[MacPorts] #56934: ImageMagick depends on libav, libav not provided

[MacPorts]

#56934: ImageMagick depends on libav, libav not provided
--------------------------+------------------------
  Reporter:  mexon        |      Owner:  ryandesign
      Type:  defect       |     Status:  assigned
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:               |   Keywords:
      Port:  ImageMagick  |
--------------------------+------------------------
Changes (by ryandesign):

 * keywords:  imagemagick libav ffmpeg =>
 * owner:  (none) => ryandesign
 * status:  new => assigned
 * port:  imagemagick => ImageMagick


Old description:

> I'm trying to put together a timelapse video from individual frames,
> like:
>
> convert *.jpg output.mp4
>
> This produces:
>
> convert: delegate failed `'avconv' -nostdin -v -1 -i '%M%%d.jpg' '%u.%m'
> 2> '%u'' @ error/delegate.c/InvokeDelegate/1919.
>
> The issue is that it wants avconv, but avconv is not available with
> MacPorts.  See here:
>
> https://superuser.com/questions/568464/how-to-install-libav-avconv-on-osx
>
> As you can see from the answers, installing avconv is possible if you use
> MacPorts, but is very inconvenient.  Whereas with brew it's trivial.
>
> There has been an attempt to bring avconv into MacPorts here:
>
> https://trac.macports.org/ticket/50039
>
> It was rejected because "it appears that ffmpeg provides all this
> provides".  It seems not.  The current situation leaves ImageMagick in a
> broken state.

New description:

 I'm trying to put together a timelapse video from individual frames, like:

 {{{
 convert *.jpg output.mp4
 }}}

 This produces:

 {{{
 convert: delegate failed `'avconv' -nostdin -v -1 -i '%M%%d.jpg' '%u.%m'
 2> '%u'' @ error/delegate.c/InvokeDelegate/1919.
 }}}

 The issue is that it wants avconv, but avconv is not available with
 MacPorts.  See here:

 https://superuser.com/questions/568464/how-to-install-libav-avconv-on-osx

 As you can see from the answers, installing avconv is possible if you use
 MacPorts, but is very inconvenient.  Whereas with brew it's trivial.

 There has been an attempt to bring avconv into MacPorts [ticket:50039
 here]. It was rejected because "it appears that ffmpeg provides all this
 provides".  It seems not.  The current situation leaves ImageMagick in a
 broken state.

--

Comment:

 [http://www.imagemagick.org/discourse-server/viewtopic.php?t=24214
 According to the ImageMagick forum], it looks like ImageMagick used to
 require ffmpeg for reading video files, but as of late 2013 it will use
 either ffmpeg or libav/avconv, whichever is installed.

 It looks like ImageMagick does not declare a dependency on ffmpeg. Do you
 have it installed? If not, try `sudo port install ffmpeg`.

 I don't recall why ImageMagick doesn't declare a dependency on ffmpeg, but
 it might be because I would guess that most people use ImageMagick only to
 manipulate images; I didn't even know it could produce a video from a set
 of images. Adding a heavy dependency like ffmpeg would add overhead that
 most people probably wouldn't need. But maybe we should add a variant to
 the port for this.

 #42299 might be related or the same issue.

 If you would like MacPorts to offer libav/avconv, please re-open #50039
 and discuss there.

-- 
Ticket URL: <https://trac.macports.org/ticket/56934#comment:1>
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