Originally Posted by joshd2012
Things get kind of screwy when things aren't "pure" encodes. For instance, HD DVD encodes their 24p content with 30i flags. Are these 24p encodes?
This title was most likely encoded at 30fps with 60i flags. Is this a 30p encode?
Either way, 30p = 60i. Its only when doing 3:2 pull down that you get issues.
This is correct. The actual encode on the disc is 30p. The BD spec doesn't technically support 1080/30p, so the content is flagged as 1080/60i to make the stream spec-compliant.
Now the player has two choices at this point when it comes to decoding the stream:
1. The player can look at the actual encode, see that it is progressive, and decode appropriately.
2. The player can look at the flag, ignore the actual content encoding, and process according to the flag.
The better response would be option #1. If your player output is set to 1080/30p, then the player should decode this properly if the player looks at each progressive frame.
Keep in mind that we had NO CHOICE in how to flag this content for playback. The BD spec does not currently support 1080/30p, so our hands were tied.
But, to reiterate, the encode on the disc is 1080/30p.
(BTW, I am the production supervisor for all three versions of this release)