[Cin] The best strategy to render yuv (mpeg, limited range) from yuvj (jpeg, full range)?

[Tarantas]

> > Since you're already fighting color banding, the good thing is to
> > 32-bit colors in Settings -> Format -> Color model: RGB(A)-FLOAT.
> > Note this could slow down your playback and rendering.  

Guys, hold on a second. Unfortunately I just discovered the RGB color
model is required for this recipe. The YUV model causes big color
shifts for an unknown reason. Moreover, I found JPEG mode completely
incompatible with YUV color mode, even without any filters or hacks,
and I lost the track of what's going on already.

Must be just a bug because nobody tested JPEG mode in years.

Could you please advise me any tool to detect shifts in color channels
in order to compose a proper bug report? All I could do now is just to
screenshot the difference between the compose window and render results.