Option to output to another filename

[talha-asad]

Currently you support batch image processing nicely by offering destination directory option, however if a user wants to optimize just a single image with a different file name, he can't. I think having 2 parameters one for input and one for output can help in this case and it seems reasonable to have this support in this awesome optimizer.

[tjko]

Starting from v1.4.0, jpegoptim supports stdin/stdout. So, now there is couple ways to do what you want:

jpegoptim --stdout a.jpg > b.jpg

or

cat a.jpg | jpegoptim --stdin > b.jpg

[vortex852456]

To use stdin/stdout you have to use a shell. The binary itself is not capable of outputting to another filename, which in my opinion is a weakness/missing feature.

[ravgeetdhillon]

If anyone is stuck with this, you can get a little creative by doing this.

1. Create a copy of your original image and rename it to your intended output file name.
2. Optimize the copied version of your original image.

Here is a small bash script:

img='test.jpg'
cp $img ${img%.*}-optimized.jpg
jpegoptim ${img%.*}-optimized.jpg