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FFmpeg 4.4

ffmpeg.org

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Re: FFmpeg 4.4

#31

Post by traspler »

phh wrote: post #23
red0point wrote: post #16

Sadly, HDR passthrough is still an open issue from 3 years ago: https://trac.ffmpeg.org/ticket/7037 I really hoped they could complete this behemoth of a task.

Looking at the comments in that ticket, I can understand why ffmpeg developers don't want to help those people, and the devs probably spoiled more time answering this annoying person than it would take to have fixed the issue, making them lose all motivation to work on that issue.

wow, this is crazy. I would never have imagined this level of a shitshow when you said "annoying"...

But what to do with such a person if you can't/won't ban them from posting? Delete his comments? Don't engage until he tires himself out?

Re: FFmpeg 4.4

#32

Post by mekkkkkk »

sergiotapia wrote: post #9
iod wrote: post #3

I am excited for AV1 stuff, included in the highlights: SVT-AV1 encoding and AV1 VAAPI decoding.

For a typical 1080p "linux iso" what filesize difference will there be between x265 and av1?

Since image quality is subjective it's hard to say exactly, but estimates I've seen is a 20-30% size reduction for the same quality in AV1 compared to HEVC.

Re: FFmpeg 4.4

#33

Post by fuzzy2 »

sergiotapia wrote: post #9
iod wrote: post #3

I am excited for AV1 stuff, included in the highlights: SVT-AV1 encoding and AV1 VAAPI decoding.

For a typical 1080p "linux iso" what filesize difference will there be between x265 and av1?

Cannot offer any data on that but I experimented with a SD TV series episode. HEVC and AV1 ended up at the same file size (few kilobytes difference) but encoding AV1 took over 10 times as long using rav1e.

Re: FFmpeg 4.4

#35

Post by bhargavauvinox »

Shameless plug:

While working with ffmpeg over the years, i always thought that FFmpeg should have a simple to use UI. I have recently started working on a desktop(electron) tool that wraps ffmpeg script in easy to use interface

Here is a video showing the tool in action https://www.youtube.com/watch?v=qqqiK6YnJu8

https://auvinox.com

Re: FFmpeg 4.4

#36

Post by janandonly »

on my Mac I ran Brew Upgrade ffmpeg and now the current version is 4.3.2_3 -> 4.3.2_4 ... so still not 4.4...

Do I need to wait on the Brew people to upgrade or did I make a mistake?

Also, I have no idea which codecs are native encoding and decoding on a M1 chip but I hope h.265 is included

Re: FFmpeg 4.4

#38

Post by bambax »

godmode2019 wrote: post #13

I think everyone was a txt file on their computer filled with FFmpeg commands. Care to share yours?

Here are two not present in the comments so far.

Print subtitles (useful for old TVs that can't select a subtitle from streams or files; I use this to get my kids to watch movies in English):

    -vf "ass=subtitle.ass"
or with .srt and in a huge yellow font

    -vf "subtitles=subtitles.srt:force_style='Fontsize=36,PrimaryColour=&H0000FFFF'"
Extract 1 second of video every 90 seconds (if you have very long footage of a trip from a dashcam and you don't know what to do with it, that makes for a much shorter "souvenir"):

    -vf "select='lt(mod(t,90),1)',setpts=N/FRAME_RATE/TB" -af "aselect='lt(mod(t,90),1)',asetpts=N/SR/TB"

Re: FFmpeg 4.4

#39

Post by pchm »

godmode2019 wrote: post #13

I think everyone was a txt file on their computer filled with FFmpeg commands. Care to share yours?

mov2gif:

    ffmpeg -i input.mov -vf "fps=10,scale=600:-1:flags=lanczos,split[s0][s1];[s0]palettegen[p];[s1][p]paletteuse" -loop 0 output.gif

Re: FFmpeg 4.4

#40

Post by mjaniczek »

godmode2019 wrote: post #13

I think everyone was a txt file on their computer filled with FFmpeg commands. Care to share yours?

  function grab-screen-lossless {
    ffmpeg -an -f x11grab -video_size 1920x1080 -framerate 60 -i :0.0 -c:v h264_nvenc -preset llhq -tune zerolatency -crf 0 -qp 0 "${1}"
  }
  
  function grab-screen {
    ffmpeg -an -f x11grab -video_size 1920x1080 -framerate 60 -i :0.0 -c:v h264_nvenc -preset llhq -tune zerolatency -qp 10 "${1}"
  }
  
  function vid_compress {
    ffmpeg -i "${1}" -codec:v libx264 -preset:v fast -pix_fmt yuv420p "${2}"
  }
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