Den 02. mars 2015 23:19, skrev Thomas Daede: > Do you know if the 1-second keyframe interval was also for reasons of > compute time? (It allows each GOP to be encoded in parallel). It > unfortunately seems a bit short for many streaming applications, and > also prevents rate control from being tested. > > At the moment, I run all codecs with rate control on in their constant > quality mode. Perhaps this is not the right thing to do.
I don't think that's even possible; when I looked at the VP8 code, I saw that if you turn on constant quality mode, rate control will disable itself - the code path for rate control is simply never reached. Other codecs may have other ways to deal with such a combination of parameters. One easy test to see how this works is to encode a clip four times: 1 - Rate A, quality X 2 - Rate B, quality X 3 - Rate A, quality Y 4 - Rate B, quality Y Most likely, the results will be pairwise equal, and you will then know which setting overrides the other. _______________________________________________ video-codec mailing list [email protected] https://www.ietf.org/mailman/listinfo/video-codec
