Alongside as I investigated further I found out staxrip is the least issue here - it's as I hoped a tool to pin-point the root cause. So as vdub2 is/was. The real issue wasn't being unable to display (DGDecNV.dll) the pictures served but when using x264.exe actually (also DGDecNV.dll).
Here's the solution that consisted of 3 different issues in the following order:
- Didn't let go not knowing for sure if I have the correct AviSynth+ version/package. So I looked up stuff on the web and found UniversalAviSynthInstaller which I applied successfully with option 7. From here on vdub2 also displayed a picture and worked well. It also worked well with encoding ... but that's the internal vdub2 x264 encoder, not a real external exe. Knowing I could not just post those news here and still asking for help whereas the issue lies with external applications I had to come up with a new plan...
- Since I could not find any suitable x264 vdprof to download on the web and had no idea how to set up external encoder myself I just went x264 command line. Of course, why did I not do this earlier - and look at DGDecNV manual how avs needs to be built, etc. Still encountering the same error when running x264.exe with the avs script applied. Crazy. Then I read your post about multiple dll's. Did a search on all fixed drives and encountered one - probably auto-copied - in UniversalAviSynthInstaller's AviSynthRepository plugin directory I immediately shift-deleted.
- Seeing nothing but "64bit" and "x64" mostly during researches got those terms stuck in the back of my head somewhere which made them pop out all of a sudden thinking of possible solution attempts I could maybe perform - makes me look up x264.exe version in staxrip package: 32bit. Not kidding. Of course immediately replaced with freshly downloaded x64 version.
From here on I am more than seeing how glad I can actually be about making this extraordinary upgrade
Quick test encoding job I ran:
25 minutes 1280x720 50fps 13mbit ts file from DVBS2 into 8bit x264 preset slow, crf21, resize 720x400px, yadif
Before (without DGDecNV): ~14 minutes, don't remember fps anymore
After (with DGDecNV): ~5 minutes, 120-130fps
Dear sirs, you gave me a lot of input and sooner or later pointed me into the right direction to find solution (salvation, ha!). Thank you a lot for all of your help
I'll mark this thread as resolved then and only have to fine-tune new staxrip 1.7 a bit more and also get more used to it