Ask HN: What's the Best Tool(s) for Optimizing JPEG, PNG, MP4 and GIF? | Hacker News Reader

Ask HN: What's the Best Tool(s) for Optimizing JPEG, PNG, MP4 and GIF?

4 pointsmococa5 comments

What's the best tool(s) for optimizing/shirinking lossy the folling formats JPEG, PNG, MP4 (to WEBM/AV1) and GIF (convert GIF to WEBM/VP9 maybe?)?

Thanks!

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You can convert gifs to video with ffmpeg:

    ffmpeg -i image-%04d.png anim.mp4

You can use imagemagick ('convert' command) to make small gifs with dither, color reduction:

    convert image-*.png +dither -colors 10 dither.gif
    convert image-*.png -ordered-dither 2x2 ordered_dither2.gif
    convert image-*.png -ordered-dither 4x4 ordered_dither4.gif
    convert image-*.png -colors 10 less_colors.gif

I encode MP4s with the H265 codec. For GIFs I use Photoshop's Export with a preview and reduce the colours until the quality starts to degrade noticeably.

I use pngcrush, jpegtran, and gifsicle

I ended up using the set ect & leanify for png and jpeg and gifsicle for gif. I wrote a small docker[1] image to setup and compile the tools.

Thanks for your feedback!

1 - https://github.com/skhaz/compression-tools/

On macOS GUI, I like ImageOptim.

On Linux/macOS CLI, I like ffmpeg and ImageMagick, as appropriate.

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