Wiki edits: FAQ for system requirement (draft)

[Kolloom D]

> As a user of a Vega 64 with Kdenlive

Would you mind sharing your rendering profiles? Gpu rendering requires 
either h264_amf or hevc_amf. I got this information from this table 
https://trac.ffmpeg.org/wiki/HWAccelIntro


 > but viewing the project when several filters are used (specially 
rotation, resize and co)

I think proxy only deal with clips resolution but not the effects that 
are applied on top. I would have put "use preview quality under 
composite will also improve the performance" but there are some nasty 
bugs that makes preview and high quality effects inconsistent.

https://invent.kde.org/kde/kdenlive/issues/84