android - 使用纹理 View 保存视频

Question

我正在尝试使用 OEPNGL 和 android 来制作视频效果

我正在下载源代码项目:
https://www.virag.si/2014/03/playing-video-with-opengl-on-android/

在此代码中应用视频效果。但是如何将视频存储在 sdcard 中的纹理 View 中

播放视频:代码

  private void startPlaying()
{
    renderer = new VideoTextureRenderer(this, surface.getSurfaceTexture(), surfaceWidth, surfaceHeight);
    player = new MediaPlayer();

try
    {
        AssetFileDescriptor afd = getAssets().openFd("big_buck_bunny.mp4");
        player.setDataSource(afd.getFileDescriptor(), afd.getStartOffset(), afd.getLength());
        player.setSurface(new Surface(renderer.getVideoTexture()));
        player.setLooping(true);
        player.prepare();
        renderer.setVideoSize(player.getVideoWidth(), player.getVideoHeight());
        player.start();
    }
    catch (IOException e)
    {
        throw new RuntimeException("Could not open input video!");
    }

}

应用效果代码:

私有(private)静态最终字符串 fragment ShaderCode =

"#extension GL_OES_EGL_image_external : require\n" +
"precision mediump float;" +
"varying highp vec2 v_TexCoordinate;" +
"uniform samplerExternalOES texture;" +
"uniform sampler2D chrominanceTexture;" +
"void main () {" +
"mediump vec3 yuv;" +
"lowp vec3 rgb;" +
"yuv.x = texture2D(texture, v_TexCoordinate).r;" +
"yuv.yz = texture2D(chrominanceTexture, v_TexCoordinate).rg - vec2(0.7154, 0.0721);" +
"rgb = mat3(1,1,1,0,0.2125, 0.7154, 0.0721,-.38059,0) * yuv;"+
"gl_FragColor = vec4(rgb, 1);"+

"}";

谢谢。

Answer 1

您必须使用一些外部库将其保存为视频。
例如使用 ffmpeg。
查看此链接:ffmpegDocumentation
有一个明确的文档。