Is it possible to use magickload?

[0x6A75616E]

I'm trying to convert RAW images to JPG. I've got vips compiled with magick support, and the following cli command works:

vips magickload /test-photos/Nikon/RAW_NIKON_D3200.NEF /test-photos/Nikon/RAW_NIKON_D3200.JPG

Now, when I try the same thing with Sharp, I get a really low resolution JPG as the output.

const sharp = require('sharp');
var fs = require('fs');

const filename = `/test-photos/Nikon/RAW_NIKON_D3200.NEF`
var readStream = fs.createReadStream(filename);


(() => {

    var writeStream = fs.createWriteStream(`${filename}.jpg`);

    writeStream.on('finish', () => {
        console.log("DONE")
    })

    
    const conv = sharp({
        failOnError: false
    })

    conv
        .jpeg({
            quality: 100,
            force: true
        })

    conv.pipe(writeStream)

    readStream.pipe(conv)

})()

I suspect what's happening is that the raw input has an embedded jpg thumbnail, and that's what's being converted here. Is there a way for me to specify that I want to use the full image data as input?

[lovell]

I think Nikon RAW files masquerade as TIFF files. Given you're building your own libvips, try compiling it without libtiff support via ./configure --without-tiff

[0x6A75616E]

Thanks @lovell. That'd most likely work, but wouldn't that leave me with no tiff support overall? That's something I still use.

Seems like the magickload command would work well. I was only wondering if it had been implemented. If it hasn't already, I may be able to put together a PR.

[lovell]

sharp currently relies on libvips to determine the relevant loader for a given input and I'm unsure if the added complexity (error handling, testing etc.) of code in sharp to specify the loader is worth it.

Given you're building your own libvips, perhaps you could patch one/both of the relative priority values?

https://github.com/libvips/libvips/blob/97f5417aaa16c0eda19d98816b823bc92ebc93b3/libvips/foreign/tiffload.c#L182
https://github.com/libvips/libvips/blob/97f5417aaa16c0eda19d98816b823bc92ebc93b3/libvips/foreign/magick7load.c#L356

[lovell]

I hope this information helped. Please feel free to re-open with more details if further assistance is required.