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Dav2d

jbkempf.com

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Re: Dav2d

#62

Post by plopilop »

Seems like the blog succumbed to the HN hug of death (`Actioning this file would cause "jbkempf.com//blog/2026/dav2d/" to exceed the per-day file actions limit of 160000 actions, try again later`), is there a copy available somewhere?

Re: Dav2d

#63

Post by juliie »

plopilop wrote: post #62

Seems like the blog succumbed to the HN hug of death (`Actioning this file would cause "jbkempf.com//blog/2026/dav2d/" to exceed the per-day file actions limit of 160000 actions, try again later`), is there a copy available somewhere?

it got archived by the wayback machine: https://web.archive.org/web/20260531115337/https://jbkempf.c...

Re: Dav2d

#65

Post by otherjason »

remix2000 wrote: post #36

> Make it fast on older desktop, by writing asm for SSSE3+ chips I guess 5 years ago (around the time when Intel stopped making SSE-only chips) is technically "older", but I wouldn't prioritize avx2 when devices intended for consuming media definitely experience much less pressure to upgrade than workstations…

Almost every Intel CPU released since 2013 has AVX2 support. Some Atom SKUs were longer holdouts, but the fraction of x86 CPUs shipped in the last decade that have AVX2 support is very high.

Re: Dav2d

#66

Post by kaka314 »

celsoazevedo wrote: post #64

"Too Many Requests" - https://web.archive.org/web/20260531130034/https://jbkempf.c... - https://archive.md/ln5UE

Too much traffic from HN?

``` Too Many Requests The page you have tried to access is not available because the owner of the file you are trying to access has exceeded our short term bandwidth limits. Please try again shortly.

Details: Actioning this file would cause "jbkempf.com//blog/2026/dav2d/" to exceed the per-day file actions limit of 160000 actions, try again later ```

Re: Dav2d

#67

Post by TingPing »

weiliddat wrote: post #49
breve wrote: post #40

Earlier quoted context omitted.

Hardly niche. My laptop isn't new and it has hardware AV1 decoding and encoding. My 10 year old iPhone 7 can play 1080p AV1 video in software for over 200 minutes with VLC. The iPhone 7 was released in 2016, a year and a half before AV1. The dav1d decoder is mighty. Netflix uses AV1: https://netflixtechblog.com/av1-now-powering-30-of-netflix-s... YouTube uses AV1. It's tough to be more mainstream than that. Right cli…

Supported is different from doing it well though. You do notice the performance hit even on TVs that playback YouTube videos on AV1. Even on 1080p videos running on AV1 on 1x, the TV system bogs down and any kind of interaction has a variable 1-3s lag. On some TVs if you do 1.25x the TV automatically "downgrades" the resolution to 480p to avoid dropping frames. I wish there was an option to still use VP9 / H.264 on t…

Youtube artificially limits the resolution, on mine if you cast the exact same video it doesn’t impose that limit and works fine.

Re: Dav2d

#68

Post by LoganDark »

jbk wrote: post #16
poly2it wrote: post #7

Sorry if this sounds naive, but does it make sense to write a codec library in C/ASM considering how well Rust is progressing, especially when, as the author puts it, AV2 decoding is roughly five times more complex than AV1 decoding ?

Because it's 5 times more complex, you need to get the maximum performance available. Therefore more ASM than ever. Rust does not bring more performance. Just more safety.

The safety can be worth it in certain cases. Like when handling untrusted input. And it's not just Rust: look at WUFFS for example. WUFFS can actually rival handwritten implementations in certain cases.

Re: Dav2d

#69

Post by hideout_berlin »

kaka314 wrote: post #66
celsoazevedo wrote: post #64

"Too Many Requests" - https://web.archive.org/web/20260531130034/https://jbkempf.c... - https://archive.md/ln5UE

Too much traffic from HN? ``` Too Many Requests The page you have tried to access is not available because the owner of the file you are trying to access has exceeded our short term bandwidth limits. Please try again shortly. Details: Actioning this file would cause "jbkempf.com//blog/2026/dav2d/" to exceed the per-day file actions limit of 160000 actions, try again later ```

i had that too once i used dyndns address my linux apache crashed when some one posted it here
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