Burning my first Blu-Ray disc – (question)

[Dave Haynie]

Sure sounds like the error message is due to your selecting a Blu-ray on DVD option, rather than real Blu-ray disc. That doesn’t make sense, since you’d never fit 90 minutes of MPEG-2 in HD on a DVD, but that’s what the message says to me.

While Vegas doesn’t follow the AVCHD disc spec for its Blu-ray on DVD mode, it’s close. Part of that is restricting all video to under 18Mb/s, since a Blu-ray drive is only guaranteed to be a 2x DVD drive… so, you want about twice the 9Mb/s DVD rate as a maximum speed.

Of course, DVDA only re-compresses assets it thinks it needs to. You have set an 18Mb/s cap, which should be fine for DVD if you want the recompression (at least under the AVCHD standard… except of course, AVCHD doesn’t actually support MPEG-2, only AVC, for high def on a standard DVD), but it makes more sense to create the proper video in the first place. And if you’re burning to a real BD, you can handle the 25Mb/s, 28Mb/s, or up to around 50Mb/s.

As for the warning about 28Mb/s on a “25Mb/s” stream… you probably chose the Blu-ray 25Mb/s template, right. That should be creating variable bitrate video… that’s what you want on any DVD or Blu-ray, to optimize performance, rather than the fixed rates you’re used to from HDV and other tape formats, in that case you’re matching directly to tape speed, so the video must exactly match.

-Dave