如何在MPMoviePlayerController中显示字幕 [英] How to display subtitles within MPMoviePlayerController

问题描述

我制作了一个自定义视频播放器，所有按钮都正常工作。我需要知道当视频具有该选项时MPMoviePlayerController显示字幕的代码是什么。我没有找到任何一个例子或者知道这个字幕按钮背后的代码的人。我在哪里可以找到这个？

I built a custom video player, all buttons are working. I need to know what is the code that does the MPMoviePlayerController display subtitles when the video has that option. I did not find anywhere an example or someone who knew what code is behind this subtitle button. Where can I find this?

推荐答案

您必须实现自己的字幕文件解析器。 .srt文件格式非常简单，此处是关于如何解析它的讨论。

You will have to implement your own subtitle file parser. The .srt file format is quite simple, here is a discussion about how to parse it.

更具挑战性的一点是然后同步字幕显示（可能只是 UILabel 放在 MPMoviePlayerController view），包含当前的电影时间。您应该编写一个类，您可以要求 subtitleStringAtTimeInterval ：类似的东西（它将字幕保留在内存中并使字幕提取更快）。然后定期更新字幕（使用 NSTimer 或在每个字幕更新之间短时间间隔休眠的后台线程）。

The more challenging bit is to then synchronize the subtitle display (probably just a UILabel placed on top of the MPMoviePlayerController view), with the current movie time. You should write a class which you can ask for subtitleStringAtTimeInterval: kind of thing (which keeps the subtitles in memory and makes subtitle fetching faster). Then update the subtitles at regular intervals (with NSTimer or a background thread which sleeps for a short time interval between each subtitle update).

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