examples: fix output_uri in test4
examples: fix output_uri in test4

clean the make_ogg_vorbis_profile () code.
remove extra second of execution time.
clean some comment typos.

luisbg/gst-editing-services,ahmedammar/platform_external_gst_editing_services,volodymyrrudyi/gst-editing-services,pitivi/gst-editing-services,MathieuDuponchelle/PitiviGes,MathieuDuponchelle/PitiviGes,cfoch/gst-editing-services,cfoch/ges,cfoch/ges,cfoch/gst-editing-services,luisbg/gst-editing-services,cfoch/gst-editing-services,cfoch/gst-editing-services,cfoch/ges,volodymyrrudyi/gst-editing-services,ahmedammar/platform_external_gst_editing_services,volodymyrrudyi/gst-editing-services,cfoch/ges,pitivi/gst-editing-services,pitivi/gst-editing-services,freesteph/gst-editing-services,MathieuDuponchelle/PitiviGes,freesteph/gst-editing-services,MathieuDuponchelle/PitiviGes,pitivi/gst-editing-services,freesteph/gst-editing-services