Make movie file with picture Array and song file, using AVAsset

I finally found how make movie with a picture array and an audio file. So if you want do the same thing I put my code here (be careful to memory):

• First make a movie file with your picture array use zoul's post here:

  -(void) writeImagesToMovieAtPath:(NSString *) path withSize:(CGSize) size{  NSString *documentsDirectoryPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];  NSArray *dirContents = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:documentsDirectoryPath error:nil];  for (NSString *tString in dirContents)   {    if ([tString isEqualToString:@"essai.mp4"])     {        [[NSFileManager defaultManager]removeItemAtPath:[NSString stringWithFormat:@"%@/%@",documentsDirectoryPath,tString] error:nil];    }  }  NSLog(@"Write Started");  NSError *error = nil;  AVAssetWriter *videoWriter = [[AVAssetWriter alloc] initWithURL:                              [NSURL fileURLWithPath:path] fileType:AVFileTypeMPEG4                                                          error:&error];      NSParameterAssert(videoWriter);  NSDictionary *videoSettings = [NSDictionary dictionaryWithObjectsAndKeys:                               AVVideoCodecH264, AVVideoCodecKey,                               [NSNumber numberWithInt:size.width], AVVideoWidthKey,                               [NSNumber numberWithInt:size.height], AVVideoHeightKey,                               nil];  AVAssetWriterInput* videoWriterInput = [[AVAssetWriterInput                                         assetWriterInputWithMediaType:AVMediaTypeVideo                                         outputSettings:videoSettings] retain];  AVAssetWriterInputPixelBufferAdaptor *adaptor = [AVAssetWriterInputPixelBufferAdaptor                                                 assetWriterInputPixelBufferAdaptorWithAssetWriterInput:videoWriterInput                                                 sourcePixelBufferAttributes:nil];  NSParameterAssert(videoWriterInput);  NSParameterAssert([videoWriter canAddInput:videoWriterInput]);  videoWriterInput.expectsMediaDataInRealTime = YES;  [videoWriter addInput:videoWriterInput];  //Start a session:  [videoWriter startWriting];  [videoWriter startSessionAtSourceTime:kCMTimeZero];  //Video encoding  CVPixelBufferRef buffer = NULL;  //convert uiimage to CGImage.  int frameCount = 0;  for(int i = 0; i<[m_PictArray count]; i++)  {    buffer = [self pixelBufferFromCGImage:[[m_PictArray objectAtIndex:i] CGImage] andSize:size];    BOOL append_ok = NO;    int j = 0;    while (!append_ok && j < 30)     {        if (adaptor.assetWriterInput.readyForMoreMediaData)         {            printf("appending %d attemp %d\n", frameCount, j);            CMTime frameTime = CMTimeMake(frameCount,(int32_t) 10);            append_ok = [adaptor appendPixelBuffer:buffer withPresentationTime:frameTime];            CVPixelBufferPoolRef bufferPool = adaptor.pixelBufferPool;            NSParameterAssert(bufferPool != NULL);            [NSThread sleepForTimeInterval:0.05];        }         else         {            printf("adaptor not ready %d, %d\n", frameCount, j);            [NSThread sleepForTimeInterval:0.1];        }        j++;    }    if (!append_ok)     {        printf("error appending image %d times %d\n", frameCount, j);    }    frameCount++;    CVBufferRelease(buffer);  }  [videoWriterInput markAsFinished];  [videoWriter finishWriting];  [videoWriterInput release];  [videoWriter release];  [m_PictArray removeAllObjects];  NSLog(@"Write Ended"); }

• After that you must put together movie file and audio file. To do this follow my code:

  -(void)CompileFilesToMakeMovie{  AVMutableComposition* mixComposition = [AVMutableComposition composition];  NSString* audio_inputFileName = @"deformed.caf";  NSString* audio_inputFilePath = [Utilities documentsPath:audio_inputFileName];  NSURL*    audio_inputFileUrl = [NSURL fileURLWithPath:audio_inputFilePath];  NSString* video_inputFileName = @"essai.mp4";  NSString* video_inputFilePath = [Utilities documentsPath:video_inputFileName];  NSURL*    video_inputFileUrl = [NSURL fileURLWithPath:video_inputFilePath];  NSString* outputFileName = @"outputFile.mov";  NSString* outputFilePath = [Utilities documentsPath:outputFileName];  NSURL*    outputFileUrl = [NSURL fileURLWithPath:outputFilePath];  if ([[NSFileManager defaultManager] fileExistsAtPath:outputFilePath])     [[NSFileManager defaultManager] removeItemAtPath:outputFilePath error:nil];  CMTime nextClipStartTime = kCMTimeZero;  AVURLAsset* videoAsset = [[AVURLAsset alloc]initWithURL:video_inputFileUrl options:nil];  CMTimeRange video_timeRange = CMTimeRangeMake(kCMTimeZero,videoAsset.duration);  AVMutableCompositionTrack *a_compositionVideoTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeVideo preferredTrackID:kCMPersistentTrackID_Invalid];  [a_compositionVideoTrack insertTimeRange:video_timeRange ofTrack:[[videoAsset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0] atTime:nextClipStartTime error:nil];  //nextClipStartTime = CMTimeAdd(nextClipStartTime, a_timeRange.duration);  AVURLAsset* audioAsset = [[AVURLAsset alloc]initWithURL:audio_inputFileUrl options:nil];  CMTimeRange audio_timeRange = CMTimeRangeMake(kCMTimeZero, audioAsset.duration);  AVMutableCompositionTrack *b_compositionAudioTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeAudio preferredTrackID:kCMPersistentTrackID_Invalid];  [b_compositionAudioTrack insertTimeRange:audio_timeRange ofTrack:[[audioAsset tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0] atTime:nextClipStartTime error:nil];  AVAssetExportSession* _assetExport = [[AVAssetExportSession alloc] initWithAsset:mixComposition presetName:AVAssetExportPresetHighestQuality];     _assetExport.outputFileType = @"com.apple.quicktime-movie";  _assetExport.outputURL = outputFileUrl;  [_assetExport exportAsynchronouslyWithCompletionHandler: ^(void ) {     [self saveVideoToAlbum:outputFilePath];  }        ];  }

Sorry if there are some leak, I'm doing the optimization of memory.

The AVChannelLayoutKey should point to an NSData instance containing an AudioChannelLayout.

Yours points to an NSNumber.