Demoing some bugs in gstreamer on dispmanx (raspberry pi).

Bugs and how to reproduce them

776091: https://bugzilla.gnome.org/show_bug.cgi?id=776091

Background

Usually, to play a file when another finishes you set the pipeline state to READY, modify location on the src and then set state to PLAYING.

On Raspberry Pi with Dispmanx this doesn't work.

With the patch on bug 776091 you can set the state to NULL instead of READY, however this is not ideal as the screen flashes black.

Reproduce

Note - without the patch on 776091, neither of these will work:

   # Doesn't work
   python slideshow.py --enable-bcm rgba_pngs/*

   # Works, but with black screen
   python slideshow.py --enable-bcm --null-state rgba_pngs/*

Without the patch, if you play a video then it will freeze at the end.

776167: Advancing files too quickly seems to cause a black screen https://bugzilla.gnome.org/show_bug.cgi?id=776167

   python slideshow.py --delay=250 rgba_pngs/*

776165: JPEGS do not display or display a glitched screen https://bugzilla.gnome.org/show_bug.cgi?id=776165

   python slideshow.py jpegs/*

Fixed Bugs

776141: RGB pngs do not display: https://bugzilla.gnome.org/show_bug.cgi?id=776141

python slideshow.py rgb_pngs/*