CODEWITHSUNDEEP
c++opencvpixelgifmat
Zhiqiang Li
Zhiqiang Li

Reputation: 411

encode opencv mat to gif using giflib

I'm trying to encode some Mats into a gif file using giflib, but I can't get it to work.

Here's how I convert the opencv mat's data into gif pixel:

cv::resize(input_mat, input_mat, cv::Size (160, 160));
cv::Mat mrgba(160, gif_size, CV_8UC4, cv::Scalar(0,0,0,0));
cv::cvtColor(input_mat, mrgba, CV_BGR2RGBA);
Byte * buffer = malloc( 160 * 160 *sizeof(Byte));
memcpy(buffer, mrgba.data, 160 * 160 *sizeof(Byte));

Then encode buffer into gif file. The other part of my code is right because I can use it to encode pixel buffers I got from OpenGL by using glReadPixel. I think maybe there's something wrong with OpenCV mat's data structure.

Let me attach a picture to show you what I got now:

enter image description here

Upvotes: 0

Views: 1508

Answers (1)

Zhiqiang Li
Zhiqiang Li

Reputation: 411

As @berak said, I was not copying enough bytes. the current size should be 

memcpy(buffer, mrgba.data, 160 * 160 *sizeof(Byte));

Upvotes: 1

Related Questions