An issue piping to a readStream.

Hi,

First of all - thanks for the amazing tool.

@lovell can you help me figure out why this doesn’t work, please?

  const imageProcessor = sharp();
  imageProcessor
    .on("info", function (metadata) {
      var width = Math.min (1080, metadata.width),
        height = (width / metadata.width) * metadata.height,
        resizeArgs = {
          width: width,
          height: height,
          fit: sharp.fit.cover,
          position: sharp.strategy.entropy
        };
      console.log (`Resizing image with opts: ${JSON.stringify (resizeArgs, null, 4)}`);

      return sharp ()
        .rotate ()
        .resize (null, null, resizeArgs)
        .jpeg();
    });

  var readableStream = fs.createReadStream(stream.path)
    .pipe (imageProcessor);

I want to

• rotate to proper orientation (stripping the EXIF tag);
• resizing to maximum 1080px-wide image and keep the original size if the width is smaller than that (while keeping the aspect ratio);
• and encode as jpeg.

When doing this same thing without the metadata - it works like a charm. But since there is no max-width setting, I need to conditionally resize according to size and when I try to use the metadata somehow the image gets smaller in size, but doesn’t get rotated or resized to new dimensions…

[lovell]

Please see #236 for a possible future enhancement that would allow this.

[nicroto]

Thanks for the help, @lovell. Cheers!