Using Gstreamer and souphttpsrc in Jupyter Notebook

[Jimmy Bush]

Well, I'd be happy to use the 1.16 version that comes with Linux Mint 20
(which I think is what apt would be), but I haven't found how to get
gstreamer to work in the Jupyter Notebook.  At least the conda-forge
version fixes the namespace error.

I have only found conda and pip ways of installing Jupyter Notebook.  If
there's an apt way to do that, that might get me further.

Barring that, should I continue to try the local build route?  I also found
the article linked below suggesting that GI_TYPELIB_PATH might be the
issue.  Does gstreamer/gobject-introspection rely on environment variables
that Notebook might not be seeing?

https://stackoverflow.com/questions/50440365/raise-valueerrornamespace-s-not-available-namespace-valueerror-namespace

On Sat, Sep 19, 2020 at 5:49 PM Tony Houghton <h at realh.co.uk> wrote:

> Couldn't you just use apt instead of conda?
>
> On Sat, 19 Sep 2020 at 20:48, Jimmy Bush <mr.jimmybush at gmail.com> wrote:
>
>> When I execute
>>
>>     conda install gst-plugins-good
>>
>> it causes gstreamer, gst-plugins-base, and gst-plugins good to be
>> installed.  All are 1.14.5.  Same behavior, as gst-inspect-1.0 reports "No
>> such element or plugin 'souphttpsrc'.
>>
>> After uninstalling these conda packages, I also attempted to install
>> jupyter notebook with pip in my conda workspace.  This installed okay, and
>> it didn't break my command line usage of souphttpsrc.  In the notebook,
>> however, when I try to gi.require_version("Gst", "1.0"), it gives me an
>> error that "Namespace Gst not available", even though I have
>> gobject-introspection and pygobject installed.  If this is an easier
>> problem to attack, it would let me use 1.16, which might be preferable
>> given that a lot of gst_plugins packages aren't available in conda.
>>
>> Thanks,
>> Jimmy
>>
>> On Sat, Sep 19, 2020 at 1:15 PM Tony Houghton <h at realh.co.uk> wrote:
>>
>>> It looks like soup is in gst-plugins-good, so try installing that too.
>>>
>>> On Sat, 19 Sep 2020 at 17:21, Jimmy Bush <mr.jimmybush at gmail.com> wrote:
>>>
>>>> Hey, everyone, sorry if this is the wrong forum for this.
>>>>
>>>> I have been working for the last week to run gstreamer inside a Jupyter
>>>> notebook, and for the most part I have been successful.  From the command
>>>> line of Linux Mint 20, I am able to run the 1.16.2 version of gstreamer
>>>> with gst-launch-1.0 call, and I use souphttpsrc and youtube-dl to watch a
>>>> youtube clip.
>>>>
>>>> From
>>>> http://lifestyletransfer.com/how-to-watch-youtube-videos-with-gstreamer/
>>>>
>>>> gst-launch-1.0 souphttpsrc is-live=true location="$(youtube-dl --format
>>>> "best[ext=mp4][protocol=https]" --get-url
>>>> https://www.youtube.com/watch?v=ndl1W4ltcmg)" ! decodebin !
>>>> videoconvert ! autovideosink
>>>>
>>>> Works great.  When I install Jupyter in conda, it pulls 1.14.5 versions
>>>> of gstreamer and gst-plugins-base.  I have been able to pop up the
>>>> videotestsrc within Jupyter Notebook as one would expect.  However, I
>>>> can no longer use souphttpsrc. If I gst-inspect-1.0 souphttpsrc, I get "No
>>>> such element or plugin 'souphttpsrc'".  Same is true if I conda install
>>>> gstreamer by itself.  From my readings, I think that means that
>>>> --enable-soup was not used.
>>>>
>>>> My questions:
>>>> 1) Has anyone gotten this to work?
>>>> 2) Is there a version of gstreamer for conda with soup enabled?
>>>> 3) Should my next step be to build gstreamer locally, enabling soup
>>>> myself?
>>>> 4) Would there be value in trying to publish a soup-enabled version to
>>>> conda-forge? Would 1.14.5, 1.16.2 or 1.18 be the best candidate should I
>>>> get that far?
>>>>
>>>> I've used Linux for several years, but this would be my first foray
>>>> into contributing to the open source community, so please help with any
>>>> baseline misunderstandings on my part.
>>>>
>>>> Thanks,
>>>> Jimmy
>>>>
>>>> _______________________________________________
>>>> gstreamer-devel mailing list
>>>> gstreamer-devel at lists.freedesktop.org
>>>> https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>>>>
>>>
>>>
>>> --
>>> TH
>>>
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>
>
> --
> TH
>
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