相册视频MOV转MP4
最新做的一个功能涉及到了视频的录制、压缩及上传。
根据网上诸多大神的经验，终于算是调通了，但也发现了一些问题，所以把我的经验分享一下。
首先，肯定是调用一下系统的相机或相册，
那么导入哪几个库 就不用我说了吧
打开相册获取视频PHAsset
TZImagePickerController 这个库是个好东西
TZImagePickerController *imagePickerVc = [[TZImagePickerController alloc] initWithMaxImagesCount:20 delegate:self];
imagePickerVc.allowPickingVideo = YES;
imagePickerVc.allowPickingImage = NO;
// 设置 模态弹出模式。 iOS 13默认非全屏
imagePicker.modalPresentationStyle = UIModalPresentationFullScreen;
[self presentViewController:imagePickerVc animated:YES completion:nil];
从相册获取到视频PHAsset之后
这时的 (PHAsset*)asset其实就是 AVURLAsset类型
// 选择视频的回调
-(void)imagePickerController:(TZImagePickerController *)picker
didFinishPickingVideo:(UIImage *)coverImage
sourceAssets:(PHAsset *)asset{
NSLog(@"--------- �视频编码 ----------- 开始 ----------");
[MovEncodeToMpegTool convertMovToMp4FromPHAsset:asset
andAVAssetExportPresetQuality:ExportPresetMediumQuality
andMovEncodeToMpegToolResultBlock:^(NSURL *mp4FileUrl, NSData *mp4Data, NSError *error) {
NSLog(@"--------- 视频编码 ----------- 结束 ----------\n{\n %@,\n %ld,\n %@\n}",mp4FileUrl,mp4Data.length,error.localizedDescription);
}];
}
提取MOV文件的AVURLAsset
/// 转码 MOV--MP4
/// @param resourceAsset MOV资源
/// @param exportQuality 预设
/// @param movEncodeToMpegToolResultBlock 转码后的MP4文件链接
+ (void)convertMovToMp4FromPHAsset:(PHAsset*)resourceAsset
andAVAssetExportPresetQuality:(ExportPresetQuality)exportQuality
andMovEncodeToMpegToolResultBlock:(MovEncodeToMpegToolResultBlock)movEncodeToMpegToolResultBlock {
/*
iOS 13 以前
{
assetLocalIdentifier = "A99AA1C3-7D59-4E10-A8D3-BF4FAD7A1BC6/L0/001";
fileSize = 2212572;
filename = "IMG_0049.MOV";
size = "1080,1920";
type = video;
uti = "com.apple.quicktime-movie";
}
iOS 13
{
asset = "9B3F7172-14BB-462E-B003-1CDA5583B038/L0/001";
duration = "20.678";
filename = "IMG_0031.MOV";
size = "1080,1920";
type = video;
uti = "com.apple.quicktime-movie";
}
*/
NSDictionary *videoInfo = [self getVideoInfo:resourceAsset];
NSLog(@"\n%@", videoInfo);
PHVideoRequestOptions *options = [[PHVideoRequestOptions alloc] init];
options.version = PHImageRequestOptionsVersionCurrent;
options.deliveryMode = PHVideoRequestOptionsDeliveryModeAutomatic;
options.networkAccessAllowed = true;
PHImageManager *manager = [PHImageManager defaultManager];
[manager requestAVAssetForVideo:resourceAsset
options:options
resultHandler:^(AVAsset * _Nullable asset, AVAudioMix * _Nullable audioMix, NSDictionary * _Nullable info) {
if ([asset isKindOfClass:[AVURLAsset class]]) {
AVURLAsset *urlAsset = (AVURLAsset *)asset;
[MovEncodeToMpegTool convertMovToMp4FromAVURLAsset:urlAsset
andAVAssetExportPresetQuality:exportQuality
andMovEncodeToMpegToolResultBlock:movEncodeToMpegToolResultBlock];
}else{
NSError *error = [NSError errorWithDomain:@"ConvertMovToMp4ErrorDomain"
code:10008
userInfo:@{NSLocalizedDescriptionKey:@"resource type error"}];
movEncodeToMpegToolResultBlock(nil, nil , error);
}
}];;
}
MOV转码MP4
#pragma mark ### MOV转码MP4
+ (void)convertMovToMp4FromAVURLAsset:(AVURLAsset*)urlAsset
andAVAssetExportPresetQuality:(ExportPresetQuality)exportQuality
andMovEncodeToMpegToolResultBlock:(MovEncodeToMpegToolResultBlock)movEncodeToMpegToolResultBlock {
AVURLAsset *avAsset = [AVURLAsset URLAssetWithURL:urlAsset.URL options:nil];
NSArray *compatiblePresets = [AVAssetExportSession exportPresetsCompatibleWithAsset:avAsset];
// 查询是否有匹配的预设
if ([compatiblePresets containsObject:[self getAVAssetExportPresetQuality:exportQuality]]) {
// 在Documents目录下创建一个名为FileData的文件夹
NSString *path = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)lastObject] stringByAppendingPathComponent:@"Cache/VideoData"];
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);
}
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setLocale:[[NSLocale alloc] initWithLocaleIdentifier:@"zh_CN"]];
[formatter setDateFormat:@"yyyyMMddHHmmss"]; //每次启动后都保存一个新的文件中
NSString *dateStr = [formatter stringFromDate:[NSDate date]];
NSString *resultPath = [path stringByAppendingFormat:@"/%@.mp4",dateStr];
NSLog(@"resultFileName = %@",dateStr);
AVAssetExportSession *exportSession = [[AVAssetExportSession alloc] initWithAsset:avAsset
presetName:[self getAVAssetExportPresetQuality:exportQuality]];
exportSession.outputURL = [NSURL fileURLWithPath:resultPath];
exportSession.outputFileType = AVFileTypeMPEG4;
exportSession.shouldOptimizeForNetworkUse = YES;
[exportSession exportAsynchronouslyWithCompletionHandler:^(void) {
switch (exportSession.status) {
case AVAssetExportSessionStatusUnknown: {
NSError *error = [NSError errorWithDomain:@"ConvertMovToMp4ErrorDomain"
code:10001
userInfo:@{NSLocalizedDescriptionKey:@"AVAssetExportSessionStatusUnknown"}];
movEncodeToMpegToolResultBlock(nil, nil , error);
}
break;
case AVAssetExportSessionStatusWaiting: {
NSError *error = [NSError errorWithDomain:@"ConvertMovToMp4ErrorDomain"
code:10002
userInfo:@{NSLocalizedDescriptionKey:@"AVAssetExportSessionStatusWaiting"}];
movEncodeToMpegToolResultBlock(nil, nil , error);
}
break;
case AVAssetExportSessionStatusExporting: {
NSError *error = [NSError errorWithDomain:@"ConvertMovToMp4ErrorDomain"
code:10003
userInfo:@{NSLocalizedDescriptionKey:@"AVAssetExportSessionStatusExporting"}];
movEncodeToMpegToolResultBlock(nil, nil , error);
}
break;
case AVAssetExportSessionStatusCompleted: {
NSData *mp4Data = [NSData dataWithContentsOfURL:exportSession.outputURL];
movEncodeToMpegToolResultBlock(exportSession.outputURL, mp4Data , nil);
}
break;
case AVAssetExportSessionStatusFailed: {
NSError *error = [NSError errorWithDomain:@"ConvertMovToMp4ErrorDomain"
code:10005
userInfo:@{NSLocalizedDescriptionKey:@"AVAssetExportSessionStatusFailed"}];
movEncodeToMpegToolResultBlock(nil, nil , error);
}
break;
case AVAssetExportSessionStatusCancelled: {
NSError *error = [NSError errorWithDomain:@"ConvertMovToMp4ErrorDomain"
code:10006
userInfo:@{NSLocalizedDescriptionKey:@"AVAssetExportSessionStatusCancelled"}];
movEncodeToMpegToolResultBlock(nil, nil , error);
}
break;
}
}];
}
else{
NSError *error = [NSError errorWithDomain:@"ConvertMovToMp4ErrorDomain"
code:10007
userInfo:@{NSLocalizedDescriptionKey:@"AVAssetExportSessionStatusNoPreset"}];
movEncodeToMpegToolResultBlock(nil, nil , error);
}
}
自定义转码预设枚举类型，用以映射系统预设
/*
AVAssetExportPresetLowQuality 低质量 可以通过移动网络分享
AVAssetExportPresetMediumQuality 中等质量 可以通过WIFI网络分享
AVAssetExportPresetHighestQuality 高等质量
AVAssetExportPreset640x480
AVAssetExportPreset960x540
AVAssetExportPreset1280x720 720pHD
AVAssetExportPreset1920x1080 1080pHD
AVAssetExportPreset3840x2160
*/
+ (NSString *const )getAVAssetExportPresetQuality:(ExportPresetQuality)exportPreset {
switch (exportPreset) {
case ExportPresetLowQuality:
return AVAssetExportPresetLowQuality;
case ExportPresetMediumQuality:
return AVAssetExportPresetMediumQuality;
case ExportPresetHighestQuality:
return AVAssetExportPresetHighestQuality;
case ExportPreset640x480:
return AVAssetExportPreset640x480;
case ExportPreset960x540:
return AVAssetExportPreset960x540;
case ExportPreset1280x720:
return AVAssetExportPreset1280x720;
case ExportPreset1920x1080:
return AVAssetExportPreset1920x1080;
case ExportPreset3840x2160:
return AVAssetExportPreset3840x2160;
}
}
请注意
转码方法最好不要在模拟器上执行，哪怕你模拟器相册导入了视频也不要，因为
[AVAssetExportSession exportPresetsCompatibleWithAsset:avAsset];
有概率 无 反 应 ！！！！
这句话是其他帖子没写过的，可能他们没有在模拟器执行过，模拟器是可以导入视频和图片的，直接拖进去就OK。
建议真机运行！
建议真机运行！
建议真机运行！
2020年儿童节更新。
目前本文Demo已经迁移至《TZImagePickerControllerDemo》
