Help decoding YUV420

[tgmichel]

Hey! I'm trying to decode a raspberry pi captured bitstream which happens to be in YUV420 format.

After decoding the Y, U and V components lengths are:

y_with_stride().len(): 2142720
u_with_stride().len(): 535680
v_with_stride(): 535680

YUV420 byte array should have a 1920 * 1080 * 3 / 2 = 3110400 size, but with the decoded components I'd end up with a 2142720 + 535680 + 535680 = 3214080 length array, and at that point I'm lost at how to build a valid decoded byte array.

Could you please help me understand where the discrepancy is coming from? Thank you.

Note that if I write_rgb instead of trying to manually compose the YUV420 byte array, I manage to send the output as BGR3.

[ralfbiedert]

Maybe I misunderstand, but isn't that the stride you're looking at? What does strides_yuv() say?

[tgmichel]

Maybe I misunderstand, but isn't that the stride you're looking at? What does strides_yuv() say?

Yeah my bad, this is my first time working with video encoders. strides_yuv() outs (1984, 992, 992)