Decoded YUV shows green edge when rendered with OpenGL - c++

Question

Any idea, why decoded YUV -> RGB(shader conversion) has that extra green edge on the right side?
Almost any 1080X1920 video seems to have this issue.
A screen recording of the issue is uploaded here https://imgur.com/a/JtUZq4h
Once I manually scale up the texture width, I can see it fills up to the viewport, but it would be nice if I could fix the actual cause. Is it some padding that's part of YUV colorspace? What else could it be?
My model is -1 to 1, filling the entire width
The texture coordinates are also 0 to 1 ratio
float vertices[] = {
-1.0, 1.0f, 0.0f, 0.0, // top left
1.0f, 1.0f, 1.0, 0.0, // top right
-1.0f, -1.0f, 0.0f, 1.0f, // bottom left
1.0f, -1.0f, 1.0f, 1.0f // bottom right
};
Fragment Shader
#version 330 core
in vec2 TexCoord;
out vec4 FragColor;
precision highp float;
uniform sampler2D textureY;
uniform sampler2D textureU;
uniform sampler2D textureV;
uniform float alpha;
uniform vec2 texScale;
void main()
{
float y = texture(textureY, TexCoord / texScale).r;
float u = texture(textureU, TexCoord / texScale).r - 0.5;
float v = texture(textureV, TexCoord / texScale).r - 0.5;
vec3 rgb;
//yuv - 709
rgb.r = clamp(y + (1.402 * v), 0, 255);
rgb.g = clamp(y - (0.2126 * 1.5748 / 0.7152) * u - (0.0722 * 1.8556 / 0.7152) * v, 0, 255);
rgb.b = clamp(y + (1.8556 * u), 0,255);
FragColor = vec4(rgb, 1.0);
}
Texture Class
class VideoTexture {
public:
VideoTexture(Decoder *dec) : decoder(dec) {
glGenTextures(1, &texture1);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glBindTexture(GL_TEXTURE_2D, texture1);
glTexImage2D(GL_TEXTURE_2D, 0, internalFormat, decoder->frameQueue.first().linesize[0], decoder->frameQueue.first().height, 0, format, GL_UNSIGNED_BYTE, 0);
glGenerateMipmap(GL_TEXTURE_2D);
glGenTextures(1, &texture2);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glBindTexture(GL_TEXTURE_2D, texture2);
glTexImage2D(GL_TEXTURE_2D, 0, internalFormat, decoder->frameQueue.first().linesize[1], decoder->frameQueue.first().height / 2, 0, format, GL_UNSIGNED_BYTE, 0);
glGenerateMipmap(GL_TEXTURE_2D);
glGenTextures(1, &texture3);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glBindTexture(GL_TEXTURE_2D, texture3);
glTexImage2D(GL_TEXTURE_2D, 0, internalFormat, decoder->frameQueue.first().linesize[2], decoder->frameQueue.first().height / 2, 0, format, GL_UNSIGNED_BYTE, 0);
glGenerateMipmap(GL_TEXTURE_2D);
}
void Render(Shader *shader, Gui *gui) {
if (decoder->frameQueue.isEmpty()) {
return;
}
glActiveTexture(GL_TEXTURE0);
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, decoder->frameQueue.first().linesize[0], decoder->frameQueue.first().height, format, GL_UNSIGNED_BYTE, decoder->frameQueue.at(currentFrame).data[0]);
glBindTexture(GL_TEXTURE_2D, texture1);
shader->setInt("textureY", 0);
glActiveTexture(GL_TEXTURE1);
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, decoder->frameQueue.first().linesize[1], decoder->frameQueue.first().height / 2, format, GL_UNSIGNED_BYTE, decoder->frameQueue.at(currentFrame).data[1]);
glBindTexture(GL_TEXTURE_2D, texture2);
shader->setInt("textureU", 1);
glActiveTexture(GL_TEXTURE2);
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, decoder->frameQueue.first().linesize[2], decoder->frameQueue.first().height / 2, format, GL_UNSIGNED_BYTE, decoder->frameQueue.at(currentFrame).data[2]);
glBindTexture(GL_TEXTURE_2D, texture3);
shader->setInt("textureV", 2);
}
~VideoTexture() {
printf("\nVideo texture destructor");
glDeleteTextures(1, &texture1);
glDeleteTextures(1, &texture2);
glDeleteTextures(1, &texture3);
}
private:
GLuint texture1;
GLuint texture2;
GLuint texture3;
GLint internalFormat = GL_RG8;
GLint format = GL_RED;
int currentFrame = 0;
Decoder *decoder;
}