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You've gone from complaining that the device has super compressed 720p which won't be as good as blue-ray, to claiming that you don't really know what it will l
by boucher 19y ago
You've gone from complaining that the device has super compressed 720p which won't be as good as blue-ray, to claiming that you don't really know what it will look like, but that any compression on 720p video will look worse than uncompressed 1080p.
The facts on blue-ray:
"Discs encoded in MPEG-2 video typically limit content producers to around two hours of high-definition content on a single-layer (25 GB) BD-ROM. The more advanced video codecs (VC-1 and H.264) typically achieve a video runtime twice that of MPEG-2, with comparable quality."
In all likelihood, iTunes is using H.264, or their newest variant. The same as blue-ray. So, in reality, the choice of codec matters a great deal, blue-ray is not uncompressed video (thus, 25GB holds a 2 hour compressed movie), and yes, 1080p is better than 720p.
And it's also worth noting that digital cable, and as far as I know every other on demand HD video service, is also "highly compressed" 720p.
- mattmaroon 19y agoHuh? First you said that uncompressed movies take up about 25gb for 2 hours. Blu-ray movies are generally around 25gb, which leaves the second layer free for extras or whatever. Then you said that "blue-ray is not uncompressed video (thus, 25GB holds a 2 hour compressed movie)" By your own math they would only take up 12.5ish gb if compressed. I actually am curious what digital cable uses. It's definitely 720p in my area, and probably compressed, but not highly.
- boucher 19y agoActually, Matt, you claimed uncompressed movies take 25GB for two hours. Right up here: http://news.ycombinator.com/item?id=99416 http://news.ycombinator.com/item?id=99416 What I said is, Blu-ray movies take up on average 25GB with MPEG2 compression. In other words, your original estimate of the size of things was wrong, as was your implication that blu-ray was uncompressed.