MPMoviePlayerController从流视频获取缩略图? [英] MPMoviePlayerController Getting Thumbnail from Streaming Video?

问题描述

我正在尝试从流式视频中获取一个视频缩略图，当将其触摸到按钮时.我都用过；

I'm trying to get a Video Thumbnail from Streaming Video when touched to a Button. I've used both;

- (UIImage *)thumbnailImageAtTime:(NSTimeInterval)playbackTime timeOption:(MPMovieTimeOption)option
- (void)requestThumbnailImagesAtTimes:(NSArray *)playbackTimes timeOption:(MPMovieTimeOption)option

但是每次返回的图像为空，或者在下面出现错误；

But everytime, returned image is null, or getting error below;

错误域= AVFoundationErrorDomain代码= -11838操作已停止" UserInfo = 0x7ac5560 {NSLocalizedFailureReason =该介质不支持该操作.NSUnderlyingError = 0x7a82ea0操作无法完成.(OSStatus错误-12435.) "，NSLocalizedDescription =操作已停止}

Error Domain=AVFoundationErrorDomain Code=-11838 "Operation Stopped" UserInfo=0x7ac5560 {NSLocalizedFailureReason=The operation is not supported for this media., NSUnderlyingError=0x7a82ea0 "The operation couldn’t be completed. (OSStatus error -12435.)", NSLocalizedDescription=Operation Stopped}

是否有从流视频中获取缩略图的运气? 谢谢.

is there any luck to get thumbnail from streaming video? Thanks.

推荐答案

您必须先下载整个视频，然后才能获得支持API的请求...因为它表示API不支持从远程媒体获取支持

You will have to download the whole video before you can get a thumb with API requests...as it says the API does not support getting thumbs from remote media

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