Eugen RochkoFeb 21

Interesting. 4K is mostly a lie.

https://www.youtube.com/watch?v=yN0H_WfWOp4

The Biggest Mistake in the History of Hollywood

YouTube
Show threadJeff AtwoodFeb 21
@Gargron without looking, is this about compression? Because yeah. JPEG lossy compression works on images as well as words (LLMs)
Show threadJuho MäntysaloFeb 21

@codinghorror @Gargron

Well, yes and no. The full argument was that:

- most of the digital film cameras are recording at less than 4k (2.4k was used as a median).
- those that use film, get digitalised before cutting for that ~2.4k, and that's the resolution on which efects are added, and which forms the defacto max-resolution.
=>so what they sell as 4K is often only 2.4k, with stretched pixels.

Further: to stream those streched extra-pixels, they tend to over-compress colour profiles.

Show threadGary Feb 22

@iju @codinghorror @Gargron yeah, streaming (as opposed to 4k Blu-ray) has effectively made 4k TVs pointless. They mostly target 15mb/s and most of the detail is lost. Same goes for the Dolby Vision dynamic HDR profiles they use for streaming.

Stick a high bitrate Blu-ray of a decent film transfer on a well calibrated display and you’ll be blown away, though.

Show threadPeter BindelsMar 17
@WiteWulf @iju @codinghorror @Gargron mbit/s or mbyte/s?
Show threadGary Mar 17
@dascandy @iju @codinghorror @Gargron megaBITs. it's traditional to measure bandwidth in bits per second rather than bytes
Show threadJeff Atwood
@WiteWulf @dascandy @iju @Gargron sometimes traditions are bullshit
Mar 17 at 8:14pmWeb
Show threadGary Mar 17

@codinghorror @dascandy @iju @Gargron harsh 🤨😀

Coming from a telecoms background, I find it easier to compare speeds of different things if they standardise on bits/second. I really don’t like it when apps default to bytes/second, moreso when they don’t respect lowercase b for bits and upper case B for bytes, and you have to guess what value they’re showing you.

Show threadJeff AtwoodMar 18
@WiteWulf @dascandy @iju @Gargron I know, I know, insert-xkcd-cartoon-about-competing-standards-here
Show threadFurbland's Very Cool Mastodon™Mar 18
@codinghorror @WiteWulf @dascandy @iju @Gargron 927, just for the record :P
Show threadPeter BindelsMar 18
@WiteWulf @codinghorror @iju @Gargron I would've assumed that if you used uppercase M. Millibits and bytes seemed incorrect.
Show threadSteve HoldenMar 18
@WiteWulf @codinghorror @dascandy @iju @Gargron And let’s not even start mega vs. mibi!
Show threadJeff AtwoodMar 18
@holdenweb @WiteWulf @dascandy @iju @Gargron oh good lawd
Show threadSteve HoldenMar 18
@codinghorror @WiteWulf @dascandy @iju @Gargron And sometimes there are good reasons for them. Bit streams aren’t always split into bytes; and bandwidth is a measure of flow rate not volume. Also telecom’s history, naturally.
Show threadGary Mar 18
@holdenweb @codinghorror @dascandy @iju @Gargron and if you want to be really obtuse: how many bits are in your byte? ‘Cos not all bytes have 8 😉
Show threadJeff AtwoodMar 18
@WiteWulf @holdenweb @dascandy @iju @Gargron #notallbytes
Show threadGary Mar 18
@codinghorror @holdenweb @dascandy @iju @Gargron ? 😀
Show threadGary Mar 18
@codinghorror okay, I’ve never heard of a 7-bit byte, but couldn’t resist
Show threadSteve HoldenMar 19
@WiteWulf @codinghorror @dascandy @iju @Gargron Loved the DECSystem10 36-bit architecture, with a variable byte size.