graphicsmagick

I know how to use GraphicsMagick to make a thumbnail of the first page of a pdf if I have a pdf file and am running gm locally. I can just do this: gm(pdfFileName + "[0]") .background("white") .flatten() .resize(200, 200) .write("output.jpg", (err, res) => { if (err) console.log(err); }); If I have a file called doc.pdf then passing doc.pdf[0] to gm works beautifully. But my problem is I am generating thumbnails on an AWS Lambda function, and the Lambda takes as input data streamed from a source S3 bucket. The relevant slice of my lambda looks like this: // Download the image from S3,

I am converting different images and pdf files with "gm" module for nodejs. Image types go successfully but when I want to convert PDF to image have problems. I need to covert only one selected page from pdf file to jpg/png. If I pass whole pdf file to "gm" it saves to image only first page, but I cannot find the way to save another page. gm(file).toBuffer(format.toUpperCase(), function (err, buffer) { // so in buffer now we have converted image } Thank you. for only first pdf page use: gm(file, 'pdf.pdf[0]').toBuffer(...) for only second pdf page use: gm(file, 'pdf.pdf[1]').toBuffer(...) gm

Here are the steps in which I want to do this: The user gives the server a link to an animated gif The server uses "request(url)" to retrieve the file The server generates a thumbnail of the gif's first frame The server uploads the thumbnail to Amazon S3 The problem exists in Step 3. I can't figure out a way to extract the gif's first frame. I would prefer to use GraphicsMagick but if there is another way you know of that works, I would be most grateful! NodeJS is being used. Lucio Mollinedo I don't know why this isn't in the documentation, but someone else answered this here on stackoverflow