标签：nil 转码 NSLog iOS callBack MP4 asset && path
本地已转码时，直接上传；本地无转码时，先转码再上传
/// 视频处理通过本地沙盒文件路径判断此视频文件是否已经转码
/// @param asset 视频资源
/// @param callBack 回调
- (void)dealWithVidioAsset:(PHAsset *)asset
callBack:(void (^)(NSString *))callBack
{
/// 转码操作
PHImageManager *manager = [PHImageManager defaultManager];
[manager requestAVAssetForVideo:asset
options:nil
resultHandler:^(AVAsset * _Nullable aVsset, AVAudioMix * _Nullable audioMix, NSDictionary * _Nullable info) {
///判断此视频是否已经转码
NSString *path = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)lastObject] stringByAppendingFormat:@"/VideoCacheData/%@.mp4",[((AVURLAsset*)aVsset).URL.path MD5String]];
NSFileManager *fileManager = [NSFileManager defaultManager];
BOOL isDirExist = [fileManager fileExistsAtPath:path];
if (isDirExist) {
// 已经转码成功 直接上传
[self uploadMpa4WithUrl:[NSURL URLWithString:path] callBack:^(NSString *str) {
if (callBack) {
callBack(str);
}
}];
return;
}
[self convertMovToMp4FromAVURLAsset:(AVURLAsset*)aVsset andCompeleteHandler:^(NSURL *fileUrl) {
if (!fileUrl) {
[HUDManager hideHUDView];
[self.view showMessageWithText:@"上传错误请重试！"];
self.navigationItem.rightBarButtonItem.enabled = YES;
}else
{
[self uploadMpa4WithUrl:fileUrl callBack:^(NSString *str) {
if (callBack) {
callBack(str);
}
}];
}
}];
}];
}
转码MP4
- (void)convertMovToMp4FromAVURLAsset:(AVURLAsset*)urlAsset andCompeleteHandler:(void(^)(NSURL *fileUrl))fileUrlHandler{
AVURLAsset *avAsset = [AVURLAsset URLAssetWithURL:urlAsset.URL options:nil];
NSArray *compatiblePresets = [AVAssetExportSession exportPresetsCompatibleWithAsset:avAsset];
if ([compatiblePresets containsObject:AVAssetExportPresetLowQuality]) {
// 在Documents目录下创建一个名为FileData的文件夹
NSString *path = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)lastObject] stringByAppendingPathComponent:@"VideoCacheData"];
NSFileManager *fileManager = [NSFileManager defaultManager];
BOOL isDir = FALSE;
BOOL isDirExist = [fileManager fileExistsAtPath:path isDirectory:&isDir];
if(!(isDirExist && isDir)) {
BOOL bCreateDir = [fileManager createDirectoryAtPath:path withIntermediateDirectories:YES attributes:nil error:nil];
if(!bCreateDir){
NSLog(@"创建文件夹失败！%@",path);
}
NSLog(@"创建文件夹成功，文件路径%@",path);
}
/// 文件名为本地相册路径的Md5
NSString *resultPath = [path stringByAppendingFormat:@"/%@.mp4",[urlAsset.URL.path MD5String]];
NSLog(@"file path:%@",resultPath);
NSLog(@"resultPath = %@",resultPath);
AVAssetExportSession *exportSession = [[AVAssetExportSession alloc] initWithAsset:avAsset
presetName:AVAssetExportPresetMediumQuality];
exportSession.outputURL = [NSURL fileURLWithPath:resultPath];
exportSession.outputFileType = AVFileTypeMPEG4;
exportSession.shouldOptimizeForNetworkUse = YES;
exportSession.videoComposition = [self getVideoComposition:avAsset]; //修正某些播放器不识别视频Rotation的问题
[exportSession exportAsynchronouslyWithCompletionHandler:^(void)
{
dispatch_async(dispatch_get_main_queue(), ^{
switch (exportSession.status) {
case AVAssetExportSessionStatusUnknown:
NSLog(@"AVAssetExportSessionStatusUnknown");
fileUrlHandler(nil);
break;
case AVAssetExportSessionStatusWaiting:
NSLog(@"AVAssetExportSessionStatusWaiting");
fileUrlHandler(nil);
break;
case AVAssetExportSessionStatusExporting:
NSLog(@"AVAssetExportSessionStatusExporting");
fileUrlHandler(nil);
break;
case AVAssetExportSessionStatusCompleted:
NSLog(@"AVAssetExportSessionStatusCompleted");
fileUrlHandler(exportSession.outputURL);
break;
case AVAssetExportSessionStatusFailed:
NSLog(@"AVAssetExportSessionStatusFailed");
fileUrlHandler(nil);
break;
case AVAssetExportSessionStatusCancelled:
NSLog(@"AVAssetExportSessionStatusCancelled");
fileUrlHandler(nil);
break;
}
});
}];
}
}
修正视频位置
/// 修正位置信息
- (AVMutableVideoComposition *)getVideoComposition:(AVAsset *)asset
{
AVAssetTrack *videoTrack = [[asset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0];
AVMutableComposition *composition = [AVMutableComposition composition];
AVMutableVideoComposition *videoComposition = [AVMutableVideoComposition videoComposition];
CGSize videoSize = videoTrack.naturalSize;
BOOL isPortrait_ = [self isVideoPortrait:asset];
if(isPortrait_) {
videoSize = CGSizeMake(videoSize.height, videoSize.width);
}
composition.naturalSize = videoSize;
videoComposition.renderSize = videoSize;
videoComposition.frameDuration = CMTimeMakeWithSeconds( 1 / videoTrack.nominalFrameRate, 600);
AVMutableCompositionTrack *compositionVideoTrack;
compositionVideoTrack = [composition addMutableTrackWithMediaType:AVMediaTypeVideo preferredTrackID:kCMPersistentTrackID_Invalid];
[compositionVideoTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, asset.duration) ofTrack:videoTrack atTime:kCMTimeZero error:nil];
AVMutableVideoCompositionLayerInstruction *layerInst;
layerInst = [AVMutableVideoCompositionLayerInstruction videoCompositionLayerInstructionWithAssetTrack:videoTrack];
[layerInst setTransform:videoTrack.preferredTransform atTime:kCMTimeZero];
AVMutableVideoCompositionInstruction *inst = [AVMutableVideoCompositionInstruction videoCompositionInstruction];
inst.timeRange = CMTimeRangeMake(kCMTimeZero, asset.duration);
inst.layerInstructions = [NSArray arrayWithObject:layerInst];
videoComposition.instructions = [NSArray arrayWithObject:inst];
return videoComposition;
}
- (BOOL) isVideoPortrait:(AVAsset *)asset
{
BOOL isPortrait = NO;
NSArray *tracks = [asset tracksWithMediaType:AVMediaTypeVideo];
if([tracks count] > 0) {
AVAssetTrack *videoTrack = [tracks objectAtIndex:0];
CGAffineTransform t = videoTrack.preferredTransform;
// Portrait
if(t.a == 0 && t.b == 1.0 && t.c == -1.0 && t.d == 0)
{
isPortrait = YES;
}
// PortraitUpsideDown
if(t.a == 0 && t.b == -1.0 && t.c == 1.0 && t.d == 0) {
isPortrait = YES;
}
// LandscapeRight
if(t.a == 1.0 && t.b == 0 && t.c == 0 && t.d == 1.0)
{
isPortrait = NO;
}
// LandscapeLeft
if(t.a == -1.0 && t.b == 0 && t.c == 0 && t.d == -1.0)
{
isPortrait = NO;
}
}
return isPortrait;
}
标签：nil,转码,NSLog,iOS,callBack,MP4,asset,&&,path 来源： https://www.cnblogs.com/huangzs/p/15234902.html
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