将视频保存到iPhone库时出现问题。 我有一组UIImages和两个按钮，“convertToVideo”和“saveToiPhoneLib”
-(IBAction) convertToVideo
{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = ([paths count] > 0) ? [paths objectAtIndex:0] : nil;
NSString *savedVideoPath = [documentsDirectory stringByAppendingPathComponent:@"videoOutput"];
printf(" \n\n\n-Video file == %s--\n\n\n",[savedVideoPath UTF8String]);
[self writeImageAsMovie:imageArray toPath:savedVideoPath size:self.view.frame.size duration:3];
}
here i'm passing the imageArray and savedVideoPath to the function below
-(void)writeImageAsMovie:(NSArray *)array toPath:(NSString*)path size:(CGSize)size duration:(int)duration
{
NSError *error = nil;
AVAssetWriter *videoWriter = [[AVAssetWriter alloc] initWithURL:
[NSURL fileURLWithPath:path] fileType:AVFileTypeQuickTimeMovie
error:&error];
NSParameterAssert(videoWriter);
NSDictionary *videoSettings = [NSDictionary dictionaryWithObjectsAndKeys:
AVVideoCodecH264, AVVideoCodecKey,
[NSNumber numberWithInt:size.width], AVVideoWidthKey,
[NSNumber numberWithInt:size.height], AVVideoHeightKey,
nil];
AVAssetWriterInput* writerInput = [[AVAssetWriterInput
assetWriterInputWithMediaType:AVMediaTypeVideo
outputSettings:videoSettings] retain];
// NSDictionary *bufferAttributes = [NSDictionary dictionaryWithObjectsAndKeys: [NSNumber numberWithInt:kCVPixelFormatType_32ARGB], kCVPixelBufferPixelFormatTypeKey, nil];
AVAssetWriterInputPixelBufferAdaptor *adaptor = [AVAssetWriterInputPixelBufferAdaptor
assetWriterInputPixelBufferAdaptorWithAssetWriterInput:writerInput
sourcePixelBufferAttributes:nil];
NSParameterAssert(writerInput);
NSParameterAssert([videoWriter canAddInput:writerInput]);
[videoWriter addInput:writerInput];
//Start a session:
[videoWriter startWriting];
[videoWriter startSessionAtSourceTime:kCMTimeZero];
CVPixelBufferRef buffer = NULL;
//convert uiimage to CGImage.
buffer = [self pixelBufferFromCGImage:[[array objectAtIndex:0] CGImage]];
[adaptor appendPixelBuffer:buffer withPresentationTime:kCMTimeZero];
//Write samples:
......
//Finish the session:
[writerInput markAsFinished];
[videoWriter finishWriting];
}
generate a CVPixelBufferRef here
- (CVPixelBufferRef) pixelBufferFromCGImage: (CGImageRef) image
{
NSDictionary *options = [NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithBool:YES], kCVPixelBufferCGImageCompatibilityKey,
[NSNumber numberWithBool:YES], kCVPixelBufferCGBitmapContextCompatibilityKey,
nil];
CVPixelBufferRef pxbuffer = NULL;
CVReturn status = CVPixelBufferCreate(kCFAllocatorDefault, self.view.frame.size.width,
self.view.frame.size.height, kCVPixelFormatType_32ARGB, (CFDictionaryRef) options,
&pxbuffer);
NSParameterAssert(status == kCVReturnSuccess && pxbuffer != NULL);
CVPixelBufferLockBaseAddress(pxbuffer, 0);
void *pxdata = CVPixelBufferGetBaseAddress(pxbuffer);
NSParameterAssert(pxdata != NULL);
CGColorSpaceRef rgbColorSpace = CGColorSpaceCreateDeviceRGB();
CGContextRef context = CGBitmapContextCreate(pxdata, self.view.frame.size.width,
self.view.frame.size.height, 8, 4*self.view.frame.size.width, rgbColorSpace,
kCGImageAlphaNoneSkipFirst);
NSParameterAssert(context);
CGContextConcatCTM(context, CGAffineTransformMakeRotation(0));
CGContextDrawImage(context, CGRectMake(0, 0, CGImageGetWidth(image),
CGImageGetHeight(image)), image);
CGColorSpaceRelease(rgbColorSpace);
CGContextRelease(context);
CVPixelBufferUnlockBaseAddress(pxbuffer, 0);
return pxbuffer;
}
保存到iPhone库
-(IBAction) saveToiPhoneLib
{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
NSString *basePath = ([paths count] > 0) ? [paths objectAtIndex:0] : nil;
NSString *getImagePath = [basePath stringByAppendingPathComponent:@"videoOutput"];
printf(" \n\n\n-Video file == %s--\n\n\n",[getImagePath UTF8String]);
UISaveVideoAtPathToSavedPhotosAlbum ( getImagePath,self, @selector(video:didFinishSavingWithError: contextInfo:), nil);
}
- (void) video: (NSString *) videoPath didFinishSavingWithError: (NSError *) error contextInfo: (void *) contextInfo {
NSLog(@"Finished saving video with error: %@", error);
}
但在保存时收到错误消息： -
已完成保存视频但出错：错误域= ALAssetsLibraryErrorDomain代码= -3302“无效数据”UserInfo = 0x1d59f0 {NSLocalizedFailureReason =写入此资产时出现问题，因为数据无效且无法查看或播放。，NSLocalizedRecoverySuggestion =尝试使用不同的数据，NSLocalizedDescription =无效数据}
请告诉我我的错误。提前谢谢答案 0 :(得分：5)
-(void)convertimagetoVideo
{
///////////// setup OR function def if we move this to a separate function ////////////
// this should be moved to its own function, that can take an imageArray, videoOutputPath, etc...
NSError *error = nil;
// set up file manager, and file videoOutputPath, remove "test_output.mp4" if it exists...
//NSString *videoOutputPath = @"/Users/someuser/Desktop/test_output.mp4";
NSFileManager *fileMgr = [NSFileManager defaultManager];
NSString *documentsDirectory = [NSHomeDirectory()
stringByAppendingPathComponent:@"Documents"];
NSString *videoOutputPath = [documentsDirectory stringByAppendingPathComponent:@"test_output.mp4"];
//NSLog(@"-->videoOutputPath= %@", videoOutputPath);
// get rid of existing mp4 if exists...
if ([fileMgr removeItemAtPath:videoOutputPath error:&error] != YES)
NSLog(@"Unable to delete file: %@", [error localizedDescription]);
CGSize imageSize = CGSizeMake(400, 200);
// NSUInteger fps = 30;
NSUInteger fps = 30;
//NSMutableArray *imageArray;
//imageArray = [[NSMutableArray alloc] initWithObjects:@"download.jpeg", @"download2.jpeg", nil];
NSMutableArray *imageArray;
NSArray* imagePaths = [[NSBundle mainBundle] pathsForResourcesOfType:@"png" inDirectory:nil];
imageArray = [[NSMutableArray alloc] initWithCapacity:imagePaths.count];
NSLog(@"-->imageArray.count= %i", imageArray.count);
for (NSString* path in imagePaths)
{
[imageArray addObject:[UIImage imageWithContentsOfFile:path]];
//NSLog(@"-->image path= %@", path);
}
////////////// end setup ///////////////////////////////////
NSLog(@"Start building video from defined frames.");
AVAssetWriter *videoWriter = [[AVAssetWriter alloc] initWithURL:
[NSURL fileURLWithPath:videoOutputPath] fileType:AVFileTypeQuickTimeMovie
error:&error];
NSParameterAssert(videoWriter);
NSDictionary *videoSettings = [NSDictionary dictionaryWithObjectsAndKeys:
AVVideoCodecH264, AVVideoCodecKey,
[NSNumber numberWithInt:imageSize.width], AVVideoWidthKey,
[NSNumber numberWithInt:imageSize.height], AVVideoHeightKey,
nil];
AVAssetWriterInput* videoWriterInput = [AVAssetWriterInput
assetWriterInputWithMediaType:AVMediaTypeVideo
outputSettings:videoSettings];
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];
CVPixelBufferRef buffer = NULL;
//convert uiimage to CGImage.
int frameCount = 0;
double numberOfSecondsPerFrame = 6;
double frameDuration = fps * numberOfSecondsPerFrame;
//for(VideoFrame * frm in imageArray)
NSLog(@"**************************************************");
for(UIImage * img in imageArray)
{
//UIImage * img = frm._imageFrame;
buffer = [self pixelBufferFromCGImage:[img CGImage]];
BOOL append_ok = NO;
int j = 0;
while (!append_ok && j < 30) {
if (adaptor.assetWriterInput.readyForMoreMediaData) {
//print out status:
NSLog(@"Processing video frame (%d,%d)",frameCount,[imageArray count]);
//CMTime frameTime = CMTimeMake((int64_t), (int32_t)2);
CMTime frameTime = CMTimeMake(frameCount*frameDuration,(int32_t) fps);
NSLog(@"seconds = %f, %u, %d", CMTimeGetSeconds(frameTime),fps,j);
append_ok = [adaptor appendPixelBuffer:buffer withPresentationTime:frameTime];
if(!append_ok){
NSError *error = videoWriter.error;
if(error!=nil) {
NSLog(@"Unresolved error %@,%@.", error, [error userInfo]);
}
}
}
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, with error.", frameCount, j);
}
frameCount++;
}
NSLog(@"**************************************************");
//Finish the session:
[videoWriterInput markAsFinished];
[videoWriter finishWriting];
NSLog(@"Write Ended");
}
-(void)CompileFilestomakeVideo
{
// set up file manager, and file videoOutputPath, remove "test_output.mp4" if it exists...
//NSString *videoOutputPath = @"/Users/someuser/Desktop/test_output.mp4";
NSString *documentsDirectory = [NSHomeDirectory()
stringByAppendingPathComponent:@"Documents"];
NSString *videoOutputPath = [documentsDirectory stringByAppendingPathComponent:@"test_output.mp4"];
//NSLog(@"-->videoOutputPath= %@", videoOutputPath);
// get rid of existing mp4 if exists...
AVMutableComposition* mixComposition = [AVMutableComposition composition];
NSString *bundleDirectory = [[NSBundle mainBundle] bundlePath];
// audio input file...
NSString *audio_inputFilePath = [bundleDirectory stringByAppendingPathComponent:@"30secs.mp3"];
NSURL *audio_inputFileUrl = [NSURL fileURLWithPath:audio_inputFilePath];
// this is the video file that was just written above, full path to file is in --> videoOutputPath
NSURL *video_inputFileUrl = [NSURL fileURLWithPath:videoOutputPath];
// create the final video output file as MOV file - may need to be MP4, but this works so far...
NSString *outputFilePath = [documentsDirectory stringByAppendingPathComponent:@"final_video.mp4"];
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.outputFileType = @"public.mpeg-4";
//NSLog(@"support file types= %@", [_assetExport supportedFileTypes]);
_assetExport.outputURL = outputFileUrl;
[_assetExport exportAsynchronouslyWithCompletionHandler:
^(void ) {
[self saveVideoToAlbum:outputFilePath];
}
];
///// THAT IS IT DONE... the final video file will be written here...
NSLog(@"DONE.....outputFilePath--->%@", outputFilePath);
// the final video file will be located somewhere like here:
// /Users/caferrara/Library/Application Support/iPhone Simulator/6.0/Applications/D4B12FEE-E09C-4B12-B772-7F1BD6011BE1/Documents/outputFile.mov
////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////
}
- (void) saveVideoToAlbum:(NSString*)path {
NSLog(@"saveVideoToAlbum");
if(UIVideoAtPathIsCompatibleWithSavedPhotosAlbum(path)){
UISaveVideoAtPathToSavedPhotosAlbum (path, self, @selector(video:didFinishSavingWithError: contextInfo:), nil);
}
}
-(void) video:(NSString *)videoPath didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo {
if(error)
NSLog(@"error: %@", error);
else
NSLog(@" OK");
}
////////////////////////
- (CVPixelBufferRef) pixelBufferFromCGImage: (CGImageRef) image {
CGSize size = CGSizeMake(400, 200);
NSDictionary *options = [NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithBool:YES], kCVPixelBufferCGImageCompatibilityKey,
[NSNumber numberWithBool:YES], kCVPixelBufferCGBitmapContextCompatibilityKey,
nil];
CVPixelBufferRef pxbuffer = NULL;
CVReturn status = CVPixelBufferCreate(kCFAllocatorDefault,
size.width,
size.height,
kCVPixelFormatType_32ARGB,
(__bridge CFDictionaryRef) options,
&pxbuffer);
if (status != kCVReturnSuccess){
NSLog(@"Failed to create pixel buffer");
}
CVPixelBufferLockBaseAddress(pxbuffer, 0);
void *pxdata = CVPixelBufferGetBaseAddress(pxbuffer);
CGColorSpaceRef rgbColorSpace = CGColorSpaceCreateDeviceRGB();
CGContextRef context = CGBitmapContextCreate(pxdata, size.width,
size.height, 8, 4*size.width, rgbColorSpace,
kCGImageAlphaPremultipliedFirst);
//kCGImageAlphaNoneSkipFirst);
CGContextConcatCTM(context, CGAffineTransformMakeRotation(0));
CGContextDrawImage(context, CGRectMake(0, 0, CGImageGetWidth(image),
CGImageGetHeight(image)), image);
CGColorSpaceRelease(rgbColorSpace);
CGContextRelease(context);
CVPixelBufferUnlockBaseAddress(pxbuffer, 0);
return pxbuffer;
}
答案 1 :(得分：1)
使用下面的代码
- (void)creatingVideo {
//get full path of video file from documents directory
NSError *error = nil;
NSFileManager *fileMgr = [NSFileManager defaultManager];
NSString *documentsDirectory = [self applicationDocumentsDirectory];
NSString *videoOutputPath = [documentsDirectory stringByAppendingPathComponent:@"test_output.mov"];
// get rid of existing mp4 if exists...
if ([fileMgr removeItemAtPath:videoOutputPath error:&error] != YES)
NSLog(@"Unable to delete file it does not exits on path");
//size of the video frame
CGSize imageSize = CGSizeMake(640,480);
//CGSize imageSize = CGSizeMake(1280, 720);
//frame per second
NSUInteger fps = 30;
NSLog(@"Start building video from defined frames.");
//AvAsset library to create video of images
AVAssetWriter *videoWriter = [[AVAssetWriter alloc] initWithURL:[NSURL fileURLWithPath:videoOutputPath] fileType:AVFileTypeQuickTimeMovie error:&error];
NSParameterAssert(videoWriter);
NSDictionary *videoSettings = [NSDictionary dictionaryWithObjectsAndKeys: AVVideoCodecH264, AVVideoCodecKey, [NSNumber numberWithInt:imageSize.width], AVVideoWidthKey,[NSNumber numberWithInt:imageSize.height], AVVideoHeightKey,nil];
AVAssetWriterInput* videoWriterInput = [[AVAssetWriterInput assetWriterInputWithMediaType:AVMediaTypeVideo outputSettings:videoSettings] retain];
NSDictionary *bufferAttributes = [NSDictionary dictionaryWithObjectsAndKeys:[NSNumber numberWithInt:kCVPixelFormatType_32ARGB], kCVPixelBufferPixelFormatTypeKey, nil];
AVAssetWriterInputPixelBufferAdaptor *adaptor = [AVAssetWriterInputPixelBufferAdaptor assetWriterInputPixelBufferAdaptorWithAssetWriterInput:videoWriterInput sourcePixelBufferAttributes:bufferAttributes];
NSParameterAssert(videoWriterInput);
NSParameterAssert([videoWriter canAddInput:videoWriterInput]);
videoWriterInput.expectsMediaDataInRealTime = YES;
[videoWriter addInput:videoWriterInput];
//Start a session:
[videoWriter startWriting];
[videoWriter startSessionAtSourceTime:kCMTimeZero];
CVPixelBufferRef buffer = NULL;
//frameCount.
int frameCount = 0;
double frameDuration;
double numberOfSecondsPerFrame = appDelegate.delaySecond;
NSLog(@"**************************video creation started********************************");
for (int i = 0; i<[self.arrImageDataDict count]; i++) {
{
@autoreleasepool{
UIImage *img1 = nil;
img1 = [self getImageForVideoCreation:i];
buffer = [self pixelBufferFromCGImage: [img1 CGImage]];
if (buffer == NULL) {
NSLog(@"Pixel buffer not created");
} else {
BOOL append_ok = NO;
int j = 0;
while (!append_ok && j < 20) {
if (adaptor.assetWriterInput.readyForMoreMediaData) {
//print out status:
NSLog(@"Processing video frame (%d,%d) delay %f",frameCount,[self.arrImageDataDict count],numberOfSecondsPerFrame);
frameDuration = fps * numberOfSecondsPerFrame;
CMTime frameTime = CMTimeMake(frameCount*frameDuration,(int32_t) fps);
append_ok = [adaptor appendPixelBuffer:buffer withPresentationTime:frameTime];
if(!append_ok){
NSError *error = videoWriter.error;
if(error!=nil) {
NSLog(@"Unresolved error %@,%@.", error, [error userInfo]);
}
}
} 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, with error.", frameCount, j);
}
frameCount++;
CVPixelBufferRelease(buffer);
buffer = nil;
}
}
}
}
//Finish the session:
[videoWriterInput markAsFinished];
//get the iOS version of the device
float version = [[[UIDevice currentDevice] systemVersion] floatValue];
if (version < 6.0)
{
[videoWriter finishWriting];
//NSLog (@"finished writing iOS version:%f",version);
} else {
[videoWriter finishWritingWithCompletionHandler:^(){
//NSLog (@"finished writing iOS version:%f",version);
}];
}
CVPixelBufferPoolRelease(adaptor.pixelBufferPool);
[videoWriter release];
[videoWriterInput release];
//OK now add an audio file to move file
AVMutableComposition* mixComposition = [AVMutableComposition composition];
//Get the saved audio song path to merge it in video
NSURL *audio_inputFileUrl ;
NSString *filePath = [self applicationDocumentsDirectory];
NSString *outputFilePath1 = [filePath stringByAppendingPathComponent:@"mySong.m4a"];
audio_inputFileUrl = [[NSURL alloc]initFileURLWithPath:outputFilePath1];
// this is the video file that was just written above
NSURL *video_inputFileUrl = [[NSURL alloc]initFileURLWithPath:videoOutputPath];;
[NSThread sleepForTimeInterval:2.0];
// create the final video output file as MOV file - may need to be MP4, but this works so far...
NSString *outputFilePath = [documentsDirectory stringByAppendingPathComponent:@"Slideshow_video.mov"];
NSURL *outputFileUrl = [[NSURL alloc]initFileURLWithPath:outputFilePath];
if ([[NSFileManager defaultManager] fileExistsAtPath:outputFilePath])
[[NSFileManager defaultManager] removeItemAtPath:outputFilePath error:nil];
//AVURLAsset get video without audio
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:kCMTimeZero error:nil];
[videoAsset release];
[NSThread sleepForTimeInterval:3.0];
//If audio song merged
if (![self.appDelegate.musicFilePath isEqualToString:@"Not set"])
{
//*************************make sure all exception is off***********************
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];
if (![audioAsset tracksWithMediaType:AVMediaTypeAudio].count == 0) {
[b_compositionAudioTrack insertTimeRange:audio_timeRange ofTrack:[[audioAsset tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0] atTime:kCMTimeZero error:nil];
}
[audioAsset release];
}
// Cleanup, in both success and fail cases
[audio_inputFileUrl release];
[video_inputFileUrl release];
[NSThread sleepForTimeInterval:0.1];
//AVAssetExportSession to export the video
AVAssetExportSession* _assetExport = [[AVAssetExportSession alloc] initWithAsset:mixComposition presetName:AVAssetExportPresetHighestQuality];
_assetExport.outputFileType = AVFileTypeQuickTimeMovie;
_assetExport.outputURL = outputFileUrl;
[_assetExport exportAsynchronouslyWithCompletionHandler:^(void){
switch (_assetExport.status) {
case AVAssetExportSessionStatusCompleted:
#if !TARGET_IPHONE_SIMULATOR
[self writeVideoToPhotoLibrary:outputFileUrl];
#endif
[self RemoveSlideshowImagesInTemp];
[self removeAudioFileFromDocumentsdirectory:outputFilePath1];
[self removeAudioFileFromDocumentsdirectory:videoOutputPath];
[outputFileUrl release];
[_assetExport release];
//NSLog(@"AVAssetExportSessionStatusCompleted");
dispatch_async(dispatch_get_main_queue(), ^{
if (alrtCreatingVideo && alrtCreatingVideo.visible) {
[alrtCreatingVideo dismissWithClickedButtonIndex:alrtCreatingVideo.firstOtherButtonIndex animated:YES];
[databaseObj isVideoCreated:appDelegate.pro_id];
[self performSelector:@selector(successAlertView) withObject:nil afterDelay:0.0];
}
});
break;
case AVAssetExportSessionStatusFailed:
NSLog(@"Failed:%@",_assetExport.error);
break;
case AVAssetExportSessionStatusCancelled:
NSLog(@"Canceled:%@",_assetExport.error);
break;
default:
break;
}
}];
}
//writeVideoToPhotoLibrary
- (void)writeVideoToPhotoLibrary:(NSURL *)url
{
ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
[library writeVideoAtPathToSavedPhotosAlbum:url completionBlock:^(NSURL *assetURL, NSError *error){
if (error) {
NSLog(@"Video could not be saved");
}
}];
[library release];
}
答案 2 :(得分：0)
这只是太多的代码来检查错误。确保您可以启动导出会话，您真正获得了图像的像素缓冲区，编写器已准备好接收更多数据，缓冲区无误地附加，导出会话成功完成以及输出影片文件存在并实际包含一些数据。只有这样，您才可以尝试将其保存到系统相册中。检查所有可用的错误信息，以便您知道第一次破坏的位置。 （另一件事是你只是从网上获取代码并将它们粘贴在一起，这只是而不是将用于AV编程。）
答案 3 :(得分：0)
是的，我有同样的错误：
Error Domain=AVFoundationErrorDomain Code=-11823 "Cannot Save" UserInfo=0x193ce0 {NSLocalizedRecoverySuggestion=Try saving again., NSUnderlyingError=0x179e40 "The operation couldn’t be completed. (OSStatus error -12412.)", NSLocalizedDescription=Cannot Save}
但是只有在模拟器上，当我在设备上运行时，保存到照片库才能正常工作。