HACKER Q&A
📣 delduca

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


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!

  👤 antoineMoPa Accepted Answer ✓
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
👤 theriddlr
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.
👤 actionowl
I use pngcrush, jpegtran, and gifsicle
👤 runjake
On macOS GUI, I like ImageOptim.

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