topic Re: convert an RGB888 image to JPEG image in Embedded Software and Tools Clinic

convert an RGB888 image to JPEG image

farid_mabrouk — Tue, 01 Dec 2020 00:52:55 GMT

Hi Guys!

I have generated framebuffer in RGB888 and I would like to convert to to a JPEG format. I am trying to use these APIs, bur so far no success:

// Step 2: Initialize the JPEG compression object
jpeg_create_compress(&cinfo);

//jpeg_start_decompress(&cinfo);
jpeg_start_compress (&cinfo,true);

Can anyone give me more details about what other APIs to use and it would be great if there is a demo example.

Thank you all in advance.

Re: convert an RGB888 image to JPEG image

farid_mabrouk — Thu, 03 Dec 2020 01:42:06 GMT

I hope someone would answer my question. I am not sure why I am not getting a reply for none of the questions I submitted recently.

I am trying to compress an RGB888 image using Libjepg library, but for some reasons my code hangs as soon as it call this function: jpeg_set_defaults(&cinfo); I was following the example code used in this APP Note: https://www.nxp.com/docs/en/application-note/AN12110.pdf

In between I am using iMX RT1176A.

Re: convert an RGB888 image to JPEG image

zhouqi — Thu, 14 Jan 2021 09:04:50 GMT

Hi farid_mabrouk

I have the problem with how to get a RGB888 capture from CSI.

Would you give me so