Re: [android-developers] how to play a video on an OpenGL texture

Did you get any good result?

Could you share your code? Thanks in advance.

 

I am looking at it too. It seems there are a bunch of spaces to modify in order to let video output to an OpenGL texture.

 

Just a little wondering why Google doesn't publish an example, since it seems many people ask the same question from my searching result.

On Wednesday, December 5, 2012 9:58:04 AM UTC-6, bob wrote:

Yes, you're right.

I had to change the bind calls to this:

GLES20.glBindTexture(GL_TEXTURE_EXTERNAL_OES, mTextureID);

Thanks.

On Tuesday, December 4, 2012 6:06:18 PM UTC-6, RichardC wrote:

I don't think your bind texture call is correct see bold below:

"The texture object uses the GL_TEXTURE_EXTERNAL_OES texture target, which is defined by the GL_OES_EGL_image_external OpenGL ES extension. This limits how the texture may be used. Each time the texture is bound it must be bound to the GL_TEXTURE_EXTERNAL_OES target rather than the GL_TEXTURE_2D target. Additionally, any OpenGL ES 2.0 shader that samples from the texture must declare its use of this extension using, for example, an "#extension GL_OES_EGL_image_external : require" directive. Such shaders must also access the texture using the samplerExternalOES GLSL sampler type."

From:
http://developer.android.com/reference/android/graphics/SurfaceTexture.html

On Tuesday, December 4, 2012 3:13:06 PM UTC, bob wrote:

I fiddled with a bunch of approaches for binding.  The current code looks like this:

int[] textures = new int[1];

GLES20.glGenTextures(1, textures, 0);

mTextureID = textures[0];

GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, mTextureID);

GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MIN_FILTER,

                GLES20.GL_NEAREST);

GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D,

                GLES20.GL_TEXTURE_MAG_FILTER,

                GLES20.GL_LINEAR);

GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_WRAP_S,

                GLES20.GL_REPEAT);

GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_WRAP_T,

                GLES20.GL_REPEAT);

Statics.st = new SurfaceTexture(textures[0]);

On Tuesday, December 4, 2012 3:08:16 AM UTC-6, Fabien R wrote:

On 03/12/2012 17:50, bob wrote:
>  
>
> I actually tried calling it in onDrawFrame, and that yields a slightly
> different error:
>
>
> 12-03 10:47:23.282: E/SurfaceTexture(2753): [unnamed-2753-0]
> updateTexImage: error binding external texture image 0x9046042f (slot 5):
> 0x502
>  
How did you bind your texture ?
-
Fabien

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