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我想基于TPlayer用QT开发一个播放器,目前,在UI线程播放正常。但是因为播放器销毁是个耗时任务,所以需要把播放器放到新线程中去运行。放到新线程之后,只有声音,没有图像。新线程要在UI线程渲染图像,需要向UI线程发送图像,这个视频帧和字幕如何获取呢?或者说有其他好办法吗?