Rgb0 to Yuv420p example

[felicemarra]

If I have a rgba (or rgb0) frame 1280x720 and I want to convert to yuv420p I tried to use RGBAToI420 function but I don't understand what I have to put in the stride parameters.

libyuv.RGBAToI420( curFrame.data, 1280, planY, 1280, planU, 1280 / 2, planV, 1280 / 2, 1280, 720 );

this is the result

[rezonant]

Yeah adding some examples is a good idea, you have to dig in quite a bit to chromium's source tree to understand.

I'll look into doing that, in the mean time you might find this code from node-webrtc useful-- they have abstracted out the logic that produces the appropriate parameters, but it was very helpful to me to understand what needs to be passed:

https://github.com/node-webrtc/node-webrtc/blob/develop/src/methods/i420_helpers.cc