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FFmpeg 6.0

ffmpeg.org

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Re: FFmpeg 6.0

#161

Post by BlackLotus89 »

jbk wrote: post #22

If you want to know a bit more about what is important in this major release, you can watch my presentation about FFmpeg 6.0 at Fosdem: https://fosdem.org/2023/schedule/event/om_vlc/ (Video + Slides) It’s a bit less dry than the changelog, notably for the evolutions of the APIs. What’s also important is the changes about the release schedule that we’ve been pushing with the community. Major version every year at the…

A bit off topic, but in your talk you said that intel, nvidia and amd encoder are worse than svt-av1. How much worse and which card is the best? Always encoding with ab-av1/av1an using svt-av1, but with the "right" preset it's still really slow. Which hardware encoder (in your opinion/experience) is the best to use (size/quality speed doesn't matter as much). If I want to convert my media server to av1 only should I stick with svt-av1 and eat the power/time-cost?

Re: FFmpeg 6.0

#162

Post by devwastaken »

arjvik wrote: post #16

I absolutely love ffmpeg, but for the life of me I cannot understand how its pipeline system works. Each time I need to use it, I attempt to construct the command myself, but end up giving up and consulting StackOverflow. Amazingly, someone has usually done the exact thing I need to do and posted their command line to StackOverflow, so I'm never out of luck! How do I actually start understanding how ffmpeg works? I w…

I've been trying to get color space and bit conversion to work with png's and bt2020 video. Apparently any time I use a png with ffmpeg's avif encoder it comes out too bright.

Re: FFmpeg 6.0

#163

Post by awill »

lxe wrote: post #6

Fun fact of the day: ffmpeg is written by Fabrice Bellard, who among other impressive things, wrote the JS PC emulator capable of running windows 2000 in a browser over 10 years ago that got me fascinated with emulators in general. https://bellard.org/jslinux/tech.html

This is ridiculous. Not only is Bellard no longer involved, but to say 'written' implies he did this by himself.

You wouldn't say Linux Torvalds wrote Linux. It's literally written by thousands of people.

I work with people like this, and I hate it when people say "I wrote X feature." No, no you didn't. It was written by a whole team.

Re: FFmpeg 6.0

#165

Post by dylan604 »

arjvik wrote: post #16

I absolutely love ffmpeg, but for the life of me I cannot understand how its pipeline system works. Each time I need to use it, I attempt to construct the command myself, but end up giving up and consulting StackOverflow. Amazingly, someone has usually done the exact thing I need to do and posted their command line to StackOverflow, so I'm never out of luck! How do I actually start understanding how ffmpeg works? I w…

If you don't use it every day, then this will be the typical result. But that can be said about anything, not specific to ffmpeg.

Practice, practice, practice. Eventually, you'll start thinking like ffmpeg. Knowing how ffmpeg labels the various streams inside a file is a great place to start. For example [0:a:1] means the second audio stream inside the first input. This is key for stringing together complex filter chains in the appropriately named -filter_complex.

There are some filters that require you to merge streams together so the processing is done evenly, followed by a split to get back to the original stream layout. amerge/channelsplit is a common combo in most of my commands.

Re: FFmpeg 6.0

#166

Post by dylan604 »

Aperocky wrote: post #18
arjvik wrote: post #16

I absolutely love ffmpeg, but for the life of me I cannot understand how its pipeline system works. Each time I need to use it, I attempt to construct the command myself, but end up giving up and consulting StackOverflow. Amazingly, someone has usually done the exact thing I need to do and posted their command line to StackOverflow, so I'm never out of luck! How do I actually start understanding how ffmpeg works? I w…

The ordering of the arguments changes behavior, I don't think that's a good thing or desired outcome, at most it's a bug_feature. It tend to happen when big project rolls out batteries itself, in this case command line parsing.

argument order is definitely a feature. with -ss being one that behaves differently depending on it's location in reference to -i. it's not an accidental thing and the desired outcome dictates where you place it. not understanding that just means you're not using it enough to grok it.

Re: FFmpeg 6.0

#167

Post by MuffinFlavored »

jraph wrote: post #48
lxe wrote: post #6

Fun fact of the day: ffmpeg is written by Fabrice Bellard, who among other impressive things, wrote the JS PC emulator capable of running windows 2000 in a browser over 10 years ago that got me fascinated with emulators in general. https://bellard.org/jslinux/tech.html

We probably should have a Fabrice Bellard accomplishments auto-comment on HN that starts by "Did you know…?" on those submissions.

If we studied Fabrice from the perspective of "how can all be more like him/as productive as him/as innovative/as smart", do you think the findings would basically come back "he's just genetically gifted"?

He's like the Lebron James of the tech world from what I can deduct.

Re: FFmpeg 6.0

#169

Post by shmerl »

stonogo wrote: post #68
shmerl wrote: post #5

What's the story with VAAPI AV1 encoding? Does it exist anywhere or not yet?

It exists only as a patch from Intel ( https://github.com/intel/cartwheel-ffmpeg/blob/master/patche... ) but I haven't seen any efforts to upstream it yet.

Thanks! At least changes look recent so there must be some plan to upstream it.
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