[SciPy-User] ANN: imageio v1.1
Almar Klein
almar.klein at gmail.com
Thu Feb 5 16:33:24 EST 2015
Hi Hjalmar,
Currently, there is no way to set fps for the webcam directly. You can
set the size though, which is likely to affect the fps (smaller size ->
higher fps. Just add e.g. ``size='768x576'`` to the arguments. Similarly
you can set the pixelformat. See
http://imageio.readthedocs.org/en/latest/format_ffmpeg.html
I am not sure if setting fps directly is possible via ffmepg. You could
look into it. I welcome a PR :)
- Almar
On 05-02-15 17:54, Hjalmar Turesson wrote:
> Hi,
>
> It looks and works beautifully.
> But... is there a way of setting the frame rate for webcams? I see that
> one can set fps for a writer, but I cannot find a way to set fps for a
> reader. And when using a webcam it makes sense to be able to control the
> fps.
>
> Thanks a lot!
> Hjalmar
>
> On Thu, Feb 5, 2015 at 6:40 AM, Christophe Bal <projetmbc at gmail.com
> <mailto:projetmbc at gmail.com>> wrote:
>
> That's a very good point so I will play with your library which has
> a so easy to use interface (I really like the way to walk through
> the frames of video).
>
> Thanks a lot for your answers !
>
>
> *Christophe BAL*
> *Enseignant de mathématiques en Lycée **et développeur Python amateur*
> *---*
> *French math teacher in a "Lycée" **and **Python **amateur developer*
>
> 2015-02-05 10:37 GMT+01:00 Almar Klein <almar.klein at gmail.com
> <mailto:almar.klein at gmail.com>>:
>
> > Working with pictures can be slow with Python so I would like to know if
> > imageio is a fast, or a slow package, or a medium one ?
>
> Imageio only reads and writes images. It does that pretty fast. E.g.
> png/jpg and other common formats are handled via the FreeImage
> library.
> Video via ffmpeg.
>
> When reading an image it yields a numpy array. For processing
> the data,
> you need to use other tools, e.g. scikit-image.
>
> - Almar
>
>
>
> >
> > *Christophe BAL*
> > *Enseignant de mathématiques en Lycée **et développeur Python amateur*
> > *---*
> > *French math teacher in a "Lycée" **and **Python **amateur developer*
> >
> > 2015-02-05 10:29 GMT+01:00 Almar Klein <almar.klein at gmail.com <mailto:almar.klein at gmail.com>
> > <mailto:almar.klein at gmail.com <mailto:almar.klein at gmail.com>>>:
> >
> >
> > > This looks nice. Is there some perfomance issue ?
> >
> > How do you mean?
> >
> > - Almar
> >
> >
> > >
> > >
> > > *Christophe BAL*
> > > *Enseignant de mathématiques en Lycée **et développeur Python
> > amateur*
> > > *---*
> > > *French math teacher in a "Lycée" **and **Python **amateur developer*
> > >
> > > 2015-02-05 9:34 GMT+01:00 Philipp A. <flying-sheep at web.de <mailto:flying-sheep at web.de>
> <mailto:flying-sheep at web.de <mailto:flying-sheep at web.de>>
> > > <mailto:flying-sheep at web.de
> <mailto:flying-sheep at web.de> <mailto:flying-sheep at web.de
> <mailto:flying-sheep at web.de>>>>:
> > >
> > > this really fills a niche well. good job!
> > >
> > > Almar Klein <almar.klein at gmail.com <mailto:almar.klein at gmail.com>
> > <mailto:almar.klein at gmail.com
> <mailto:almar.klein at gmail.com>> <mailto:almar.klein at gmail.com
> <mailto:almar.klein at gmail.com>
> > <mailto:almar.klein at gmail.com <mailto:almar.klein at gmail.com>>>>
> > > schrieb am Wed Feb 04 2015 at 15:43:47:
> > >
> > > Imageio is a Python library that provides an easy interface to
> > > read and
> > > write a wide range of image data, including animated images. video,
> > > volumetric data, and scientific formats. It is cross-platform,
> > > runs on
> > > Python 2.x and 3.x, and is easy to install.
> > >
> > > More information:http://imageio.github.io/
> > > Release notes:
> > >http://imageio.readthedocs.__org/en/latest/releasenotes.__html
> > > <http://imageio.readthedocs.org/en/latest/releasenotes.html>
> > >
> > > Regards,
> > > Almar
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