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<p class=MsoNormal><span class=text-cell>Here is what i have gathered is
supposed to happen to accomplish changing filesink output file locations in a
running pipeline. </span><br>
<br>
<span class=text-cell>The pipeline ends with "...! queue2
name="q1" ! matroksamux name-mux ! filesink name="fsink"
" </span><br>
<span class=text-cell>
I build mine using gst_parse_launch() </span><br>
<br>
<span class=text-cell>Status: </span><br>
<span class=text-cell> - The pipeline is in GST_STATE_PLAYING.
</span><br>
<span class=text-cell> - The g_main_loop is running. </span><br>
<span class=text-cell> - The first location output file is being
filled with data. </span><br>
<span class=text-cell> - There is a callback for bus messages. </span><br>
<br>
<br>
<span class=text-cell>When it comes time to swap output files: (for me
this is in a timer callbak) </span><br>
<span class=text-cell> - block the src pad of q1
</span><br>
<br>
<span class=text-cell> q1_srcpad =
gst_element_get_static_pad( q1, "src" ); </span><br>
<span class=text-cell> rc =
gst_pad_set_blocked_async( q1_srcpad, true, Q1Blocked, NULL ); </span><br>
<br>
<br>
<span class=text-cell>in the callback Q1Blocked() </span><br>
<span class=text-cell> - send an EOS to mux </span><br>
<span class=text-cell> - This should pass down to fsink and cause t
he mux to write its headers/trailers </span><br>
<span class=text-cell> </span><br>
<span class=text-cell> rc = gst_element_send_event(
mux, gst_event_new_eos() ); </span><br>
<br>
<br>
<span class=text-cell>in the bus messages callback handler, bus_call(): </span><br>
<span class=text-cell> - detect we got the EOS </span><br>
<span class=text-cell> - set mux and fsink to GST_STATE_NULL </span><br>
<span class=text-cell> - change the location </span><br>
<span class=text-cell> - unblock the q1 src pad </span><br>
<br>
<span class=text-cell> case GST_MESSAGE_EOS: </span><br>
<span class=text-cell> rc =
gst_element_set_state( mux, GST_STATE_NULL ); </span><br>
<span class=text-cell> rc =
gst_element_set_state( sink, GST_STATE_NULL ); </span><br>
<span class=text-cell>
g_object_set( G_OBJECT( sink ), "location", newOutFileName,
NULL ); </span><br>
<span class=text-cell>
gst_pad_set_blocked_async( that->q1src, false, Q1UnBlocked, NULL ); </span><br>
<br>
<span class=text-cell>in Q1UnBlocked() callback handler: </span><br>
<span class=text-cell> - return mux and fsink to GST_SATE_PLAYING </span><br>
<br>
<span class=text-cell> rc =
gst_element_set_state( mux, GST_STATE_PLAYING ); </span><br>
<span class=text-cell> rc =
gst_element_set_state( fsink, GST_STATE_PLAYING ); </span><br>
<br>
<br>
<span class=text-cell>And that's where I run into a brick wall. The rc
from setting fsink to GST_STATE_PLAYING is 2, GST_STATE_CHANGE_ASYNC.
</span><br>
<br>
<span class=text-cell>Why does filesink not return to playing? Does
setting it to STATE_NULL mean that it disconnects from the mux? The mux
src pad is an always pad and so is the filesink sink pad. Is the mux
unlinked from the queue? </span><br>
<br>
<span class=text-cell>Many thanks, </span><br>
<br>
<span class=text-cell>Wes</span><o:p></o:p></p>
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