Upload YUV texture to OpenGL

yuv.cpp

// Get texture location in fragment shader
GLint locTexY = glGetUniformLocation(program, "textureY");
GLint locTexVU = glGetUniformLocation(program, "textureVU");

// Upload YUV data to texture buffer
GLuint textureID[2];

glGenTextures(1, &textureID[0]);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, textureID[0]);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RED, width, height, 0, GL_RED, GL_UNSIGNED_BYTE, &yuvBuffer[0]);
glBindTexture(0);

glGenTextures(1, &textureID[1]);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, textureID[1]);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RG, width, height/2, 0, GL_RG, GL_UNSIGNED_BYTE, &yuvBuffer[width*height]);
glBindTexture(0);

glUseProgram(program);
glUniform1i(locTexY, 0); // corresponds to GL_TEXTURE0
glUniform1i(locTexVU, 1); // corresponds to GL_TEXTURE1

GL_RG means put u as R and v as G ? And got uv value in shader code as following:
yuv.y = texture(textureVU, texCoord).g - 0.5;
yuv.z = texture(textureVU, texCoord).r - 0.5;

@xueshenan it depends on what is your input format. If it YUV nv12 then r is u and g is v, nv21 is reversed order

thank you, I have solve the problem.