[maemo-developers] Problems with PyGst

From: Tomi Pieviläinen tomi.pievilainen at iki.fi
Date: Wed Jan 13 14:59:45 EET 2010
Ok, here goes.

All the time I'm wondering if the problems I get are from gst, pygst,
qt, pyside or something else, but perhaps someone here can point me to
the right direction, since there are people knowledgeable with gst,
pyside and maemo here.

http://koti.kapsi.fi/hukka/videolabel.py and
http://koti.kapsi.fi/hukka/simpletest.py are a simple app to open a
videofile and play it next to the buttons. It works most of the time
on desktop, though I always seem to get an

X Error: BadWindow (invalid Window parameter) 3
  Major opcode: 3 (X_GetWindowAttributes)
  Resource id:  0x2800284

when setting the X id.

But sometimes I get only audio and first:

X Error: BadWindow (invalid Window parameter) 3
  Major opcode: 2 (X_ChangeWindowAttributes)
  Resource id:  0x280028b
X Error: BadDrawable (invalid Pixmap or Window parameter) 9
  Major opcode: 55 (X_CreateGC)
  Resource id:  0x280028b
X Error: BadWindow (invalid Window parameter) 3
  Major opcode: 3 (X_GetWindowAttributes)
  Resource id:  0x280028b
X Error: BadGC (invalid GC parameter) 13
  Major opcode: 70 (X_PolyFillRectangle)
  Resource id:  0x340000a

and then a quick stream of:

X Error: BadGC (invalid GC parameter) 13
  Extension:    132 (Uknown extension)
  Minor opcode: 19 (Unknown request)
  Resource id:  0x340000a

Running on N900, I always fail to get video and these errors appear.
After repeated attempts I even got the N900 to crash and reboot. I'm
testing the script with the 9.mp4 and Nokia_N900.mp4, both on desktop
and N900.

A simpler script http://koti.kapsi.fi/hukka/qt-gst-playbin2-label.py
plays only audio on desktop without errors, but on N900 I see a black
window opening and immediately closing, with the same BadGC errors and
only audio.

Even simpler scripts
http://koti.kapsi.fi/hukka/qt-gst-videosrc-onewindow.py and
http://koti.kapsi.fi/hukka/qt-gst-playbin2-onewindow.py work always,
though with ogg (you can get it from
http://www.bigbuckbunny.org/index.php/download/) the framerate is
horrible due to cpu decoding (but that's not the point here, it

Tomi Pieviläinen, +358 400 487 504
A: Because it disrupts the natural way of thinking.
Q: Why is top posting frowned upon?
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