5 ms·

And the 4K content is where?

by suvelx 11y ago

martinko 11y ago
Netflix, Youtube.
- uptown 11y ago
  How's the quality from them? I got the sense, from articles I'd read, that it was overly compressed, but I've never seen it first-hand.
  - martinko 11y ago
    Yeah, the compression is visible. In my experience, it looks a bit worse than blu ray at full hd.
  - bitL 11y ago
    In short, horrible. 4k Youtube is comparable to 4:2:2 1080p scaled up to UHD. Let's see what 4k Blu-Ray brings this year...
  - daviddumenil 11y ago
    I've never seen any artifacts in the ~50hrs on content I've watched in 4K across Netflix and Amazon. The biggest picture quality issue is possibly the cameras themselves: a lot of TV looks uncomfortably real - like it was shot on a security camera. Though I did get the same impression from Breaking Bad in 4K, even though it was shot on 35mm.
    - joneholland 11y ago
      The "Soap Opera Effect" Is usually more pronounced from running at a frame rate higher than 24fps. For some reason we've become accustomed to 24FPS as realistic, and the smooth motion on a 120hz screen is jarring.
      - phn 11y ago
        There is a theory that a thing so smooth as 120hz falls in the "very real but not quite real" case, or the Uncanny Valley. Whereas 24fps tells our brain we're clearly watching a movie and so it's ok. Just like those highly realistic dolls from Japan where you can tell something is wrong but you can't quite put your finger on it.
  - MLR 11y ago
    It will be over compressed, current Blu-ray discs offer a maximum bitrate of 40Mb/s for the video component, though I think it's more typical for it to be around 25Mb/s. Netflix is currently using 15.6Mb/s for 4k streams, and I believe that's still using H264 rather than H265.
  - seanalltogether 11y ago
    I just grabbed the 4k stream from this video https://www.youtube.com/watch?v=6pxRHBw-k8M https://www.youtube.com/watch?v=6pxRHBw-k8M The stream bitrate appeared to be around 10-15 Mbps. I believe most 1080p bluray content starts at 25 Mbps.
gambiting 11y ago
I've actually got a phone that can record in 4K(Xperia Z5) and a GoPro Hero 4 Black which can also record in 4K, yet no screen to view it on. A 4K TV is definitely on my purchase list in the next couple years.
- bitL 11y ago
  Your cameras record 4k in 4:2:0 and heavily compressed. If you resize them to 1080p, you'd get average quality FHD. Real 4k is barely on the market for prosumers that want 4:4:4 RAW (maybe only Blackmagic 4k cameras).

And the 4K content is where?

by suvelx 11y ago

And the 4K content is where?

martinko 11y ago

Netflix, Youtube.

uptown 11y ago
How's the quality from them? I got the sense, from articles I'd read, that it was overly compressed, but I've never seen it first-hand.
- martinko 11y ago
  Yeah, the compression is visible. In my experience, it looks a bit worse than blu ray at full hd.
- bitL 11y ago
  In short, horrible. 4k Youtube is comparable to 4:2:2 1080p scaled up to UHD. Let's see what 4k Blu-Ray brings this year...
- daviddumenil 11y ago
  I've never seen any artifacts in the ~50hrs on content I've watched in 4K across Netflix and Amazon. The biggest picture quality issue is possibly the cameras themselves: a lot of TV looks uncomfortably real - like it was shot on a security camera. Though I did get the same impression from Breaking Bad in 4K, even though it was shot on 35mm.
  - joneholland 11y ago
    The "Soap Opera Effect" Is usually more pronounced from running at a frame rate higher than 24fps. For some reason we've become accustomed to 24FPS as realistic, and the smooth motion on a 120hz screen is jarring.
    - phn 11y ago
      There is a theory that a thing so smooth as 120hz falls in the "very real but not quite real" case, or the Uncanny Valley. Whereas 24fps tells our brain we're clearly watching a movie and so it's ok. Just like those highly realistic dolls from Japan where you can tell something is wrong but you can't quite put your finger on it.
- MLR 11y ago
  It will be over compressed, current Blu-ray discs offer a maximum bitrate of 40Mb/s for the video component, though I think it's more typical for it to be around 25Mb/s. Netflix is currently using 15.6Mb/s for 4k streams, and I believe that's still using H264 rather than H265.
- seanalltogether 11y ago
  I just grabbed the 4k stream from this video https://www.youtube.com/watch?v=6pxRHBw-k8M https://www.youtube.com/watch?v=6pxRHBw-k8M The stream bitrate appeared to be around 10-15 Mbps. I believe most 1080p bluray content starts at 25 Mbps.

gambiting 11y ago

I've actually got a phone that can record in 4K(Xperia Z5) and a GoPro Hero 4 Black which can also record in 4K, yet no screen to view it on. A 4K TV is definitely on my purchase list in the next couple years.

bitL 11y ago
Your cameras record 4k in 4:2:0 and heavily compressed. If you resize them to 1080p, you'd get average quality FHD. Real 4k is barely on the market for prosumers that want 4:4:4 RAW (maybe only Blackmagic 4k cameras).