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Hello List</div>
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I have a problem with seek.
<div class="ContentPasted0">Occasionally it happens that I have a deadlock when I try to reverse. Happens every 5-20 times.</div>
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<div class="ContentPasted0">I have had this problem for several years now.</div>
<div class="ContentPasted0">It is a mobile app on Android and iOS. So far the problem is only known to occur on Android, but that doesn't mean it can't occur on iOS.</div>
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<div class="ContentPasted0">The structure of my pipeline</div>
<div class="ContentPasted0">httpsoupsrc -> src-queue -> typefind -> demux -> audioqueue -> aacparse -> capsfilter -> appsink</div>
<div class="ContentPasted0"> (so from demux) -> videoqueue -> h264parse -> capsfilter -> appsink</div>
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<div class="ContentPasted0">For the implementation of the Seek function I tried different approaches. My current implementation looks like this:</div>
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<div class="ContentPasted0">static void</div>
<div class="ContentPasted0">seek_to_time(CustomData *customData,</div>
<div class="ContentPasted0"> gint64 seekToPos)</div>
<div class="ContentPasted0">{</div>
<div class="ContentPasted0"> if (!GST_CLOCK_TIME_IS_VALID (customData->duration)) {</div>
<div class="ContentPasted0"> LOGW ("Seek failed! Invalid duration\n");</div>
<div class="ContentPasted0"> }</div>
<div class="ContentPasted0"> LOGI ("seek_to_time to %" G_GINT64_FORMAT "\n", seekToPos);</div>
<div class="ContentPasted0"> if(!gst_element_seek_simple(customData->pipeline, GST_FORMAT_TIME, (GstSeekFlags)(GST_SEEK_FLAG_FLUSH | GST_SEEK_FLAG_KEY_UNIT),seekToPos))</div>
<div class="ContentPasted0"> {</div>
<div class="ContentPasted0"> LOGW ("Seek failed!\n");</div>
<div class="ContentPasted0"> }</div>
<div class="ContentPasted0"> g_usleep(500); // just to test, no change with or without<br>
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<div class="ContentPasted0"> LOGI ("seek_to_time to %" G_GINT64_FORMAT " done\n", seekToPos);</div>
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<div class="ContentPasted0"> GstState current, pending;</div>
<div class="ContentPasted0"> GstStateChangeReturn stateChange = gst_element_get_state(customData->pipeline, ¤t, &pending, 0*GST_SECOND);</div>
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<div class="ContentPasted0"> gst_element_set_state (GST_ELEMENT (customData->pipeline), GST_STATE_PLAYING);</div>
<div class="ContentPasted0">}</div>
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<div class="ContentPasted0">With the debugger I can see that it hangs at gst_element_get_state.</div>
<div class="ContentPasted0">There it never comes back. I also did it with a timeout it didn't change anything unfortunately.</div>
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<div class="ContentPasted0">When I look into the logfile, I see that I often get the following log output:</div>
<div class="ContentPasted0">16:49:22.216 W ../gst/gstpad.c:4677:gst_pad_push_data:<ts-demuxer:audio_0_04da> Got data flow before segment event</div>
<div class="ContentPasted0">16:49:22.216 W ../gst/gstpad.c:4416:gst_pad_chain_data_unchecked:<AACqueue1:sink> Got data flow before segment event</div>
<div class="ContentPasted0">16:49:22.216 W ../gst/gstpad.c:4677:gst_pad_push_data:<AACqueue1:src> Got data flow before segment event</div>
<div class="ContentPasted0">16:49:22.216 W ../gst/gstpad.c:4416:gst_pad_chain_data_unchecked:<AACparse1:sink> Got data flow before segment event</div>
<div class="ContentPasted0">16:49:22.258 W ../gst/gstpad.c:4677:gst_pad_push_data:<ts-demuxer:video_0_04d9> Got data flow before segment event</div>
<div class="ContentPasted0">16:49:22.258 W ../gst/gstpad.c:4416:gst_pad_chain_data_unchecked:<H264queue0:sink> Got data flow before segment event</div>
<div class="ContentPasted0">16:49:22.258 W ../gst/gstpad.c:4677:gst_pad_push_data:<H264queue0:src> Got data flow before segment event</div>
<div class="ContentPasted0">16:49:22.258 W ../gst/gstpad.c:4416:gst_pad_chain_data_unchecked:<H264parse0:sink> Got data flow before segment event</div>
<div class="ContentPasted0">16:49:22.261 W ../gst/gstpad.c:4677:gst_pad_push_data:<H264parse0:src> Got data flow before segment event</div>
<div class="ContentPasted0">16:49:22.261 W ../gst/gstpad.c:4416:gst_pad_chain_data_unchecked:<H264capsfilter0:sink> Got data flow before segment event</div>
<div class="ContentPasted0">16:49:22.261 W ../gst/gstpad.c:4677:gst_pad_push_data:<H264capsfilter0:src> Got data flow before segment event</div>
<div class="ContentPasted0">16:49:22.261 W ../gst/gstpad.c:4416:gst_pad_chain_data_unchecked:<H264appsink0:sink> Got data flow before segment event</div>
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<div class="ContentPasted0 elementToProof">This one worries me, but it also sometimes occurs when there is no deadlock.</div>
<div class="ContentPasted0">Could the "Got data flow before segment event" problem have something to do with the hang?</div>
<div class="ContentPasted0">I just can't figure out the problem.</div>
<div class="ContentPasted0">Does anyone have any ideas what I can investigate further?</div>
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Regards</div>
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Patrick<br>
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