Is it just me, or build crop_rec_4k_mlv_snd_isogain_1x3_presets_2019Jan10.EOSM202 is creating corrupted frames in 1x3 binning mode?
And this is probably stupid question, but instead of 3x3,1x3,3x1, would it be possible to use binning or line skipping 2x2...? Probably using some array operations, like readout whole sensor and then decrease it in size...not quite sure if limit is on processing side, or write speed size (or if it even possible to edit raw frame before saving it...but given how many "impossible" things have been already done...).