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cogman

@ cogman @lemmy.world

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131
Joined
3 yr. ago

  • Star Trek: Starfleet Academy actor Karim Diané decides to do their AMA on Lemmy!

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  • It's possible, you copy the post id and put a number in front of it, like the following:

    #43294288@startrek.website

    However, it doesn't autoformat to a link (unfortunately). To do that you need to do regular links. IE: [link](#43294288@startrek.website) which produces this link

    Edit: Damn it, messed this up, just a sec let me read some more.

    Looks like it's simply not possible. There's open github cases around this and this particular feature was just dropped. Shame, I'd have liked the #postId@site format.

  • Progressive Texas organizers hail shock win as far-right Republicans left reeling

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  • Progressive dems have been cleaning up over the past year. Hopefully the DNC doesn't plug it's ears and ignore the obvious. There's certainly a good number of corporate democrats trying to make this out to be a nothing.

  • In a blind test, audiophiles couldn't tell the difference between audio signals sent through copper wire, a banana, or wet mud

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  • Regardless, I'd bet anything that you are not able to reencode blurays to 15mbps without substantial quality loss.

    It's crazy how confident you are about something you've never done.

    Yes, I've gotten transparent encodes with 15mbps. Lots of people have.

    If you don't believe me, go to the AV1 subreddit and ask "can you get a transparent encode with only 15mbps". Or just go read up on svt-av1 and av1an and do it yourself.

  • In a blind test, audiophiles couldn't tell the difference between audio signals sent through copper wire, a banana, or wet mud

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  • Look, this is just an incorrect oversimplification of the problem. It's popular on the internet but it's just factually incorrect.

    Here's a thread discussing the exact problem I'm describing

    https://www.reddit.com/r/AV1/comments/1co9sgx/av1_in_dark_scenes/

    The issue at play for streaming services is they have a general pipeline for encoding. I mean, it could be described as cheaping out because they don't have enough QA spot checking and special purposing encodes to make sure the quality isn't trash. But it's really not strictly a "not enough bits" problem.

  • In a blind test, audiophiles couldn't tell the difference between audio signals sent through copper wire, a banana, or wet mud

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  • I promise streaming services and CDNs employ world-class experts in encoding

    They don’t really care about the quality

    It's funny that you are trying to make both these points at the same time.

    You don't hire world class experts if you don't care about quality.

    I have a hobby of doing re-encoding blurays to lower bitrates. And one thing that's pretty obvious is the world class experts who wrote the encoders in the first place have them overly tuned to omit data from dark areas of a scene to avoid wasting bits in that location. This is true of H265, VP9, and AV1. You have to specifically tune those encoders to push the encoder to spend more of it's bits on the dark area or you have to up the bitrate to absurd levels.

    Where these encoders spend the bitrate in dark scenes is on any areas of light within the scene. That works great if you are looking at something like a tree with a lot of dark patches, but it really messes with a single light person with darkness everywhere. It just so happens that it's really easy to dump 2mbps on a torch in a hall and leave just 0.1mbps on the rest of the scene.

    That will unarguably provide a drastically worse experience on a high-enough quality tv than a 40mbps+ bluray. Like, day and night in most scenes and even more in others.

    I can tell you that this is simply false. And it's the same psuedo-scientific logic that someone trying to sell gold plated cables and FLAC encodings pushes.

    Look, beyond just the darkness tuning problem that streaming services have, the other problem they have is a QOS. The way content is encoded for streaming just isn't ideal. When you say "they have to hit 14mpbs" the fact is that they are forcing themselves to do 14mbps throughout the entire video. The reason they do this is because they want to limit buffering as much as possible. It's a lot better experience to lower your resolution because you are constantly buffering. But that action makes it really hard to do good video optimizations on the encoder. Ever second of the video they are burning 14mb whether they need those 14mb or not. The way that'd deliver less data would be if they only averaged 14mbps rather than forcing it throughout. Allowing for 40mbps bursts when needed but then pushing everything else out at 1mbps saves on bandwidth. However, the end user doesn't know that the reason they just started buffering is because a high motion action scene is coming up (and netflix doesn't want to buffer for more than a few minutes).

    The other point I'd make is that streaming companies simply have a pipeline that they shove all video through. And, because it's so generalized, these sorts of tradeoffs which make stuff look like a blocky mess happen. Sometimes that blocky mess is present in the source material (The streaming services aren't ripping the blurays themselves, they get it from the content providers who aren't necessarily sending in raws).

    I say all this because you can absolutely get 4k and 1080p looking good at sub-bluray rates. I have a library filled with these re-encodes that look great because of my experience here. A decent amount of HD media can be encoded at 1 or 2mbps and look great. But you have to make tradeoffs that streaming companies won't make.

    For the record, the way I do my encoding is a scene by scene encode using VMAF to adjust the quality rate with some custom software I built to do just that. I target a 95% VMAF which ends up looking just fantastic across media.

  • In a blind test, audiophiles couldn't tell the difference between audio signals sent through copper wire, a banana, or wet mud

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  • Blocky artifacts typically appear in low light situations. There will be situations where it might just be blocky due to not having enough bits (high motion scenes) but there are plenty of cases where low light tuning is where you'd end up noticing the blockyness.

  • In a blind test, audiophiles couldn't tell the difference between audio signals sent through copper wire, a banana, or wet mud

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  • People don't like hearing this, but streaming services tune their codecs to properly calibrated TVs. Very few people have properly calibrated TVs. In particular, people really like to up the brightness and contrast.

    A lot of scenes that look like mud are that way because you really aren't supposed to be able distinguish between those levels of blackness.

    That said, streaming services should have seen the 1000 comments like the ones here and adjusted already. You don't need bluray level of bits to make things look better in those dark scenes, you need to tune your encoder to allow it to throw more bits into the void.

  • 'No, That Is Not Your Job,' Say Critics After Schumer Claims 'Job' Is to 'Fight for Aid to Israel' | Common Dreams

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  • I'll be cynical, his job is to get elected. The way that has traditionally worked is by making constituents happy.

    He is failing at that job because he'll be primaried in his next election.

    As minority leader, his job is to become majority leader. Again, traditionally, by making the nation happy with the party. He's failing there because right now everyone (other than consultants) hates his fecklessness. Which is a major drag on the Democrat party.

    Senators need to show some backbone and oust him as minority leader, he's failing miserably. They are failing by playing nice with this loon.

  • MAGA ‘was all a lie’: Marjorie Taylor Greene torches Trump in scathing new interview

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  • It's all to move for another seat. She's politically savvy. She'll run for Gov or president or to be a VP pick. Building distance from today's MAGA is just a calculated move to make her look more moderate.

  • MTG defends protester shot by DHS and says people need to lose their ‘blinders’: ‘You are all being incited into civil war’

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  • She's going to run for Gov of GA. She needs to moderate to get that position.

  • ICE agents pull guns on police officers 'of color' and demand papers: MN chief

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  • This is where if police departments wanted to gain credibility, they'd be arresting the ICE agents for assault with a deadly weapon.

    Qualified immunity has a "reasonableness" portion to it. It's a pretty strong argument that ICE isn't being reasonable if a cop arrests them for assaulting a cop.

  • GOP Senators, Including Close Allies, Break With Trump on Criminal Probe Into Powell

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  • I suspect we may be seeing more of this. Whether or not it adds up to anything, IDK. Trump is fucking up business with his dipshit moves like tariffs and attacking Powell.

    No rich person in the US likes tariffs, they also don't like economic instability and inflation. Trump putting in a crony that lowers the interest rates to -1% will cause severe problems in the economy.

    Powell has by and large been pretty competent in his job. He was perhaps a bit slow on lowering interest rates but not in an indefensible manner.

  • I replaced Windows with Linux and everything’s going great

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  • The memory layout for windows is going to be different than it is under linux. A bad module could still be causing chaos but it might only really be affecting the RDP server rather than firefox.

    For CPU, can depend on how you are configured. If you haven't gone through the work of getting your power usage settings under control, linux likes to run the CPU clock frequency at 100% all the time rather than letting it ramp down. The two OSes also ultimately have different scheduling schemes which could be causing linux to put more pressure on various cores than what windows does.

  • I replaced Windows with Linux and everything’s going great

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  • Same hardware or different hardware? This sounds like a hardware issue.

    An app getting stuck like that is indicative of GPU/memory problems. Possibly the CPU overheating.

    Memtest would be in order to see if your memory is bad.

  • Marjorie Taylor Greene says she was ‘naive’ for believing Trump is man of the people

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  • He's certainly the establishment pick.

  • Free software has some glib naming conventions

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  • As a younger teen trying to get starcraft running on my linux box, my parents were definitely upset when they saw me browsing "winehq". They thought I was trying to get booze shipped to our house :D

  • Admiral saw alleged drug boat strike survivors as legitimate targets, defense official says

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  • When did the IDF start training our admirals?

  • Furious House Republican Warns More ‘Explosive’ Resignations Are Coming After Marjorie Taylor Greene

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  • Supreme Court weighs appeal to overturn ruling that legalized same-sex marriage nationwide

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  • Depends on if Roberts decides to retire or if Sotomayor dies. We'll get another whack job if either of those things happens. Not saying Roberts isn't a whack job, but he's about the most moderate conservative on the court right now. (God help me, Barret is a close second).

    No way he doesn't get replace with someone like Aileen Cannon.

    Alito or Thomas retiring will be a wash. Alito has said he'll retire, so expect that to happen in the next 3 years. But honestly, I highly doubt there's anyone as crooked as he is so it doesn't really matter.