FFmpeg School of Assembly Language

#1

Post by davikr » Sat, Feb 22, 2025, 4:52 PM UTC

FFmpeg School of Assembly Language
github.com

Re: FFmpeg School of Assembly Language

#2

Post by netr0ute » Sat, Feb 22, 2025, 5:19 PM UTC

The only thing I don't like about this is the focus on x86 assembly, which is a sinking ship because RISC-V is coming to eat its lunch, FAST.

Re: FFmpeg School of Assembly Language

#3

Post by high_na_euv » Sat, Feb 22, 2025, 5:24 PM UTC

netr0ute wrote: post #2

The only thing I don't like about this is the focus on x86 assembly, which is a sinking ship because RISC-V is coming to eat its lunch, FAST.

HackerNews does not reflect real world well

Re: FFmpeg School of Assembly Language

#4

Post by ksec » Sat, Feb 22, 2025, 5:30 PM UTC

high_na_euv wrote: post #3

netr0ute wrote: post #2

The only thing I don't like about this is the focus on x86 assembly, which is a sinking ship because RISC-V is coming to eat its lunch, FAST.

HackerNews does not reflect real world well

The unwritten rule of HN:

You do not criticise The Rusted Holy Grail and the Riscy Silver Bullet.

Re: FFmpeg School of Assembly Language

#5

Post by do_not_redeem » Sat, Feb 22, 2025, 5:31 PM UTC

netr0ute wrote: post #2

The only thing I don't like about this is the focus on x86 assembly, which is a sinking ship because RISC-V is coming to eat its lunch, FAST.

How would you define "fast"?

Re: FFmpeg School of Assembly Language

#6

Post by KeplerBoy » Sat, Feb 22, 2025, 5:31 PM UTC

netr0ute wrote: post #2

The only thing I don't like about this is the focus on x86 assembly, which is a sinking ship because RISC-V is coming to eat its lunch, FAST.

I could understand if you wrote arm, because that's an architecture with actual marketshare. arguably more marketshare than x86-64 at this point, but you had to choose risc-v for the lols.

Re: FFmpeg School of Assembly Language

#7

Post by wolf550e » Sat, Feb 22, 2025, 5:34 PM UTC

netr0ute wrote: post #2

The only thing I don't like about this is the focus on x86 assembly, which is a sinking ship because RISC-V is coming to eat its lunch, FAST.

Where are the high performance RISC-V implementations? Those that compete with AMD Zen-5 and Apple M4? Or at least AWS Graviton 4?

Re: FFmpeg School of Assembly Language

#8

Post by xuhu » Sat, Feb 22, 2025, 5:37 PM UTC

"Assembly language of FFmpeg" leads me to think of -filter_complex. It's not for human consumption even once you know many of its gotchas (-ss and keyframes, PTS, labeling and using chain outputs, fading, mixing resolutions etc).

But then again no-one is adjusting timestamps manually in batch scripts, so a high-level script on top of filter_complex doesn't have much purpose.

Re: FFmpeg School of Assembly Language

#9

Post by 201984 » Sat, Feb 22, 2025, 5:39 PM UTC

netr0ute wrote: post #2

The only thing I don't like about this is the focus on x86 assembly, which is a sinking ship because RISC-V is coming to eat its lunch, FAST.

Wake me up when a RISC-V processor is on par with an N50.

Re: FFmpeg School of Assembly Language

#10

Post by slicktux » Sat, Feb 22, 2025, 5:49 PM UTC

Kudos for the K&R reference! That was the book I bought to learn C and programming in general. I had initially tried C++ as my first language but I found it too abstract to learn because I kept asking what was going on underneath the hood.