Gstreamer debug not working

Question

I'm trying to debug an linux application that uses gstreamer library 0.10 but I can't get the gstreamer logs to work. Here's what I tried so far:

export GST_DEBUG="*:6"

GST_DEBUG=*:6 ./app

I also tried to put the flag option in the pipeline creation:

gst_parse_launch("appsrc name=myappsrc ! alsasink --gst-debug=*:6", NULL);

gst-launch doesn't work either I tried:

GST_DEBUG=6 gst-launch-0.10 filesrc location=out.opus ! oggdemux ! opusdec ! audioconvert ! alsasink

or

gst-launch-0.10 filesrc location=out.opus ! oggdemux ! opusdec ! audioconvert ! alsasink --gst-debug-level=6

I wasted a lot of time on this, some help would be very appreciated.

Answer 1

enable debugging for all elements :

gst-launch --gst-debug-level=5 videotestsrc ! autovideosink

enable debugging only for one element:

export GST_DEBUG=videoscale:5
gst-launch videotestsrc ! videoscale ! ffmpegcolorspace ! video/x-raw-gray, width=640,height=512 ! ffmpegcolorspace ! autovideosink