x264 has some very useful filters right now, but I'm missing a very easy to implement one: SelectRangeEvery
The behavior I'm looking for is just like the AviSynth version. I use it ofter to test different configurations and to need avisynth in between is annoying, because I'm using a RAW source and I don't have a 64-bit raw source avisynth filter, so i'm forced to use 32-bit x264
Considering that select_every has been implemented, I hope there's a possibility you'll consider implementing SelectRangeEvery as well.
Thanks in advance.