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POerror in the output texture yuv422 in ios
 

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  1. POerror in the output texture yuv422 in ios
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    <p>here's a screenshot screen with the ipad <a href="http://joxi.ru/7J9NUdg5CbCJWOM8-i0" rel="nofollow">http://joxi.ru/7J9NUdg5CbCJWOM8-i0</a> sein <a href="http://joxi.ru/SspPUdg5CbBrLdFutis" rel="nofollow">http://joxi.ru/SspPUdg5CbBrLdFutis</a></p> <p>error:</p> <p>1) picture (<a href="http://joxi.ru/CYRRUdg5CbDiKIByZLo" rel="nofollow">http://joxi.ru/CYRRUdg5CbDiKIByZLo</a>)</p> <p>2) size, not full screen</p> <p>My shader:</p> <pre><code>NSString *const yuvFragmentShaderString = SHADER_STRING ( varying highp vec2 texCoordVarying; uniform sampler2D s_texture_y; uniform sampler2D s_texture_u; uniform sampler2D s_texture_v; void main() { highp float y = texture2D(s_texture_y, texCoordVarying).r; highp float u = texture2D(s_texture_u, texCoordVarying).r - 0.5; highp float v = texture2D(s_texture_v, texCoordVarying).r - 0.5; highp float r = y + 1.402 * v; highp float g = y - 0.344 * u - 0.714 * v; highp float b = y + 1.772 * u; gl_FragColor = vec4(r,g,b,1.0); } ); </code></pre> <p>I can not understand what the problem is in the shader, or somewhere else? I can add code</p> <p>Update</p> <p>Create texture</p> <pre><code>const NSUInteger widths[3] = { width, width / 2, width / 2 }; const NSUInteger heights[3] = { height, height, height}; for (int i = 0; i &lt; 3; ++i) { glBindTexture(GL_TEXTURE_2D, texture[i]); glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE, widths[i], heights[i], 0, GL_LUMINANCE, GL_UNSIGNED_BYTE, //pixels[i]); bytes-&gt;data[i]); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); } </code></pre> <p>activite texture</p> <pre><code>glActiveTexture(GL_TEXTURE0); glBindTexture(GL_TEXTURE_2D, texture[0]); glUniform1i(uniforms[UNIFORM_TEXTURE], 0); glActiveTexture(GL_TEXTURE1); glBindTexture(GL_TEXTURE_2D, texture[1]); glUniform1i(uniforms[UNIFORM_TEXTURE1], 1); glActiveTexture(GL_TEXTURE2); glBindTexture(GL_TEXTURE_2D, texture[2]); glUniform1i(uniforms[UNIFORM_TEXTURE2], 2); </code></pre> <p>draw texture</p> <pre><code>GLfloat mvpMatrix[16]; [self prepareRender]; [EDMatrixTools applyIdentity:mvpMatrix]; glUniformMatrix4fv(uniforms[UNIFORM_MVP_MATRIX], 1, GL_FALSE, mvpMatrix); glVertexAttribPointer(ATTRIB_VERTEX, 2, GL_FLOAT, 0, 0, squareVertices); glEnableVertexAttribArray(ATTRIB_VERTEX); glVertexAttribPointer(ATTRIB_TEXTURE_COORD, 2, GL_FLOAT, 0, 0, squareTexCoords); glEnableVertexAttribArray(ATTRIB_TEXTURE_COORD); [self drawArraysFirst:0 Count:4]; [self presentFramebuffer]; </code></pre>
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    1. USuser1881371
    1. USuser1881371
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    1. COIt might help if you describe what it is you're trying to do, and what you've tried already. Your code is doing all sorts of whacky things. I would start by simply rendering the texture completely as is without the transformations, and then you can step forward and add the y/u/v bits.
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      1. POerror in the output texture yuv422 in ios
      1. USmobob
    2. COI draw a texture that comes from the stream. comes to yuv, when I convert to rgb using swscale, everything works. I want to optimize, do the conversion in shader
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      1. POerror in the output texture yuv422 in ios
      1. USuser1881371
    3. COIt looks like the issue is in how you're uploading the texture, not in the color conversion. It looks like you have the wrong width for your data.
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      1. POerror in the output texture yuv422 in ios
      1. USuser1118321
 

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