PITIVI crashes when adding video clips with RGBA transparency enabled

[Ken VanDine]

Binary package hint: pitivi

When adding a video clip to the timeline pitivi crashes with the error below. The same video clip works on Lucid, I suspect this is related to rgba in gtk.

(pitivi:7794): GStreamer-CRITICAL **: Could not convert static caps "image/png, width = (int) [ 16, 4096 ], height = (int) [ 16, 4096 ], framerate = (fraction) [ 0.0, MAX ]"
Traceback (most recent call last):
  File "/usr/lib/pitivi/python/pitivi/discoverer.py", line 682, in _newDecodedPadCb
    self._newVideoPadCb(pad)
  File "/usr/lib/pitivi/python/pitivi/discoverer.py", line 631, in _newVideoPadCb
    gst.element_link_many(pngenc, pngsink)
gst.LinkError: failed to link pngenc0 with filesink0
Traceback (most recent call last):
  File "/usr/lib/pitivi/python/pitivi/timeline/track.py", line 891, in _compositionDurationChangedCb
    self.emit('duration-changed', duration)
  File "/usr/lib/pitivi/python/pitivi/signalinterface.py", line 145, in emit
    *args, **kwargs)
  File "/usr/lib/pitivi/python/pitivi/signalinterface.py", line 119, in emit
    res = cb(*ar, **kw)
  File "/usr/lib/pitivi/python/pitivi/timeline/timeline.py", line 1482, in _trackDurationChangedCb
    self._updateDuration()
  File "/usr/lib/pitivi/python/pitivi/timeline/timeline.py", line 1488, in _updateDuration
    self.emit('duration-changed', duration)
  File "/usr/lib/pitivi/python/pitivi/signalinterface.py", line 145, in emit
    *args, **kwargs)
  File "/usr/lib/pitivi/python/pitivi/signalinterface.py", line 119, in emit
    res = cb(*ar, **kw)
  File "/usr/lib/pitivi/python/pitivi/ui/mainwindow.py", line 974, in _timelineDurationChangedCb
    self._setBestZoomRatio()
  File "/usr/lib/pitivi/python/pitivi/ui/mainwindow.py", line 720, in _setBestZoomRatio
    ideal_zoom_ratio = ruler_width / float(timeline_duration / gst.SECOND)
ZeroDivisionError: float division

Gdk-ERROR **: The program 'pitivi' received an X Window System error.
This probably reflects a bug in the program.
The error was 'BadMatch (invalid parameter attributes)'.
  (Details: serial 46 error_code 8 request_code 132 minor_code 19)
  (Note to programmers: normally, X errors are reported asynchronously;
   that is, you will receive the error a while after causing it.
   To debug your program, run it with the --sync command line
   option to change this behavior. You can then get a meaningful
   backtrace from your debugger if you break on the gdk_x_error() function.)
aborting...
Trace/breakpoint trap

[Edward Hervey (bilboed) (bilboed-deactivatedaccount)]

Please re-assign this to gst-plugins-good package handling.

The initial error was fixed in gst-plugins-good by the following commit:
commit 2a5f368bc79d5fa7a1d234a0e06282973f9e6cf9
Author: Benjamin Otte <email address hidden>
Date: Mon Mar 8 22:57:34 2010 +0100

    png: fractions don't allow doubles

[Sebastien Bacher (seb128)]

ken, could you confirm if the issue is fixed with the current gstreamer?

[zsolt.ruszinyák (zsolt-ruszinyak)]

Actually, why is the importance "LOW"? As far as I know, Ubuntu 10.10 should come with rgba by default.

In my case PITIVI only crashes, no error messages. I wanted to disable RGBA transparency, but I somehow can't do that, it stays on even after disabling it. Could u help me how to do that, for I could test it?

[Luis de Bethencourt Guimerá (luisbg)]

The problem is in gstreamer/ubuntu, so closing the pitivi bug report.

[zsolt.ruszinyák (zsolt-ruszinyak)]

I have managed to disable transparency now (by uninstalling some packages) and PITIVI works again.