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Cake day: August 6th, 2023

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  • M-Discs had merit in the DVD era. It’s a common refrain of those who don’t know the intricacies and read a wired article years ago to claim they mean anything in the Blu-ray era. They don’t.

    Standard Blu-ray Discs have all the technologies that supposedly make m-discs so long lasting and as far as media that isn’t continuously updated and hashed from live storage medium to live storage medium (cold, archival storage unpowered) they are about as good as you’ll get.

    They are much tougher than DVDs. Of course a variety of things go into how long a disc remains readable and without damage to data including luck with regards to no impurities in the batch. Even m-disc themselves based their longest claims off storage in ideal situations like an inactive salt mine (commonly used for archives by governments). Kept out of sun, away from extreme heat (including baking in uninsulated 120 degree F heat all summer year after year), away from high humidity and away from UV exposure to the data side of the disc as well as scratches and such and they should last a quarter to half a century, some more.

    In the Blu-ray era m-discs are just an overly expensive brand.




  • It should be considered illegal if it was used to harm/sexually abuse a child which in this case it was.

    Whether it should be classed as CSAM or something separate, I tend to think probably something separate as a revenge porn type law that still allows for distinguishing between this and say a girl whose uncle groomed and sexually abused her while filming it as while this is awful it can (and often does seem) be the product of foolish youth rather than the offender and those involved all being very sick, dangerous, and actually violent offending adult pedophiles victimizing children.

    Consider the following:

    1. Underage girl takes a picture of her own genitals, unfortunately classified as the unhelpful and harmful term “child porn” and she can be charged and registered as a sex offender but it’s not CSAM and -shouldn’t- be considered illegal material or a crime (though it is because the west has a vile fixation on puritanism which hurts survivors of childhood sexual trauma as well as adults).

    2. Underage girl takes a picture of her genitals and sends it to her boyfriend, again /shouldn’t/ be CSAM (unfortunately may be charged similarly), she consented and we can assume there wasn’t any unreasonable level of coercion. What it is unfortunately is bound by certain notions of puritanism that are very American.

    3. From 2, boyfriend shares it with other boys, now it’s potentially CSAM or at the least revenge porn of a child as she didn’t consent and it could be used to harm her but punishment has to be modulated with the fact the offender is likely a child himself and not fully able to comprehend his actions.

    4. Underage boy cuts out photo of underage girl he likes, only her face and head, glues it atop a picture of a naked porn actress, maybe a petite one and uses it for his own purposes in private. Not something I think should be classed as CSAM.

    5. Underage boy uses AI to do the same as above but more believably, again I think it’s kind of creepy but if he keeps it to himself and doesn’t show anyone or spread it around it’s just youthful weirdness though really he probably shouldn’t have easy access to those tools.

    6. Underage boy uses AI to do same as 4-5 but this time he spread it around, defaming the girl, she/her friends find out, people say mean things about her, she has to go to school with a bunch of people who are looking and pleasuring themselves to fake but realistic images of herself against her consent which is violating and makes one feel unsafe. Worse probably being bullied for it, mean things, called the s-word, etc.

    Kids are weird and do dumb things though unfortunately boys especially in our culture have a propensity to do things that hurt girls far more than the inverse to the point it’s not even really worth talking about girls being creepy or sexually abusive towards peer-aged boys in adolescence and young adulthood. To address this though you need to address patriarchy and misogyny on a cultural level, teach boys empathy and respect for girls and women and frankly do away with all this abusive pornography that’s super prevalent and popular which encourages and perpetuates abusive actions and mentalities towards women and girls, this will never happen in the US however because it’s structurally opposed to being able to do such a thing. Also couldn’t hurt to peel back the stigma and shame around sexuality and nudity in the US which stems from its reactionary Christian culture but again I don’t think that will ever happen in the US as it exists, not this century anyways.

    Obviously not getting into adults here as that doesn’t need to be discussed, it’s wrong plain and simple.

    Bottom line I think is companies need to be strongly compelled to quickly remove revenge-porn type stuff (regardless of the age of the victim though children can’t deal with this kind of thing as well as adults so the risk of suicide or other self-harm is much higher so it should be treated as higher priority) which this definitely is. It’s abusive and unacceptable and they should fear the credit card companies coming down on them hard and destroying them if they don’t aggressively remove it and ban it and report those sharing it. It should be driven off the clear-web once reported, there should be an image-hash data-set like that used for CSAM (but separate) for such things and major services should use it to stop the spread.


  • So first it’s client-side scanning for CSAM. Not without some nobility. But the problem is once you wedge open that door it’s technically possible to do it for other things and so you become compelled to.

    It’ll move from just CSAM to stopping and tracking “propaganda” as deemed by them which will be narrow-ish at first (anything pro-Russia, RT links, etc) but gradually expand over time to anything outside the mainstream branded as extremist (and guess what, privacy advocates will definitely fall within that label). And once that’s in place the private stake-holders, copyright holders will come knocking, they’ll say rightly so “hey you have the capability right now, we demand you implement client-side scanning to detect copyright violations” and then that will be ordered by a court, further enshrined by a law and oh look now you can no longer send political thought that the ruling regime disagrees with, can no longer surf the high seas, and so on and so forth. Congratulations and please enjoy living in the “garden” of Europe.




  • What are you average file sizes for movies and series?

    Movies? 4-8GB for most 60-120 minute features. TV shows. For live action 800MB/episode, 500MB/ episode for animation. For hour long stuff probably 1.2-1.6GB/episode.

    What would you do? what’s your target size for movies and series? What bitrate do you go for in which codec?

    HEVC 10 bit. I target in the 7000-9000kbps bitrate range generally. For animation that can be as low as 3000-5000kbps. Sometimes a bit higher for very grainy old films, occasionally a little lower for grain less modern digital camera work that hasn’t had digital grain added.

    If you want to maximize space savings without losing quality you have to understand what needs more bitrate and what can do with less. Across the board you could do something like CRF 20 but you’d have outliers where you don’t get enough bitrate and those where you still end up with rates of 14,000kbps.

    The above is for 1080p content.

    If you can stand HD video content at 2-3000kbps more power to you but on a large TV I can tell. I think even being reckless and not caring about future-proofing less than 6000kbps is a bad idea for anything but TV shows. Even those I think outside animation you want minimum 2000kbps for 1080p.



  • DVD’s max out at about 580p (for PAL, NTSC is 480p), resolutions are measured by the number of horizontal lines of pixels (counted from top to bottom of video/screen), not vertical which at 4:3 square aspect ratio on dvds does tend to be 720 pixels (by contrast full resolution HD video’s number of vertical lines is 1920 while it’s horizontal lines are of course 1080, hence 1080p). You’re not the first person to be confused by this.

    Professional encoders who fully understand the encoders and the schemes in use and care about not seeing artifacting or low quality would never intentionally go as low as 300mb for a feature length movie of even an hour. Yes there are people who do such things but they’re not well regarded and it won’t look even passable on anything larger than a phone screen.

    Recognized quality groups that seek low sizes might get an animated feature (less bitrate needed due to lack of fine detail in animation vs real film) in SD quality down to around that. But for most live action content the sizes I see from the best of the best concerned with smaller release sizes are in the 900mb to 1.5GB range for 60-90 minute features.

    300mb for a 90 minute live action feature even in SD is just not going to look good, some of the groups who get those sizes make them look even half-passable by running pre-filters in virtualdub that smooth, reduce grain and detail, etc before passing to the encoder. That kind of thing is way beyond anything you’re going to learn in a few youtube videos though, that’s advanced stuff with scripting.

    Think about it this way, if you shoot for 1GB encodes with 265 or AV1 you can store over 900 movies on a 1tb drive which can be had for well under a hundred dollars.

    I would like the best and fanciest algorithms to have least dataloss.

    There is no magic that will get you where you want. If you want detail preserved you need more bitrate which translates to larger sizes. Modern codecs like HEVC and AV1 mean you need as much as 1/5th the bitrate you needed with old MPEG2/4 encoding schemes used on DVDs, that’s darn good savings but it has its limits.

    Do as you will but anything live action (non-animated) significantly under 1000kbps average bitrate is going to look awful on a 1080p screen and much worse than what it would look like if you popped your dvd in the disc drive and played it from there.

    Opus is fine if you’re not worried about compatibility and just playing on a computer.


  • I really like the one I have. A relative has a much older model and it still works fine too.

    It’s very responsive and the 4k models are quite powerful and future proofed IMO. If you have an iPhone you can quickly use it as a remote too.

    Paired with infuse app it even does local streaming from my media server well.

    And it’s cheaper to get this year’s top of the line Apple TV than it is the 2019 Nividia shield pro.


  • Majestic@lemmy.mltoAsklemmy@lemmy.mlProblem with Lenovo B50
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    3 months ago

    Well re-applying thermal paste is a big matter. I’d try stressing it and seeing if you can force it after cleaning the vents.

    So do things to stress the processor and see if you can force it to happen repeatedly. If it is a thermal issue you should be able to cause it by inducing high load. If you can’t it points more towards other issues. A fault in RAM or the motherboard for example, a loose module or connection, etc.

    And just FYI if you need more help in future this community isn’t intended for it. Try posting in a tech or computer help community for a better chance more people engage.


  • Randomly or after a set time of use or intense use? Could be processor is overheating past safety thresholds (new thermal paste could fix this IF that’s the issue).

    I’d try cleaning vents and fans before changing thermal paste though. Could be they’re clogged and not working right.

    Failing that it could be multiple things. But I’d try to address cooling being adequate first. Make sure vents are unobstructed during use. Use it on a flat hard surface, clean the vents with a vacuum and/or canned air duster.


  • As others mentioned having a good encoder is an issue for AAC. And some skills in using it, tuning, etc.

    Nearly all quality releasers now use AC3/EAC3 or FLAC. Tigole is the last one who uses AAC to my knowledge and the rest of the QXR group rolls their eyes at it.

    You’re not going to get a meaningful reduction in bitrate and file size with AAC over EAC3/AC3 without loss of quality. We’re talking maybe you can shave 2-300kbps off an AAC version versus an AC3 5.1 track. And it’s tricky. So much so no one other than that one person I mentioned bothers. At least no one accepted in the higher echelons as competent in creating acceptably transparent encodes.

    If a source has EAC3 (itself capable of up to halving the bitrate required vs AC3) or AC3 I’d recommend keeping it as they tend to already be efficient. They’re also universally compatible as codecs. Re-encode those big 1500kbps DTS tracks and those even bigger monster lossless Dolby and DTS tracks but I’d leave efficient codecs like AC3 alone.

    That said it’s up to you what sounds good. If you’re using lower end stuff and can’t tell the difference after trying a few different test videos with different types of sounds then go for it.