[HELP] Audio/video out of sync in output

[Selur]

Regarding deinterlacing you are at a dead end.
There's no qtgmc equivalent in ffmpeg.
Regarding mapping x264 options to ffmpeg, see: https://sites.google.com/site/linuxencod...eg-mapping

Also, since I selected the "fast" preset, do the settings from other tabs. namely "Frames", "Rate Control", etc... matter and if yes, are they reflected in the command line from the "Base" tab?

Yes, the settings in the other tabs matter. When you applied the 'fast' preset, Hybrid adjusted all settings covered by the preset to those values.
So if you change a setting in any of the tabs it will change the command line.

I tried about 7 ffmpeg GUIs and they seem to not have the sync issue as you suggested,

Yup, that's the downside of processing audio&video in different processes you can't adjust one to problems of the other, which is why Hybrid is intended for non-broken/defect content.
You can also try Handbrake, but it also doesn't have QTGMC or something on it's level.

Cu Selur