The matrix coefficients field in the file is Identity, indicating this is RGB data, but the pixel layout field is "half width and half height". We don't support subsampling with RGB data, so we hit this https://searchfox.org/mozilla-central/rev/fa55b33a4b56f392bc5a0c7616e0dfe055112cb5/gfx/ycbcr/yuv_convert.cpp#144 which makes ConvertYCbCrToRGB32 fail. Differential Revision: https://phabricator.services.mozilla.com/D217906
