Wrong duration

[Ilya Aleshkov]

Hi,

I'm capturing streams with my Logitech C922 Pro Stream Webcam:

gst-launch-1.0 -e ksvideosrc !
image/jpeg,width=1280,height=720,framerate=60/1 ! jpegdec ! videoconvert !
tee name=t t. ! queue ! x264enc tune=zerolatency speed-preset=faster
b-adapt=false ! matroskamux ! filesink location=video.mkv t. ! queue !
autovideosink

Then I play them inside my application:

gst-launch-1.0 filesrc location=video.mkv ! matroskademux ! h264parse !
avdec_h264 ! videoconvert ! glupload ! qmlglsink

Everything works great except one thing. I receive a
GST_MESSAGE_DURATION_CHANGED message twice while playing. The first
appearance (right before GST_STATE_PLAYING state) gives me absolutely
correct value of duration (via gst_element_query_duration() function). But
the second one (before EOS) tends to give a slightly bigger value (e.g.,
0:00:10.000333333 instead of 0:00:10.000000000). What does it mean? Is it a
bug? Should I completely ignore all these GST_MESSAGE_DURATION_CHANGED
messages? Now I query duration every time a pipeline enters
GST_STATE_PLAYING state.

Thanks,
Ilya
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