imageMagic | html5 single page WEB APP 核心使用canvas API开发

The property dam:assetState=processed gets set on the jcr:content (dam:AssetContent nodetype node) if the asset is successfully processed by the "DAM Update Asset" workflow. I would say that it is best to check the status using an AJAX call instead of keeping the connection open.

If you really would like to do this all synchronously then you could look into using "Synthetic Workflow" from ACS Commons: https://adobe-consulting-services.github.io/acs-aem-commons/features/synthetic-workflow/index.html

While the documentation for -draw's text operator only says that the string to render needs to be quoted if it has spaces, it appears it also needs to be quoted if it's numeric. So...

I didn't find a good way to do what I wanted without ImageMagic but the webhost finally agreed to install ImageMagic so I guess case closed

I think that png_write_image() only writes the image row data, so various headers or elements of meta-data are missing. I normally use png_write_png() to write the whole file.

I've attached some code that definitely works for me, in that the output can be read by Gimp, etc. I don't claim it's production-quality ;)

I don't really have a good answer for you. But I notice in the issues page of the wmf2canvas github repository there is a discussion about EMF.

Where the developer points to UDOC.js for WMF/EMF/PDF/PS conversion.

Udoc.js is MIT licensed, and has both a fromEMF.js and a ToContext2D.js, so it seems between the two you should be able to achieve your goal.

It looks like it is all done inbrowser, without external apis, but I haven't been able to try, since I don't have any EMF files.

There is also a link to an online demo, but I can't figure out for sure if they enabled EMF/WMF for the demo, or only pdf/ps.

Here's an easier way to reproduce your problem:

I think the error is doubling your calculated border size. Say page_width=1, then border_x=43, and your final page_width=1+2*43=87

If you want a border of ~40 on both sides, you probably want the following:

The code example from Meteor-Files doesn't export anything as a module, so when you import the default export, you get an empty object {}.

Additionally, as the example explains, that code should be on the server side only, which means you can't import it on the client.

I would solve this by having three files:

The key issue is that any gif picture or frame has an extremely limited palette of only 256 of the possible millions of colors in your video.

This is well explained here.

So, fairly recently (2015, version 2.6) ffmpeg got the palettegen and paletteuse filters that can generate better pallettes for each frame.

Therefore, make sure you are using a fairly recent version of ffmpeg.

So, there's your secret and key search term to get you to make high quality gifs in no time - study up on palettegen filters. Reddit beware.

Some references:

ffmpeg 2.6 release notes

ffmpeg docs

superuser

blog.phk.me