Did you find a solution yet? I'm also interested in getting CBR to work with H265, as it worked fine with H264. I tried the vt parameter for sout (not sure if this actually works) the following parameters for x265: vbv-maxrate=768,vbv-bufsize=768,qcomp=0,ratetol=0.1,minrate=768,maxrate=768,bufsize=7...