[gst-devel] Why does my pipeline block on preroll?

[wl2776]

Tried setting async=false.
1. If on xvimagesink, then the pipeline got to playing, but I didn't see a
picture, only sound.
The picture appeared again after seek event.

2. If on pulsesink, nothing changed.

I have studied the debug output from
--gst-debug=seek:5,mpeg2dec:9,mpegvideoparse:9 and have found that the
gst_mpegvideoparse_chain_forward function is not called, if no seek event is
issued.

However, if I use playbin2 instead of that pipeline, then this function is
called.
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