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

4 pointsby delducaover 5 years ago

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?)?<p>Thanks!

4 comments

antoineMoPaover 5 years ago

You can convert gifs to video with ffmpeg:<p><pre><code> ffmpeg -i image-%04d.png anim.mp4 </code></pre> You can use imagemagick ('convert' command) to make small gifs with dither, color reduction:<p><pre><code> 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</code></pre>

theriddlrover 5 years ago

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.

actionowlover 5 years ago

I use pngcrush, jpegtran, and gifsicle

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runjakeover 5 years ago

On macOS GUI, I like ImageOptim.<p>On Linux/macOS CLI, I like ffmpeg and ImageMagick, as appropriate.