSError *error = nil;
AVMutableCompositionTrack *firstTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeVideo preferredTrackID:kCMPersistentTrackID_Invalid];
[firstTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, firstAsset.duration) ofTrack:[[firstAsset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0] atTime:kCMTimeZero error:&error];
if(error) {
NSLog(#"firstTrack error!!!. %#", error.localizedDescription);
}
AVMutableCompositionTrack *secondTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeVideo preferredTrackID:kCMPersistentTrackID_Invalid];
[secondTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, secondAsset.duration) ofTrack:[[secondAsset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0] atTime:kCMTimeZero error:&error];
if(error) {
NSLog(#"secondTrack error!!!. %#", error.localizedDescription);
}
AVMutableVideoCompositionInstruction *mainInstruction = [AVMutableVideoCompositionInstruction videoCompositionInstruction];
mainInstruction.timeRange = CMTimeRangeMake(kCMTimeZero, firstAsset.duration);
AVMutableVideoCompositionLayerInstruction *firstLayerInstruction = [AVMutableVideoCompositionLayerInstruction videoCompositionLayerInstructionWithAssetTrack:firstTrack];
CGAffineTransform scale = CGAffineTransformMakeScale(0.7, 0.7);
CGAffineTransform move = CGAffineTransformMakeTranslation(230, 230);
[firstLayerInstruction setTransform:CGAffineTransformConcat(scale, move) atTime:kCMTimeZero];
AVMutableVideoCompositionLayerInstruction *secondLayerInstruction = [AVMutableVideoCompositionLayerInstruction videoCompositionLayerInstructionWithAssetTrack:secondTrack];
CGAffineTransform secondScale = CGAffineTransformMakeScale(1.2, 1.5);
CGAffineTransform secondMove = CGAffineTransformMakeTranslation(0, 0);
[secondLayerInstruction setTransform:CGAffineTransformConcat(secondScale, secondMove) atTime:kCMTimeZero];
mainInstruction.layerInstructions = #[firstLayerInstruction, secondLayerInstruction];
AVMutableVideoComposition *mainCompositionInst = [AVMutableVideoComposition videoComposition];
mainCompositionInst.instructions = #[mainInstruction];
mainCompositionInst.frameDuration = CMTimeMake(1, 30);
mainCompositionInst.renderSize = CGSizeMake(640, 480);
AVPlayerItem *newPlayerItem = [AVPlayerItem playerItemWithAsset:mixComposition];
newPlayerItem.videoComposition = mainCompositionInst;
AVPlayer *player = [[AVPlayer alloc] initWithPlayerItem:newPlayerItem];
AVPlayerLayer *playerLayer =[AVPlayerLayer playerLayerWithPlayer:player];
[playerLayer setFrame:self.view.bounds];
[self.view.layer addSublayer:playerLayer];
[player seekToTime:kCMTimeZero];
[player play]; // play is Good!!
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *tempS2 = [documentsDirectory stringByAppendingPathComponent:#"FinalVideo.mov"];
if([[NSFileManager defaultManager] fileExistsAtPath:tempS2])
{
[[NSFileManager defaultManager] removeItemAtPath:tempS2 error:nil];
}
NSURL *url = [[NSURL alloc] initFileURLWithPath: tempS2];
AVAssetExportSession *exportSession = [[AVAssetExportSession alloc]
initWithAsset:mixComposition presetName:AVAssetExportPresetHighestQuality];
exportSession.outputURL=url;
NSLog(#"%#", [exportSession supportedFileTypes]);
exportSession.outputFileType = AVFileTypeQuickTimeMovie;
[exportSession exportAsynchronouslyWithCompletionHandler:^{
if (exportSession.status==AVAssetExportSessionStatusFailed) {
NSLog(#"failed");
}
else {
NSLog(#"AudioLocation : %#",tempS2);
}
}];
how can i export my mixComposition and layerInstruction both?
please give me a little more ideas.
Thanks.
With reference to the code in your second edit, just as you've told the AVPlayerItem about your AVMutableVideoComposition, you need to also tell the AVAssetExportSession too:
exportSession.videoComposition = mainCompositionInst;
// exportAsynchronouslyWithCompletionHandler etc
N.B. make sure you choose the longer of the two track durations when setting your instruction duration:
mainInstruction.timeRange = CMTimeRangeMake(kCMTimeZero, CMTimeMaximum(firstAsset.duration, secondAsset.duration));
AVPlayer doesn't mind if you get this wrong, but AVAssetExportSession does and will return an AVErrorInvalidVideoComposition (-11841) error.
N.B. 2 Your AVPlayer isn't actually going out of scope, but it makes me nervous when I look at it. I'd assign it to a property if I were you.
I have an NSArray containing a list of video NSURL's and I want to merge them together to make one long compilation. The problem is, when I use the code below the videos merge but there is no audio.
- (IBAction)buildVideo {
// 1 - Create AVMutableComposition object. This object will hold your AVMutableCompositionTrack instances.
AVMutableComposition *mixComposition = [[AVMutableComposition alloc] init];
AVMutableCompositionTrack *track = [mixComposition addMutableTrackWithMediaType:AVMediaTypeVideo
preferredTrackID:kCMPersistentTrackID_Invalid];
int i = 0;
for (id object in movieArray) {
AVAsset *asset = [AVAsset assetWithURL:object];
if(i == 0){
[track insertTimeRange:CMTimeRangeMake(kCMTimeZero, asset.duration)
ofTrack:[[asset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0] atTime:kCMTimeZero error:nil];
}else {
[track insertTimeRange:CMTimeRangeMake(kCMTimeZero, asset.duration)
ofTrack:[[asset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0] atTime:[mixComposition duration] error:nil];
}
i = i + 1;
}
// 4 - Get path
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *myPathDocs = [documentsDirectory stringByAppendingPathComponent:
[NSString stringWithFormat:#"mergeVideo-%d.mov",arc4random() % 1000]];
NSURL *url = [NSURL fileURLWithPath:myPathDocs];
// 5 - Create exporter
AVAssetExportSession *exporter = [[AVAssetExportSession alloc] initWithAsset:mixComposition
presetName:AVAssetExportPresetHighestQuality];
exporter.outputURL=url;
exporter.outputFileType = AVFileTypeQuickTimeMovie;
exporter.shouldOptimizeForNetworkUse = YES;
[exporter exportAsynchronouslyWithCompletionHandler:^{
dispatch_async(dispatch_get_main_queue(), ^{
[self exportDidFinish:exporter];
});
}];
}
The reason you're not getting audio is that you're not adding the audio track. You need to create an additional AVMutableCompositionTrack with a type of AVMediaTypeAudio:
AVMutableComposition *mixComposition = [[AVMutableComposition alloc] init];
AVMutableCompositionTrack *videoTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeVideo
preferredTrackID:kCMPersistentTrackID_Invalid];
AVMutableCompositionTrack *audioTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeAudio
preferredTrackID:kCMPersistentTrackID_Invalid];
And insert the time range for the source audio and video tracks into both composition tracks:
CMTime insertTime = kCMTimeZero;
for (id object in movieArray) {
AVAsset *asset = [AVAsset assetWithURL:object];
CMTimeRange timeRange = CMTimeRangeMake(kCMTimeZero, asset.duration);
[videoTrack insertTimeRange:timeRange
ofTrack:[[asset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0]
atTime:insertTime
error:nil];
[audioTrack insertTimeRange:timeRange
ofTrack:[[asset tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0]
atTime:insertTime
error:nil];
insertTime = CMTimeAdd(insertTime,asset.duration);
}
I am trying to stitch a bunch of videos together and then add some music over the video in iOS. The audio is added using AVMutableAudioMix. However when the video is finally exported the audio mix is missing. Here is how the code looks like :
- (void)mergeVideos:(NSArray *)videos{
AVMutableComposition *mixComposition = [[AVMutableComposition alloc] init];
AVMutableCompositionTrack *videoTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeVideo
preferredTrackID:kCMPersistentTrackID_Invalid];
AVMutableCompositionTrack *audioTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeAudio
preferredTrackID:kCMPersistentTrackID_Invalid];
CMTime currentTime = kCMTimeZero;
for (AVAsset *asset in videos) {
// 2 - Video track
[videoTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, asset.duration)
ofTrack:[[asset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0] atTime:currentTime error:nil];
[audioTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, asset.duration)
ofTrack:[[asset tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0] atTime:currentTime error:nil];
currentTime = CMTimeAdd(currentTime, asset.duration);
}
// 4 - Get path
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *myPathDocs = [documentsDirectory stringByAppendingPathComponent:
[NSString stringWithFormat:#"mergeVideo-%d.mp4",arc4random() % 1000]];
NSURL *url = [NSURL fileURLWithPath:myPathDocs];
// 5 - Create exporter
NSArray *compatiblePresets = [AVAssetExportSession exportPresetsCompatibleWithAsset:mixComposition];
NSString *quality = AVAssetExportPresetHighestQuality;
//load the audio
AVMutableAudioMix *audioMix = nil;
NSURL *audioURL = [self loadAudioFile];// gives a url for a .caf file from the bundle
if (audioURL) {
AVURLAsset *audioAsset = [AVURLAsset assetWithURL:audioURL];
AVAssetTrack *aTrack = (AVAssetTrack *)[[audioAsset tracksWithMediaType:AVMediaTypeAudio] firstObject];
AVMutableAudioMixInputParameters *trackMix =
[AVMutableAudioMixInputParameters audioMixInputParametersWithTrack:aTrack];
[trackMix setVolumeRampFromStartVolume:0 toEndVolume:1 timeRange:
CMTimeRangeMake(CMTimeMakeWithSeconds(0, 1), CMTimeMakeWithSeconds(3, 1))];
[trackMix setVolume:1.0 atTime:kCMTimeZero];
AVMutableAudioMix *audioMix = [AVMutableAudioMix audioMix];
audioMix.inputParameters = [NSArray arrayWithObject:trackMix];
}
AVAssetExportSession *exporter = [[AVAssetExportSession alloc] initWithAsset:mixComposition
presetName:quality];
if (audioMix) {
exporter.audioMix = audioMix;
}
exporter.outputURL=url;
exporter.outputFileType = AVFileTypeMPEG4;
exporter.shouldOptimizeForNetworkUse = YES;
[exporter exportAsynchronouslyWithCompletionHandler:^{
dispatch_async(dispatch_get_main_queue(), ^{
[self exportDidFinish:exporter];
});
}];
}
There is no error while executing. Just that the music contained in the .caf file doesnt get mixed to the exported file. Any idea what is going on?
You haven't inserted the audio from the .caf file into any AVMutableCompositionTrack, so the audio mix associated with aTrack is not going to adjust the volume for the .caf file. If you'd like the audio from the .caf file to be included in the video with the associated audio mix, create another AVMutableCompositionTrack to hold the audio from the .caf file:
AVMutableCompositionTrack *audioTrackCAF = [mixComposition addMutableTrackWithMediaType:AVMediaTypeAudio
preferredTrackID:kCMPersistentTrackID_Invalid];
(with the time ranges set to your liking):
[audioTrackCAF insertTimeRange:CMTimeRangeMake(kCMTimeZero, audioAsset.duration)
ofTrack:aTrack atTime:kCMTimeZero error:nil]
Additionally, is helpful to pass an NSError * (instead of nil) to insertTimeRange:ofTrack:atTime:error to make sure you had valid time ranges and your media was inserted.
In my application I need to merge audio and video and then I need to play the audio file in the Mediaplayer. How can I merge the audio and video in IOS. Is there is any source code for this. Please suggest me some ideas
Thanks in advance
Use this
AVURLAsset* audioAsset = [[AVURLAsset alloc]initWithURL:audioUrl options:nil];
AVURLAsset* videoAsset = [[AVURLAsset alloc]initWithURL:videoUrl options:nil];
AVMutableComposition* mixComposition = [AVMutableComposition composition];
AVMutableCompositionTrack *compositionCommentaryTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeAudio
preferredTrackID:kCMPersistentTrackID_Invalid];
[compositionCommentaryTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, audioAsset.duration)
ofTrack:[[audioAsset tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0]
atTime:kCMTimeZero error:nil];
AVMutableCompositionTrack *compositionVideoTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeVideo
preferredTrackID:kCMPersistentTrackID_Invalid];
[compositionVideoTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, videoAsset.duration)
ofTrack:[[videoAsset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0]
atTime:kCMTimeZero error:nil];
AVAssetExportSession* _assetExport = [[AVAssetExportSession alloc] initWithAsset:mixComposition
presetName:AVAssetExportPresetHighestQuality];
NSString* videoName = #"export.mov";
NSString *exportPath = [NSTemporaryDirectory() stringByAppendingPathComponent:videoName];
NSURL *exportUrl = [NSURL fileURLWithPath:exportPath];
if ([[NSFileManager defaultManager] fileExistsAtPath:exportPath])
{
[[NSFileManager defaultManager] removeItemAtPath:exportPath error:nil];
}
_assetExport.outputFileType = #"com.apple.quicktime-movie";
_assetExport.outputURL = exportUrl;
_assetExport.shouldOptimizeForNetworkUse = YES;
[_assetExport exportAsynchronouslyWithCompletionHandler:
^(void ) {
// your completion code here
}
}
];
You can merge videos by creating the Mutable composition.
AVMutableComposition* composition = [[AVMutableComposition alloc]init];
AVURLAsset* video1 = [[AVURLAsset alloc]initWithURL:[NSURL fileURLWithPath:path1]options:nil];
NSArray *pathComponents = [NSArray arrayWithObjects:
[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject],#"MyAudio.m4a",nil];
NSURL *outputFileURL = [NSURL fileURLWithPathComponents:pathComponents];
AVAsset *audioAsset = [AVAsset assetWithURL:outputFileURL];
//Create mutable composition of audio type
AVMutableCompositionTrack *audioTrack = [composition addMutableTrackWithMediaType:AVMediaTypeAudio preferredTrackID:kCMPersistentTrackID_Invalid];
[audioTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero,video1.duration)
ofTrack:[[audioAsset tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0] atTime:kCMTimeZero error:nil];
AVMutableCompositionTrack* composedTrack = [composition addMutableTrackWithMediaType:AVMediaTypeVideo preferredTrackID:kCMPersistentTrackID_Invalid];
[composedTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, video1.duration)
ofTrack:[[video1 tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0]
atTime:kCMTimeZero error:nil];
AVAssetExportSession*exporter = [[AVAssetExportSession alloc]initWithAsset:composition presetName:AVAssetExportPresetHighestQuality];
[exporter exportAsynchronouslyWithCompletionHandler:^{
case AVAssetExportSessionStatusFailed:
NSLog(#"Failed to export video");
break;
case AVAssetExportSessionStatusCancelled:
NSLog(#"export cancelled");
break;
}
For Video merging visit this tutorial. http://iosbucket.blogspot.in/2015/04/mp4-conversion-and-video-merging-in-ios.html
You can also find the sample project for merging videos.
http://www.raywenderlich.com/13418/how-to-play-record-edit-videos-in-ios visit this tutorial for merging audio and video files
It’s a bit late to answer, but it can help someone in the future. repeats audio if video duration is larger than audio.
+ (void)mergeVideoWithAudio:(NSURL *)videoUrl audioUrl:(NSURL *)audioUrl success:(void (^)(NSURL *url))success failure:(void (^)(NSError *error))failure {
AVMutableComposition *mixComposition = [AVMutableComposition new];
NSMutableArray<AVMutableCompositionTrack *> *mutableCompositionVideoTrack = [NSMutableArray new];
NSMutableArray<AVMutableCompositionTrack *> *mutableCompositionAudioTrack = [NSMutableArray new];
AVMutableVideoCompositionInstruction *totalVideoCompositionInstruction = [AVMutableVideoCompositionInstruction new];
AVAsset *aVideoAsset = [AVAsset assetWithURL:videoUrl];
AVAsset *aAudioAsset = [AVAsset assetWithURL:audioUrl];
AVMutableCompositionTrack *videoTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeVideo preferredTrackID:kCMPersistentTrackID_Invalid];
AVMutableCompositionTrack *audioTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeAudio preferredTrackID:kCMPersistentTrackID_Invalid];
if (videoTrack && audioTrack) {
[mutableCompositionVideoTrack addObject:videoTrack];
[mutableCompositionAudioTrack addObject:audioTrack];
AVAssetTrack *aVideoAssetTrack = [aVideoAsset tracksWithMediaType:AVMediaTypeVideo].firstObject;
AVAssetTrack *aAudioAssetTrack = [aAudioAsset tracksWithMediaType:AVMediaTypeAudio].firstObject;
if (aVideoAssetTrack && aAudioAssetTrack) {
[mutableCompositionVideoTrack.firstObject insertTimeRange:CMTimeRangeMake(kCMTimeZero, aVideoAssetTrack.timeRange.duration) ofTrack:aVideoAssetTrack atTime:kCMTimeZero error:nil];
CMTime videoDuration = aVideoAsset.duration;
if (CMTimeCompare(videoDuration, aAudioAsset.duration) == -1) {
[mutableCompositionAudioTrack.firstObject insertTimeRange:CMTimeRangeMake(kCMTimeZero, aVideoAssetTrack.timeRange.duration) ofTrack:aAudioAssetTrack atTime:kCMTimeZero error:nil];
} else if (CMTimeCompare(videoDuration, aAudioAsset.duration) == 1) {
CMTime currentDuration = kCMTimeZero;
while (CMTimeCompare(currentDuration, videoDuration) == -1) {
// repeats audio
CMTime restTime = CMTimeSubtract(videoDuration, currentDuration);
CMTime maxTime = CMTimeMinimum(aAudioAsset.duration, restTime);
[mutableCompositionAudioTrack.firstObject insertTimeRange:CMTimeRangeMake(kCMTimeZero, maxTime) ofTrack:aAudioAssetTrack atTime:currentDuration error:nil];
currentDuration = CMTimeAdd(currentDuration, aAudioAsset.duration);
}
}
videoTrack.preferredTransform = aVideoAssetTrack.preferredTransform;
totalVideoCompositionInstruction.timeRange = CMTimeRangeMake(kCMTimeZero, aVideoAssetTrack.timeRange.duration);
}
}
NSString *outputPath = [NSHomeDirectory() stringByAppendingPathComponent:#"tmp/screenCapture.mp4"];
if ([[NSFileManager defaultManager] fileExistsAtPath:outputPath]) {
[[NSFileManager defaultManager] removeItemAtPath:outputPath error:nil];
}
NSURL *outputURL = [NSURL fileURLWithPath:outputPath];
AVAssetExportSession *exportSession = [[AVAssetExportSession alloc] initWithAsset:mixComposition presetName:AVAssetExportPresetHighestQuality];
exportSession.outputURL = outputURL;
exportSession.outputFileType = AVFileTypeMPEG4;
exportSession.shouldOptimizeForNetworkUse = YES;
// try to export the file and handle the status cases
[exportSession exportAsynchronouslyWithCompletionHandler:^{
switch (exportSession.status) {
case AVAssetExportSessionStatusFailed:
failure(exportSession.error);
break;
case AVAssetExportSessionStatusCancelled:
failure(exportSession.error);
break;
default:
success(outputURL);
break;
}
}];
}
I'm looking for the way that make a audio file like wav, alf or etc.. from a video.
Simply, I want to get only audio from the video.
How can I make it?
I tried to AVAssetExportSession without video, but just only audio,
But it is not work.
PLS help.
Here's my codes
- (void)exportAudioComposition
{
self.filteredSoundURL = [self saveAudioFileRoot];
AVAssetExportSession *exportSession = [[AVAssetExportSession alloc] initWithAsset:self.assetComposition presetName:AVAssetExportPresetPassthrough];
exportSession.outputURL = self.filteredSoundURL;
exportSession.outputFileType = AVFileTypeWAVE;
exportSession.timeRange = CMTimeRangeMake(kCMTimeZero, self.assetComposition.duration);
[exportSession exportAsynchronouslyWithCompletionHandler:^
{
dispatch_async(dispatch_get_main_queue(), ^{
});
}];
[self doAudioProcessWithFilter:SOUN_TURTLE andAssetURL:self.filteredSoundURL];
}
- (void)setupCompositionWithAudio:(NSURL *)audioURL andVideo:(NSURL *)videoURL
{
if (self.assetComposition != nil)
{
self.assetComposition = nil;
}
self.assetComposition = [AVMutableComposition composition];
if (videoURL != nil)
{
AVURLAsset *videoAsset = [[AVURLAsset alloc] initWithURL:videoURL options:nil];
AVMutableCompositionTrack *compVideoTrack = [self.assetComposition addMutableTrackWithMediaType:AVMediaTypeVideo preferredTrackID:kCMPersistentTrackID_Invalid];
AVAssetTrack *videoTrack = [[videoAsset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0];
CMTimeRange videoTimeRange = CMTimeRangeMake(kCMTimeZero, videoAsset.duration);
[compVideoTrack insertTimeRange:videoTimeRange ofTrack:videoTrack atTime:kCMTimeZero error:nil];
}
AVURLAsset *audioAsset = [[AVURLAsset alloc] initWithURL:audioURL options:nil];
AVMutableCompositionTrack *compAudioTrack = [self.assetComposition addMutableTrackWithMediaType:AVMediaTypeAudio preferredTrackID:kCMPersistentTrackID_Invalid];
AVAssetTrack *audioTrack = [[audioAsset tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0];
CMTimeRange audioTimeRange = CMTimeRangeMake(kCMTimeZero, audioAsset.duration);
[compAudioTrack insertTimeRange:audioTimeRange ofTrack:audioTrack atTime:kCMTimeZero error:nil];
}