Ask questions to BD authoring and compression insider "2themax"

[Icemage]

Originally Posted by 2themax

Yes, but not in the sense that I think you are asking. If you did it for a an entire scene, you'd run into the same problems are using a constant bit rate. Think of it more along the lines of being used if there was a shot with quick motion or an explosion.

That was exactly what I was referring to - really, really brief high intensity scenes like a fast camera pan or a large explosion. If I understand this correctly, you could try to ease off on the buffer by making use of B/P frames right before the high-intensity scene, then make use of the available extra overhead and use some extra I-frames to cover the trouble spot so your quantization levels don't go out the window (so you're actually reading data out of the buffer faster than it's coming off of the Blu-ray disc, if only for a moment, and even there you wouldn't be able to sustain it for more than a small number of frames).

Is that sort of how it works? If so, it seems like this would be a pretty work-intensive process, as you'd have to micromanage the encoding process on a nearly frame-by-frame basis for this. Are there tools in place to handle this sort of thing on a more routine basis in the existing encoding suites you've worked with?