Sharp convert to jp2 format (JPEG2000)

[hegyre]

Hello,
I'm using latest versions of sharp and libvips

What are you trying to achieve?
I want to convert images like .png to .jp2
I've compiled and installed libvips globally, with imagemagick, itself compiled with jpeg2000 support.

Have you searched for similar questions?
Only found that one from 2018: #1489

Are you able to provide a minimal, standalone code sample that demonstrates this question?
If you could help me understand what should I update in the code to support something like:

sharp(input)
  .toFormat('jp2')
  .toBuffer();

Thanks in advance.

[lovell]

The work to expose magick-based output has started with PR #2012

[hegyre]

OK so it seems that one should adapt that PR #2012 to allow support for additional imagemagick formats (like .jp2)

Thanks for your answer @lovell ! much appreciated.

[LosTigeros]

So is this finally a thing? I would like to use .toFormat('jp2'). I'd use webp instead but it's not supported everywhere yet so I need to use it with JPEG 2000 as fallback for Safari support.

[lovell]

In the same way that #2012 exposed a .gif() function for GIF output via *magick, this will need someone to do similar for .jp2(). Always happy to accept PRs, if you're able.

[inukshuk]

@lovell with 8.11 jp2 should be supported directly by libvips if compiled with libopenjpeg2, right? I suspect that this will make supporting the a dedicated .jp2() function more straightforward. I'd be happy to take a stab at this, if you would like to see this in included (I could also add openjpeg2 to sharp-libvips if you would like to include it by default).

[lovell]

@inukshuk Great, yes please, libvips 8.11.0 added jp2ksave (and jp2kload) so a PR to expose this API is welcome, although I'd prefer not to include openjpeg in the prebuilt binaries.

[hegyre]

Hello @lovell ,
Just curious about not including openjpeg in prebuild binaries.
Any specific reason ?
Thanks!

[lovell]

v0.29.1 is now available with support for JP2 when you compile sharp from source using a globally-installed libvips that has been compiled with support for OpenJPEG.

https://sharp.pixelplumbing.com/api-output#jp2