QML MediaPlayer segfaults when changing source with Ogg Vorbis over HTTP

asked 2014-01-01 04:17:15 +0200

Elleo
3025 ●17 ●20 ●22

http://blog.mikeasoft.com...

When streaming Ogg Vorbis files over HTTP to a MediaPlayer element, the element will cause a segfault roughly 10% of the time.

I've created a test case here: http://mikeasoft.com/~mike/oggcrash.qml

When run with qmlscene it'll repeatedly play 4 ogg vorbis files for 1 second each. After changing source a few times the application will segfault, with a stack trace like:

#0  0x4dc0d1c8 in gst_ogg_pad_src_query (pad=<optimized out="">, query=0x2fc678) at gstoggdemux.c:336
#1  0x45289ebc in gst_pad_query () from /usr/lib/libgstreamer-0.10.so.0
#2  0x45567230 in ?? () from /usr/lib/gstreamer-0.10/libgstcoreelements.so
#3  0x45567230 in ?? () from /usr/lib/gstreamer-0.10/libgstcoreelements.so
Backtrace stopped: previous frame identical to this frame (corrupt stack?)</optimized>

The crash appears to occur when the MediaPlayer is in the BufferingState having just accepted a new source. This doesn't seem to happen if the ogg files are all stored locally.

(For context, this causes issues with a Libre.fm radio client I'm working on)

Thanks! Mike.