--gst-debug-disable

[Stefan Sauer]

On 11/07/2011 06:19 AM, Max Paklin wrote:
> As I mentioned in my original e-mail I simply dropped an .so that I built
> for PPC into a folder on FC15 desktop Linux. After adding that folder to
> GST_PLUGIN_PATH I ran
> gst-launch fakesrc ! fakesink
>
> That sure made plugin scanner unhappy and it generated this warning
> (gst-plugin-scanner:3022): GStreamer-WARNING **: Failed to load plugin
> './libcommons.so': ./libcommons.so: ELF file data encoding not little-endian
Aparrently the binary that you copied to your FC15 desktop is invalid.
Are you running the FC15 desktop on a PPC as well? Some or at least
compatible arch? The error comes a from levels below gstreamer. Fix
those first please.

Stefan
> The same warning is generated when my app is run, so it's not an output from
> gst-launch. I was looking for a way to suppress it.
> As it turned out (thanks to helpful folks at IRC) this particular spew is
> generated by "hard error" logging facility and simply cannot be suppressed
> using normal GStreamer debugging tools.
>
> Thanks for the links on Glib logging hooks! I will check them out.
>
> -- Max.
>
>
>
> -----Original Message-----
> From: gstreamer-devel-bounces+mpaklin=hotmail.com at lists.freedesktop.org
> [mailto:gstreamer-devel-bounces+mpaklin=hotmail.com at lists.freedesktop.org]
> On Behalf Of Tim-Philipp Müller
> Sent: Friday, November 04, 2011 5:47 PM
> To: gstreamer-devel at lists.freedesktop.org
> Subject: Re: --gst-debug-disable
>
> On Fri, 2011-11-04 at 00:57 -0700, Max Paklin wrote:
>
>> Is --gst-debug-disable flag supposed to work?
>>
>> I have a need to completely disable all output from GStreamer 
>> libraries under certain conditions. I thought I'd try 
>> --gst-debug-disable, but it seems to have no effect.
> Why do you think it has no effect? What output do you get?
>
> --gst-debug-disable just disables something that you would explicitly need
> to enable in the first place (if you're using released versions of
> GStreamer), so is probably not what you're looking for.
>
> GStreamer does not / should not output anything to stderr or stdout (other
> than g_warnings() for programming errors or when a plugin can't be loaded or
> so).
>
> gst-launch might however. gst-launch has a --quiet option, but that only
> affects stuff it would spew to stdout, not errors/stderr.
>
>
>> To test I simply copied an invalid .so file to one of directories 
>> included in GST_PLUGIN_PATH. Invalid in this case was simply a .so 
>> compiled for a different platform (PPC), while the test was on FC15 x86
> (0.10.35).
>> Running the following
>> gst-launch --gst-debug-disable fakesrc ! fakesink
>>
>> Resulted in this
>> (gst-plugin-scanner:3022): GStreamer-WARNING **: Failed to load plugin
>> './libcommons.so': ./libcommons.so: ELF file data encoding not 
>> little-endian
>>
>> The same happened when I tried all I could think of from my own app.
>> gst_debug_set_active(FALSE),
>> gst_debug_remove_log_function(gst_debug_log_default), GST_DEBUG=0, 
>> GST_DEBUG_FILE=/dev/null did not help.
>>
>> Can anyone recommend the right approach to ensure that no output is 
>> generated to either stdout or stderr no matter what the error is?
> GLib provides some hooks that you can use to suppress even g_warnings() like
> this in your application:
>
> http://developer.gnome.org/glib/stable/glib-Message-Logging.html#g-log-set-h
> andler
> http://developer.gnome.org/glib/stable/glib-Warnings-and-Assertions.html#g-s
> et-printerr-handler
> http://developer.gnome.org/glib/stable/glib-Warnings-and-Assertions.html#g-s
> et-print-handler
>
> Other than that, there's not much you can do really.
>
>  Cheers
>   -Tim
>
>
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