[HELP] what's the best way to QTGMC Deinterlace with no loss by using Hybrid?

[ssdde]

Keeping the original birtate when converting from MPEG2 to x284 or x285 is pointless to me. You just waste you storage space, nothing else. The perceived quality won't be better than in case of much smaller output file. Follow Selur's proposal on constant rate factor and its recommended values instead.

i only want the no loss file, don't care about the storage space.

if a 1080i AVC file, means x264 already, need to deinterlace with no loss to get a 1080P file , keep the same bitrate, using x264, average 1-pass, with Avisynth QTGMC, MPEG4 to MPEG4, the finished encoded file will be the same quality with no loss?

or in the Base tab, set the "video" to "passthrough all" to deinterlace to get the no loss quality file ?