How to convert png to yuv?

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I would like to use function of libpng to decode png image and decode it into YUV444 data format, but I do not know which function to call, or how to write this custom callback function?
I find some code to use libpng to decode png image, but I do not know how to set the png data format (such as RGB888, YUV444, etc.).
I hope to be able to provide code based on libpng, very grateful.With C ++ / C

What I have tried:

I find some code to use libpng to decode png image, but I do not know how to set the png data format (such as RGB888, YUV444, etc.).

Posted 11-Jul-17 21:39pm

DingTingTing

Updated 11-Jul-17 22:13pm

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Richard MacCutchan 12-Jul-17 3:50am

You need to read the documentation.

DingTingTing 12-Jul-17 9:52am

what kind of documentation?

Richard MacCutchan 12-Jul-17 9:57am

Are you kidding?

DingTingTing 12-Jul-17 10:01am

No,I'm not kidding.

Richard MacCutchan 12-Jul-17 10:16am

So what documentation do you think will help you to learn how to use the library that you want to use?

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KarstenK · Accepted Answer · 2017-07-11T21:56:00

With libpng should be easy as decribed Reading an image. From that image you must extract the pixels to converting eacha pixel into YUV is easy by applying the formulas to every pixel of the image. Read the YUV article in the wikipedia for the different formulas. Pay attention to the differnet YUV file formats when writing.

How to convert png to yuv?

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How to convert png to yuv?

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