如何保存表面纹理位图 [英] How to save SurfaceTexture as bitmap

问题描述

当我去codeA视频表面我要救我想为位图/ JPEG文件的帧。我不想在屏幕上绘制，只是想保存的表面纹理作为图像文件中的内容。

When I decode a video to a surface I want to save the frames i want as bitmap/jpeg files. I don't want to draw on the screen and just want to save the content of the SurfaceTexture as an image file.

推荐答案

您已经呈现质感。

如果它是一个正常的质感，而你正在使用GLES 2或更高版本，你可以将其连接到一个FBO，然后直接从中读出。 A 表面纹理是由一个的外部纹理，并可能是该GL驱动程序不支持全套的操作上的格式，所以你不能这样做。你需要使它和读取结果。

If it were a normal texture, and you were using GLES 2 or later, you could attach it to an FBO and read directly from that. A SurfaceTexture is backed by an "external texture", and might be in a format that the GL driver doesn't support a full set of operations on, so you can't do that. You need to render it, and read the result.

FWIW，你去拯救框架可以有显著影响性能的方式。一个完整的例子演示了使用 MediaExtractor ，媒体codeC ， glReadPixels（） 和PNG文件的创建，现在上bigflake（ ExtractMpegFramesTest ）

FWIW, the way you go about saving the frame can have a significant performance impact. A full example demonstrating the use of MediaExtractor, MediaCodec, glReadPixels(), and PNG file creation is now up on bigflake (ExtractMpegFramesTest).

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