On Sat, Aug 28, 2010 at 6:44 PM, Alexander Kojevnikov <alexander(a)kojevnikov.com> wrote: Thank you for the clue. I'm especially thankful that I won't have to run valgrind for hours on end with my CPU fans whining at top-speed just to decode a video or mp3 :-) ... I will just go straight to debugging spek_spectrogram_put_pixel(). I've added your suggestion to my issue: http://code.google.com/p/spekle/issues/detail?id=1#c3 I added the following comment on your issue: http://code.google.com/p/spek/issues/detail?id=6#c5 ........... http://spekle.googlecode.com is a fork of Spek 0.6 specifically designed for batch use and for usage without an X server or GUI. It would be great if the changes for spekle could be incorporated back into Spek. Although down the road, some functionality I plan to add in spekle ( http://vamp-plugins.org ) may be out-of-scope for Spek. It's not something that'll be an obvious patch since I replaced spek.vala with http://spekle.googlecode.com/svn/trunk/spekle/src/spekle.vala and and spek-window.vala turned into http://spekle.googlecode.com/svn/trunk/spekle/src/spek-object.vala and there's a different set of build targets as well http://spekle.googlecode.com/svn/trunk/spekle/src/Makefile.am ... ........... Other code-mangling includes needing to add an extra callback parameter to the Pipeline() constructor: http://spekle.googlecode.com/svn/trunk/spekle/src/spek-pipeline.vala and lots of small changes to http://spekle.googlecode.com/svn/trunk/spekle/src/spek-spectrogram.vala . To recognize what changed, comment-outs of your original 'spek-0.6' code are done with "//" at the beginning of a line, and most of my changes are marked with an "NPM" comment. Since I just got 'spekle' running, and my current changes are a first-pass hacking of your original spek sources, it probably makes sense for me to continue doing development and debugging on 'spekle' and at some point in time in the future, submitting a more definitive patch for http://code.google.com/p/spek/issues/detail?id=6 . In case you're interested in collaborating on spekle, I added you as a committer (akojevnikov). It may also make sense to test out batch-mode ideas in spekle first and then move them back to 'spek' when they've settled down. Let me know how you wish to proceed, and thanks for making Spek available and GPL! -- Niels http://nielsmayer.com