How to debug Gstreamer on Windows

[Daniel Sperka]

Oops, I missed that both machines are windows machines. Sorry. d

On Fri, Mar 27, 2020 at 9:20 AM Daniel Sperka <djsperka at ucdavis.edu> wrote:

> Could it be that you are using elements that do not work on windows?
>
> A desktop app, for example, will have to create different audio sink
> elements for mac/linux/windows/. When I had this bug, the windows version
> failed when creating "osxaudiosink", as it should. I was sloppy in checking
> for NULL or return values when adding,linking in pipeline. When I try to
> run application, it fails when I try to preroll (change of state to PAUSE)
> because the pipeline is incomplete (no sink).
>
> My fix was to use the correct elements for different platforms - the
> project (Qt) that has code something like this:
>
> audioSink = NULL;
>
> *#if* defined(Q_OS_MAC)
>
> qDebug() << "make osxaudiosink for mac";
>
> audioSink = gst_element_factory_make("osxaudiosink");
>
> *#elif* defined(Q_OS_LINUX)
>
> qDebug() << "make alsasink for linux";
>
> audioSink = gst_element_factory_make("alsaudiosink");
>
> *#elif* defined(Q_OS_WIN)
>
> qDebug() << "make directsoundsink for win";
>
> audioSink = gst_element_factory_make("directsoundsink");
>
> *#else*
>
> qDebug() << "Unsupported OS.";
>
> *#endif*
>
>
> Q_ASSERT(audioSink);
>
>
>
> Dan
>
> On Thu, Mar 26, 2020 at 4:34 PM Yair Reshef <yair99 at gmail.com> wrote:
>
>> dependency walker sometime finds missing stuff.
>> try to prepend it with GST_DEBUG:7
>>
>> more here
>>
>> https://gstreamer.freedesktop.org/documentation/tutorials/basic/debugging-tools.html?gi-language=c
>>
>> On Fri, Mar 27, 2020 at 1:19 AM Erik Herz <erik at vivoh.com> wrote:
>>
>>> I have an app that runs on my Windows build machine but not on another
>>> windows machine.
>>>
>>> I get this error:
>>> gst_element_set_state() returns GST_STATE_CHANGE_FAILURE
>>>
>>> I suspect that I am missing a library.
>>>
>>> How can I debug what is happening?
>>>
>>> My App is QT-based.
>>> _______________________________________________
>>> gstreamer-devel mailing list
>>> gstreamer-devel at lists.freedesktop.org
>>> https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>>>
>> _______________________________________________
>> gstreamer-devel mailing list
>> gstreamer-devel at lists.freedesktop.org
>> https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>>
>
>
> --
> Daniel J. Sperka, Ph. D.
> UC Davis Center for Neuroscience
>


-- 
Daniel J. Sperka, Ph. D.
UC Davis Center for Neuroscience
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