Decoding deadlock hint during seek
Michael Nazzareno Trimarchi
michael at amarulasolutions.com
Thu Jul 16 17:51:09 UTC 2020
Hi
This is more straight forward and happen using QTMultimedia and seek on mpp
Michael
On Thu, Jul 16, 2020 at 7:23 PM David Ing <ding at panopto.com> wrote:
>
> In the past, I have encountered deadlocks when a part of my pipeline has a demuxer or a tee, or basically some kind of element which "splits" a single stream into multiple streams. The outputs (source pads) of all such elements should always be attached to some kind of queue because a queue is a thread boundary.
>
> So I guess step 1 is to analyze your pipeline and make sure you have queues in the right places.
>
> If you are still stuck then sometimes you can add more queues into random spots in your pipeline to see if that fixes the problem.
>
>
> On Thu, Jul 16, 2020 at 7:16 AM Michael Nazzareno Trimarchi <michael at amarulasolutions.com> wrote:
>>
>> Hi all
>>
>> 1 __libc_do_syscall libc-do-syscall.S
>> 48 0xb4f10054
>> 2 __lll_lock_wait lowlevellock.c
>> 46 0xb4f0de42
>> 3 __GI___pthread_mutex_lock pthread_mutex_lock.c
>> 113 0xb4f088ac
>> 4 g_rec_mutex_lock gthread-posix.c
>> 308 0xb4b87120
>> 5 gst_pad_stop_task gstpad.c
>> 6301 0xaddf1d68
>> 6 gst_mpp_video_dec_sink_event gstmppvideodec.c
>> 786 0xac00e816
>> 7 gst_pad_send_event_unchecked gstpad.c
>> 5761 0xadde8aec
>> 8 gst_pad_push_event_unchecked gstpad.c
>> 5406 0xadde8fa6
>> 9 gst_pad_push_event gstpad.c
>> 5543 0xaddf0cbc
>> 10 gst_base_transform_sink_eventfunc gstbasetransform.c
>> 1910 0xadeaed82
>> 11 gst_capsfilter_sink_event gstevent.h
>> 436 0xad5547e2
>> 12 gst_pad_send_event_unchecked gstpad.c
>> 5761 0xadde8aec
>> 13 gst_pad_push_event_unchecked gstpad.c
>> 5406 0xadde8fa6
>> 14 gst_pad_push_event gstpad.c
>> 5543 0xaddf0cbc
>> 15 gst_base_parse_sink_event_default gstbaseparse.c
>> 1466 0xade96b6a
>> 16 gst_h264_parse_event gsth264parse.c
>> 2905 0xac0752d8
>> 17 gst_pad_send_event_unchecked gstpad.c
>> 5761 0xadde8aec
>> 18 gst_pad_push_event_unchecked gstpad.c
>> 5406 0xadde8fa6
>> 19 gst_pad_push_event gstpad.c
>> 5543 0xaddf0cbc
>> 20 gst_multi_queue_sink_event gstmultiqueue.c
>> 2274 0xad56cb50
>> 21 gst_pad_send_event_unchecked gstpad.c
>> 5760 0xadde88d8
>> 22 gst_pad_push_event_unchecked gstpad.c
>> 5406 0xadde8fa6
>> 23 gst_pad_push_event gstpad.c
>> 5543 0xaddf0cbc
>> 24 gst_qtdemux_push_event qtdemux.c
>> 1007 0xac98f082
>> 25 gst_qtdemux_do_seek qtdemux.c
>> 1659 0xac99efca
>> 26 gst_qtdemux_handle_src_event qtdemux.c
>> 1791 0xac99efca
>> 27 gst_pad_send_event_unchecked gstpad.c
>> 5761 0xadde8aec
>> 28 gst_pad_push_event_unchecked gstpad.c
>> 5406 0xadde8fa6
>> 29 gst_pad_push_event gstpad.c
>> 5543 0xaddf0cbc
>> 30 gst_pad_send_event_unchecked gstpad.c
>> 5761 0xadde8aec
>> 31 gst_pad_push_event_unchecked gstpad.c
>> 5406 0xadde8fa6
>> 32 gst_pad_push_event gstpad.c
>> 5543 0xaddf0cbc
>> 33 gst_base_parse_handle_seek gstevent.h
>> 436 0xade92c4e
>> 34 gst_base_parse_src_event_default gstbaseparse.c
>> 1635 0xade92c4e
>> 35 gst_h264_parse_src_event gsth264parse.c
>> 2942 0xac079b50
>> 36 gst_pad_send_event_unchecked gstpad.c
>> 5761 0xadde8aec
>> 37 gst_pad_push_event_unchecked gstpad.c
>> 5406 0xadde8fa6
>> 38 gst_pad_push_event gstpad.c
>> 5543 0xaddf0cbc
>> 39 gst_base_transform_src_eventfunc gstbasetransform.c
>> 1962 0xadeaf226
>> 40 gst_pad_send_event_unchecked gstpad.c
>> 5761 0xadde8aec
>> 41 gst_pad_push_event_unchecked gstpad.c
>> 5406 0xadde8fa6
>> 42 gst_pad_push_event gstpad.c
>> 5543 0xaddf0cbc
>> 43 gst_video_decoder_src_event_default gstvideodecoder.c
>> 1494 0xad7b9ba6
>> 44 gst_pad_send_event_unchecked gstpad.c
>> 5761 0xadde8aec
>> 45 gst_pad_push_event_unchecked gstpad.c
>> 5406 0xadde8fa6
>> 46 gst_pad_push_event gstpad.c
>> 5543 0xaddf0cbc
>> 47 event_forward_func gstevent.h
>> 436 0xaddf0f7e
>>
>> Need some help/idea how debug decoder deadlock on seek on video decoding.
>>
>> Michael
>>
>>
>> --
>> Michael Nazzareno Trimarchi
>> Amarula Solutions BV
>> COO Co-Founder
>> Cruquiuskade 47 Amsterdam 1018 AM NL
>> T. +31(0)851119172
>> M. +39(0)3479132170
>> [`as] https://www.amarulasolutions.com
>> _______________________________________________
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>> gstreamer-devel at lists.freedesktop.org
>> https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>
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--
Michael Nazzareno Trimarchi
Amarula Solutions BV
COO Co-Founder
Cruquiuskade 47 Amsterdam 1018 AM NL
T. +31(0)851119172
M. +39(0)3479132170
[`as] https://www.amarulasolutions.com
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