while comparing the media descriptor with --expected-results, the return
values are not being handled properly, which results in wrong comparision
https://bugzilla.gnome.org/show_bug.cgi?id=748390
When folder name contains spaces during --medias-paths, it does not
create the media info, but still it shows as passed.
Returing failed during this case
https://bugzilla.gnome.org/show_bug.cgi?id=752611
This method is similar to runner_printf() but can be used
only once. The user needs to make sure all the pipeline
are in NULL state when this is called.
The method emits a "STOPPING" signal and at that point
overrides or monitors should do extra processing/checks if
needed.
+ Make use of it everywhere where it makes sense.
API:
gst_validate_runner_exit
GstValidateRunner::stopping signal
We do not want to know if the file is seekable etc, but in that case we
want to see that the results are stable throughout the various runs
Also make sure to report an understandable error if the media file info
could not be parsed
