[Bug 766261] inputselector: should proceed non-active pad buffer even if active pad reach eos

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=766261

--- Comment #3 from kevin <kevinbing.song at gmail.com> ---
Let me explain our problem:

One stream has two video tracks and one audio track. One of video track has
less duration than other track, so it will send eos while other track still
running.

Switch to the video track which reach eos. another video track buffer will be
blocked in inputselector. So demuxer will be blocked when call pad push buffer
for the blocked video track.

As demuxer run in one thread, audio pipeline can't get audio data buffer as
demuxer is blocked by video pad push buffer. So the whole playback pipeline is
be blocked.

Is my understand wrong or our design wrong?

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