I have a Node.js server (irrelevant) that does image manipulation with ImageMagick. Basically, I can POST an image to the server and it will respond with the transformed image.
Right now I’m just writing the POSTed image to a file and launching ImageMagick as a child process which write the transformed image to a new file and then I send that new file to the POSTer. I would like to avoid writing to disk in order to speed things up. Can this ImageMagick process accept streaming input and give me a stream as output?
As an example, this is one of the most complicated commands I use right now:
/usr/local/opt/imagemagick/bin/convert \( '/Users/shawn/Work/vigour-img/originals/7ajy06' -resize '150x150^' -gravity 'Center' -crop '150x150+0+0' \) \( '/Users/shawn/Work/vigour-img/images/avatarMask.png' -resize '150x150' -gravity 'Center' \) -compose 'CopyOpacity' -composite '/Users/shawn/Work/vigour-img/out/1bl6jm9.png'
This relies on /Users/shawn/Work/vigour-img/originals/7ajy06 and /Users/shawn/Work/vigour-img/images/avatarMask.png existing on disk and writes the result to /Users/shawn/Work/vigour-img/out/1bl6jm9.png.
If instead I could stream the input files and get the result as a stream, there would be no need to write to disk, thus greatly improving performance (I think).
streamcommand you mention). Writing to a file or writing to an http response should be pretty much the same... As for thestreamcommand, it's unclear to me how to use it in my case. I will have to spend more time on this and try things out. Thanks for the tip.