Viewing profile — kierank

Then you and your security friends will create lots of FUD about FFmpeg being "insecure" with lots of red and the word "critical" everywhere.

FFmpeg is developed almost entirely by volunteers. We have no "customers".

We in FFmpeg need all the instructions and we often need to do register allocations by hand.

I have tried with Grok3 and Claude. They both seem to have an understanding of the algorithms and data patterns which is more than I expected but then just guess a solution that's …

I am the author of these lessons. Ask me anything.

It's crazy that you have to use this custom "embedded" tooling when the vendor should be implementing support in vanilla Linux distros.

This is premature optimisation. The bus bandwidth and latency needed to get a few Mbps of compressed video to the PC is microscopic. It's completely unnecessary to lock yourself in…

Because latency is a distribution and these photos are often selected at the best-case P0 end of all the encode/decode processes whereas actually what matters is the worst case P99…

Backstage feeds go in uncompressed via HD-SDI and have a latency of lines (microseconds to single digit milliseconds). Totally different ballgame.

I wrote a blog post about how numbers like "30ms latency" are thrown around called "How to lie about latency": https://www.obe.tv/how-to-lie-about-latency/ It's left as an exercise…

I actually saw numerous issues with segments being one frame out of sync with the rest.

Imagine Ethernet was designed like this and you had to implement mandatory congestion control and other cruft. The layer of the stack that has knowledge of the content should be im…

I'm sure SAP reads mastodon and will be right on it

The Firefox PDF reader is atrocious. Opening any non-trivial PDF causes it to crash even on an i9 with 32GB of RAM. I guess this is because it's rendering the pdf to HTML.

VVC is marked as experimental as fuzzing continues on it.

(author of the post on X) We cannot tell volunteers to not do something (i.e help Microsoft) in the same way we cannot tell volunteers to do something.

(author of the post on X) To clarify, Microsoft didn't offer a one-time payment to fix any bug. A volunteer explained for free that a command line option had changed between FFmpeg…

Hi, this is a high priority ticket and FFmpeg is used in highly visible products all over the world. We have developers working for free while trillion dollar corporations want urg…

v210_planar_pack_8_c: 2298.5 v210_planar_pack_8_ssse3: 402.5 v210_planar_pack_8_avx: 413.0 v210_planar_pack_8_avx2: 206.0 v210_planar_pack_8_avx512: 193.0 v210_planar_pack_8_avx512…

x86inc.asm takes care of the different OS ABI differences for you.

FFmpeg code by definition is not "basic SIMD code". And it supports numerous other compilers other than LLVM.

That "20 minute patch" will need to be maintained for decades to come in FFmpeg, long after a standalone JPEG-XL library. Potentially centuries as archives like the Library of Cong…