GPUImageMovie播放控件 [英] GPUImageMovie playback controls

问题描述

我正在尝试控制GPUImageMovie的播放。
我想要存档的是从一个帧跳到另一个帧（seekToTime后退和前进，滑动控制）而不是播放视频，但我不明白它是否为此用途而设计的组件。

I'm trying to control the playback of a GPUImageMovie. What I would like to archive is jump from a frame to another (seekToTime back and forward, swipe controlled) rather then play the video, but I don't understand if the component it's designed for this use.

GPUImageMovie - > filters - > GPUImageView

GPUImageMovie -> filters -> GPUImageView

我试过在playerItem上使用AVPlayer，但显然它是null。

I've tried to use an AVPlayer on playerItem, but apparetly it's null.

推荐答案

您可以使用 AVPlayer 获取控制视频：create GPUImageMovie 使用 AVPlayerItem ，这样你就可以使用 AVPlayer 来控制你的视频方法。

You can use AVPlayer for control video: create GPUImageMovie by using AVPlayerItem, so you can control your video by using AVPlayer methods.

示例：

NSURL *mediaURL = ...
AVPlayer *mainPlayer = [[AVPlayer alloc] init];
AVPlayerItem *playerItem = [[AVPlayerItem alloc] initWithURL:mediaUrl];
[mainPlayer replaceCurrentItemWithPlayerItem:playerItem];

GPUImageMovie *currentMovieFile = [[GPUImageMovie alloc] initWithPlayerItem:playerItem];
[currentMovieFile addTarget:...];
[currentMovieFile startProcessing];

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