Decoding deadlock hint during seek
Michael Nazzareno Trimarchi
michael at amarulasolutions.com
Thu Jul 16 18:01:44 UTC 2020
Hi
>From the stacktrace look like that I'm here
GST_PAD_STREAM_LOCK (pad); <----- pad is already locked
GST_PAD_STREAM_UNLOCK (pad);
Can someone explain me this code?
On Thu, Jul 16, 2020 at 7:51 PM Michael Nazzareno Trimarchi
<michael at amarulasolutions.com> wrote:
>
> 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
> >> _______________________________________________
> >> gstreamer-devel mailing list
> >> gstreamer-devel at lists.freedesktop.org
> >> https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
> >
> > _______________________________________________
> > gstreamer-devel mailing list
> > gstreamer-devel at lists.freedesktop.org
> > https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>
>
>
> --
> 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
--
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
More information about the gstreamer-devel
mailing list