Speed was never my concern, judging by what you said I think putting the -as after tried to cut things between p-frames and that often caused probls with the cu

Speed was never my concern, judging by what you said I think putting the -as after tried to cut things between p-frames and that often caused probls with the cut, while putting it before started the cut at the last p-frame? Something like that, I don't use ffmpeg enough to remember what problems I was having but I remember what fixed it.