Harald will probably disagree, but the convention is to disable rate control for comparing objective metrics. Rate control is normally an application-specific configuration of the encoder which can add noise or bias if comparing different rate controls. Rate control strategies can often be abstracted to apply to any modern codec (with adaptive quantizers), so it is best to remove this source of noise/bias if you can¹t guarantee identical (not default) strategies across the comparison. Note that some GOP structures often include some basic rate controls by default, like different QP offsets for hierarchical B/P frames. This can also be a source of noise/bias unless configured identically across the comparison.
Mo On 3/2/15, 5:19 PM, Thomas Daede <[email protected]> wrote: 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. _______________________________________________ video-codec mailing list [email protected] https://www.ietf.org/mailman/listinfo/video-codec
