[Okular-devel] Multimedia and JavaScript-Support in Okular

[Albert Astals Cid]

El Diumenge, 13 d'octubre de 2013, a les 18:10:54, Oliver Sander va escriure:
> Hi Albert, dear okular maintainers,

Hi ho

> I recently decided to hire KDAB again to implement a few missing multimedia
> features in Okular.  In particular, I wanted
> https://bugs.kde.org/show_bug.cgi?id=301607 done, which concerns showing
> the poster images of movies inserted into a pdf using the LaTeX movie15
> package[1].  This makes use of the JavaScript API, which hasn't been
> implemented yet.  Tobias had a look at it to estimate the price, and found
> that the necessary API is fairly big, and that the JS code makes quite a
> few assumptions about the viewer code, which only hold for the Adobe
> reader.  In his words, fixing 301607 would require large structural changes
> within okular, which are not worth the effort (and, of course, too
> expensive for my budget).

Yep

> I am writing this to you mainly for your information.  Unless those large
> structural changes are what you guys had planned anyway (unlikely), bug
> 301607 will not get implemented.  Also, according to Tobias, the same
> problem will reappear in many cases where JS support is needed.  This means
> trouble, as there are probably more important things relying on JS than my
> movie posters.

Yep, the heavy lifting for JS is needed for anything that needs JS, be it your 
feature or something else.

> There is another reason why it may not be worth a lot of effort to implement
> full movie15 support.  Movie15 claims that it is deprecated, and recommends
> that a third alternative LaTeX multimedia package called 'media9' used
> instead: http://mirrors.ctan.org/macros/latex/contrib/media9/doc/media9.pdf
> This is a very powerful package, but it requires flash support to run
> (basically, to show a movie, it embeds a small video player application
> written in flash into the pdf file, and expects the viewer to run the flash
> app).  I have always thought the idea a bit too outlandish to connect
> okular to a flash player, but maybe I am too timid?  Tobias thinks that
> this may be feasible to do, if the API is well done.
> 
> What do you guys think?

No idea what that Movie15 does, but we already "execute" urls with the 
appropiate viewer for that file type, so it should not be "that hard" if it 
does something similar to that.

Cheers,
  Albert

> 
> Please cc me and Tobias if there should be a reply, we are both not on the
> list.
> 
> Cheers,
> Oliver
> 
> 
> 
> 
> [1] The advantage of movie15 over the similar 'multimedia' package is that
> movie15 allows to embed the movie file into the pdf file (and not just link
> to it).  That way everything is in a single file, which is helpful when you
> need to change computers really quick because you have found out on stage
> that your graphics driver does not like the projector after all.