How to prepare a RGB master for Blu-ray encoding?

[Maxiuca]

I've been asked by a friend to encode a short animation (CG) he directed (independent and low-budget production) and then author it to Blu-ray.
He brought me a hard drive with the master which is simply TIFF image sequence (48-bit color - 16-bit per channel). I've converted them to a sequence of PNG file (24 color of course) so that it can be read by AviSynth.

At this step I got a little confused. I know that this short film was entirely made in sRGB colorspace (monitors have been calibrated to sRGB, rendered in sRGB, then the whole post-production was made in Nuke that had also colorspace set to sRGB and in the end the TIFFs have been saved in sRGB).
I have to convert the colorspace to ITU-R BT.709 and scale the luma to TV range.

I'm wondering if in this case would a simple "ConvertToYUY2(matrix="Rec709")" be enough to make the video ready for Blu-ray? Seems little to simple