jo-mpeg-in-c/

[utterances-bot]

Jo_MPEG converted to C

Single-header MPEG-1 Video library ported to C

https://blog.frost.kiwi/jo-mpeg-in-c/

[r-lyeh]

Clarification for the 1.02 fix: colors were washed out because R/G components were swapped.

Original code:

float r = c[0], g = c[1], b = c[2];
Y[i] = (0.59f*r + 0.30f*g + 0.11f*b) * (219.f/255) + 16;

Proposed fix, per https://en.wikipedia.org/wiki/YUV formulas:

float r = c[0], g = c[1], b = c[2];
Y[i] = (0.59f*g + 0.30f*r + 0.11f*b) * (219.f/255) + 16;

Not sure what happened after.

[FrostKiwi]

@r-lyeh Thx for clarifying!
Using Big Buck Bunny, scenes with very few reds, I missed the color mismatch. Now with your correction in place, it really does looks identical now in terms of color. I added an addendum, included the changes in the code and inserted a sample with lots of red in the scene, where the color mismatch is very apparent.