Embedded device and custom Gstreamer source

Duchassin Frederic duchassin at sefram.fr
Fri Feb 22 08:27:01 UTC 2019


Hello,

I try to make my own PCIE gstreamer source.

My goal is to feed an mpeg2ts stream to gstreamer pipeline on my IMX8M 
som.(kernel 4.9.88)

In order to do that, i've created my own source based on GstBaseSrc.

On many stream i get no problem....but on others my pipeline doesn't 
want to work  and it seems that MPEG2 parser is the problem.

This is the log of the failure :

    root at cl-som-imx8:/home/sefram/debug# gst-launch-1.0 pciesrc
    do-timestamp=false blocksize=4096 ! queue ! tee ! typefind !
    aiurdemux program-number=5901 name=d ! fakesink async=false
    0:00:00.409990158 13052       0x7f72d0 LOG aiurdemux
    aiurdemux.c:478:gst_aiurdemux_init:<GstAiurDemux at 0x8202e0>
    gst_aiurdemux_init
    Setting pipeline to PAUSED ...
    0:00:00.413664153 13052       0x7f72d0 LOG aiurdemux
    aiurdemux.c:519:gst_aiurdemux_change_state:<d> change_state transition=a
    0:00:00.413973989 13052       0x7f72d0 DEBUG aiurdemux
    aiurdemux.c:508:gst_aiurdemux_change_state:<d> change_state
    READY_TO_PAUSED
    0:00:00.414040469 13052       0x7f72d0 LOG aiurdemux
    aiurdemux.c:894:aiurdemux_sink_activate:<d:sink> activating push
    Pipeline is live and does not need PREROLL ...
    Setting pipeline to PLAYING ...
    0:00:00.416130963 13052       0x7f72d0 LOG aiurdemux
    aiurdemux.c:519:gst_aiurdemux_change_state:<d> change_state
    transition=1c
    New clock: GstSystemClock
    0:00:00.417412908 13052       0x8124a0 LOG aiurdemux
    aiurdemux.c:669:gst_aiurdemux_handle_sink_event:<d>
    gst_aiurdemux_handle_sink_event event=280e
    0:00:00.434010267 13052       0x8124a0 DEBUG aiurdemux
    aiurdemux.c:1082:gst_aiurdemux_setcaps:<d>
    gst_aiurdemux_setcaps=video/mpegts, systemstream=(boolean)true,
    packetsize=(int)188

    ====== AIUR: 4.3.5 build on Jan 21 2019 17:47:10. ======
             Core: BLN_MAD-MMLAYER_MPG2PARSER_04.05.16  build on Sep 14
    2017 02:37:53
      file: /usr/lib/imx-mm/parser/lib_mpg2_parser_arm_elinux.so.3.1
    0:00:00.434538141 13052       0x8124a0 INFO aiurdemux
    aiurdemux.c:1094:gst_aiurdemux_setcaps:<d> Container: MPEG
    0:00:00.434606900 13052       0x8124a0 DEBUG aiurdemux
    aiurdemux.c:596:gst_aiurdemux_handle_sink_event:<d> handling new
    segment from0
    0:00:00.571159247 13052       0x812280 LOG aiurdemux
    aiurdemux.c:1197:aiurdemux_loop_state_init:<d>
    aiurdemux_loop_state_init SUCCESS
    0:00:00.571239646 13052       0x812280 DEBUG aiurdemux
    aiurdemux.c:1518:aiurdemux_set_readmode:<d> read mode = track mode
    0:00:00.571300125 13052       0x812280 LOG aiurdemux
    aiurdemux.c:1979:aiurdemux_parse_streams:<d> aiurdemux_parse_streams
    ret=0
    0:00:00.571578522 13052       0x812280 LOG aiurdemux
    aiurdemux.c:1308:aiurdemux_loop_state_header:<d>
    aiurdemux_loop_state_header SUCCESS
    0:00:00.571616321 13052       0x812280 LOG aiurdemux
    aiurdemux.c:1313:aiurdemux_loop_state_header:<d>
    aiurdemux_loop_state_header FAILED
    0:00:00.571648601 13052       0x812280 LOG aiurdemux
    aiurdemux.c:1061:aiurdemux_push_task:<d> pausing task, reason error

    0:00:00.571694320 13052       0x812280 WARN aiurdemux
    aiurdemux.c:1068:aiurdemux_push_task:<d> error: streaming stopped,
    reason error, state 2
    WARNING: from element /GstPipeline:pipeline0/GstAiurDemux:d: Delayed
    linking failed.
    Additional debug info:
    ../../../git/gst/parse/grammar.y(510): gst_parse_no_more_pads ():
    /GstPipeline:pipeline0/GstAiurDemux:d:
    failed delayed linking some pad of GstAiurDemux named d to some pad
    of GstFakeSink named fakesink0
    ERROR: from element /GstPipeline:pipeline0/GstAiurDemux:d: GStreamer
    encountered a general stream error.
    Additional debug info:
    ../../../git/plugins/aiurdemux/aiurdemux.c(1068):
    aiurdemux_push_task (): /GstPipeline:pipeline0/GstAiurDemux:d:
    streaming stopped, reason error, state 2
    Execution ended after 0:00:00.155683236
    Setting pipeline to PAUSED ...
    0:00:00.572143715 13052       0x7f72d0 LOG aiurdemux
    aiurdemux.c:519:gst_aiurdemux_change_state:<d> change_state
    transition=23
    Setting pipeline to READY ...
    0:00:00.572622629 13052       0x7f72d0 LOG aiurdemux
    aiurdemux.c:519:gst_aiurdemux_change_state:<d> change_state
    transition=1a
    0:00:01.571911494 13052       0x7f72d0 DEBUG aiurdemux
    aiurdemux.c:528:gst_aiurdemux_change_state:<d> change_state
    PAUSED_TO_READY
    Setting pipeline to NULL ...
    0:00:01.573297478 13052       0x7f72d0 LOG aiurdemux
    aiurdemux.c:519:gst_aiurdemux_change_state:<d> change_state
    transition=11
    Freeing pipeline ...
    0:00:01.573816591 13052       0x7f72d0 LOG aiurdemux
    aiurdemux.c:486:gst_aiurdemux_finalize:<d> gst_aiurdemux_finalize

I've recorder this stream . On this stream only program 5902 is working. 
Others programs gives errors.

I just add that reading this file with "filesrc" gives no error on every 
programs *(it just do many seek before decoding*):

    root at cl-som-imx8:/home/sefram/debug# gst-launch-1.0 filesrc
    location=/home/sefram/TS/essai.ts ! queue ! tee ! typefind !
    aiurdemux program-number=5901 name=d ! fakesink
    0:00:00.083554268 13082       0x66e460 LOG aiurdemux
    aiurdemux.c:478:gst_aiurdemux_init:<GstAiurDemux at 0x670270>
    gst_aiurdemux_init
    Setting pipeline to PAUSED ...
    0:00:00.086178037 13082       0x66e460 LOG aiurdemux
    aiurdemux.c:519:gst_aiurdemux_change_state:<d> change_state transition=a
    0:00:00.086412994 13082       0x66e460 DEBUG aiurdemux
    aiurdemux.c:508:gst_aiurdemux_change_state:<d> change_state
    READY_TO_PAUSED
    0:00:00.086458473 13082       0x66e460 LOG aiurdemux
    aiurdemux.c:894:aiurdemux_sink_activate:<d:sink> activating push
    Pipeline is PREROLLING ...
    0:00:00.093662346 13082       0x654cf0 LOG aiurdemux
    aiurdemux.c:669:gst_aiurdemux_handle_sink_event:<d>
    gst_aiurdemux_handle_sink_event event=280e
    0:00:00.108879842 13082       0x654cf0 DEBUG aiurdemux
    aiurdemux.c:1082:gst_aiurdemux_setcaps:<d>
    gst_aiurdemux_setcaps=video/mpegts, systemstream=(boolean)true,
    packetsize=(int)188

    ====== AIUR: 4.3.5 build on Jan 21 2019 17:47:10. ======
             Core: BLN_MAD-MMLAYER_MPG2PARSER_04.05.16  build on Sep 14
    2017 02:37:53
      file: /usr/lib/imx-mm/parser/lib_mpg2_parser_arm_elinux.so.3.1
    0:00:00.109289877 13082       0x654cf0 INFO aiurdemux
    aiurdemux.c:1094:gst_aiurdemux_setcaps:<d> Container: MPEG
    0:00:00.109348556 13082       0x654cf0 DEBUG aiurdemux
    aiurdemux.c:608:gst_aiurdemux_handle_sink_event:<d> Pushing newseg 
    rate 1, format 3, start 0:00:00.000000000, stop 99:99:99.999999999
    0:00:00.109487395 13082       0x654a30 DEBUG aiurdemux
    aiurcontent.c:576:aiurcontent_query_content_info: can not mkdir
    /home/root/.aiur
    0:00:00.132204560 13082       0x654a30 DEBUG aiurdemux
    aiurcontent.c:351:aiurcontent_callback_seek_push: seek to 0
    0:00:00.132278479 13082       0x654a30 DEBUG aiurdemux
    aiurstreamcache.c:340:gst_aiur_stream_cache_seek: Flush cache,
    backward seek addr 0, cachestart 2814646, offset 200010
    0:00:00.132311118 13082       0x654a30 INFO aiurdemux
    aiurstreamcache.c:365:gst_aiur_stream_cache_seek: stream cache try
    seek to 0
    0:00:01.133119765 13082       0x654cf0 DEBUG aiurdemux
    aiurdemux.c:608:gst_aiurdemux_handle_sink_event:<d> Pushing newseg 
    rate 1, format 3, start 0:00:00.000000000, stop 99:99:99.999999999
    0:00:01.179763321 13082       0x654a30 DEBUG aiurdemux
    aiurcontent.c:351:aiurcontent_callback_seek_push: seek to 0
    0:00:01.179851879 13082       0x654a30 DEBUG aiurdemux
    aiurstreamcache.c:340:gst_aiur_stream_cache_seek: Flush cache,
    backward seek addr 0, cachestart 3666614, offset 200010
    0:00:01.179895199 13082       0x654a30 INFO aiurdemux
    aiurstreamcache.c:365:gst_aiur_stream_cache_seek: stream cache try
    seek to 0
    0:00:02.180303771 13082       0x654cf0 DEBUG aiurdemux
    aiurdemux.c:608:gst_aiurdemux_handle_sink_event:<d> Pushing newseg 
    rate 1, format 3, start 0:00:00.000000000, stop 99:99:99.999999999
    0:00:02.182863220 13082       0x654a30 DEBUG aiurdemux
    aiurcontent.c:351:aiurcontent_callback_seek_push: seek to 130314240
    0:00:02.182958379 13082       0x654a30 INFO aiurdemux
    aiurstreamcache.c:365:gst_aiur_stream_cache_seek: stream cache try
    seek to 130314240
    0:00:02.183825128 13082       0x654cf0 DEBUG aiurdemux
    aiurdemux.c:608:gst_aiurdemux_handle_sink_event:<d> Pushing newseg 
    rate 1, format 3, start 0:00:00.130314240, stop 99:99:99.999999999
    0:00:02.185594987 13082       0x654a30 DEBUG aiurdemux
    aiurcontent.c:351:aiurcontent_callback_seek_push: seek to 130052096
    0:00:02.185642026 13082       0x654a30 DEBUG aiurdemux
    aiurstreamcache.c:340:gst_aiur_stream_cache_seek: Flush cache,
    backward seek addr 130052096, cachestart 130314240, offset 131072
    0:00:02.185683666 13082       0x654a30 INFO aiurdemux
    aiurstreamcache.c:365:gst_aiur_stream_cache_seek: stream cache try
    seek to 130052096
    0:00:02.186139900 13082       0x654cf0 DEBUG aiurdemux
    aiurdemux.c:608:gst_aiurdemux_handle_sink_event:<d> Pushing newseg 
    rate 1, format 3, start 0:00:00.130052096, stop 99:99:99.999999999
    0:00:02.192078748 13082       0x654a30 DEBUG aiurdemux
    aiurcontent.c:351:aiurcontent_callback_seek_push: seek to 0
    0:00:02.192145227 13082       0x654a30 DEBUG aiurdemux
    aiurstreamcache.c:340:gst_aiur_stream_cache_seek: Flush cache,
    backward seek addr 0, cachestart

I hope somebody could help me because i don't really understand the 
problem. My custom plugin should be bad...I can send my source code if 
someone can look at it.

BR

Frédéric

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