Film Convert Pro - Grain Test 0-200% Prores Proxy Version
Testing the grain settings and results on H.264 compression to Vimeo & Youtube.
See MP4 H.264 25 Mbps upload to vimeo here. vimeo.com/73031258 it still has grain showing but to less effect. Thats at 25 Mbps but at 10Mbps its a real mess.
Usually when using film grain for online (web) version delivery it looks pretty good on the rendered h.264 version but that film grain will get lost on the next generation H.264 re-encoding loss on Vimeo or Youtube and your footage will look very poor. Even pushing the H.264 encoder unto 25Mbps does little to hold the grain.
But unlike say using the Apple ProRes 422 (HQ) master transcode at 184 Mbps (at 25p) the 38 Mbps Apple ProRes 422 (Proxy) data rate is much more suitable for an online delivery format that Youtube & Vimeo can manage. Of course 38Mbps still adds up fast but if you need film grain to hold then this is the way to go.
My sweet spot is surprisingly high at 90-120% film grain on Film Convert. Before using just H.264 I really had to go below 30%.
Shot on the Canon 1DC in CLOG at 800 ISO
As a side note. You are never going to get around the problem that its a transcode of a compressed output and due to this it will always show compression. But it does help.