dash input no more pads

[Rand Graham]

Hello,

Can anyone help with this issue?

In general, why does no more pads error happen? I have seen it more than once and it is a confusing error message each time.

Thanks,
Rand

From: gstreamer-devel [mailto:gstreamer-devel-bounces at lists.freedesktop.org] On Behalf Of Nicolas Dufresne
Sent: Thursday, November 30, 2017 6:00 PM
To: Discussion of the development of and with GStreamer <gstreamer-devel at lists.freedesktop.org>
Subject: Re: dash input no more pads



Le 30 nov. 2017 4:44 PM, "Rand Graham" <rand.graham at lge.com<mailto:rand.graham at lge.com>> a écrit :
Hello,

I am trying to playback a DASH input using a command line pipeline. I am getting a no more pads error. Can someone explain what is going wrong?

It says it failed linking qtdemux to h265parse, probably that you also have audio. The parse_launch does not generate smart code, try using playbin instead, it's specially designed to handle complex cases like dash.

As far as I can tell, the file has a quick time container with both audio and video. I am just trying to playback the video with my pipeline.

This stream plays back when using playbin.

My pipeline and the errors I see:

gst-launch-1.0 souphttpsrc location="http://localhost:8100/streams/0/manifest.mpd" ! dashdemux ! qtdemux ! h265parse ! mfxhevcdec ! fpsdisplaysink video-sink=mfxsink
Setting pipeline to PAUSED ...
libva info: VA-API version 0.99.0
libva info: va_getDriverName() returns 0
libva info: User requested driver 'iHD'
libva info: Trying to open /opt/intel/mediasdk/lib64/iHD_drv_video.so
libva info: Found init function __vaDriverInit_0_32
libva info: va_openDriver() returns 0
Pipeline is PREROLLING ...
Got context from element 'mfxsink0': gst.mfx.Aggregator=context, gst.mfx.Aggregator=(GstMfxTaskAggregator)NULL;
WARNING: from element /GstPipeline:pipeline0/GstQTDemux:qtdemux0: Delayed linking failed.
Additional debug info:
./grammar.y(506): gst_parse_no_more_pads (): /GstPipeline:pipeline0/GstQTDemux:qtdemux0:
failed delayed linking some pad of GstQTDemux named qtdemux0 to some pad of GstH265Parse named h265parse0
ERROR: from element /GstPipeline:pipeline0/GstDashDemux:dashdemux0: Internal data stream error.
Additional debug info:
gstadaptivedemux.c(2976): gst_adaptive_demux_stream_download_loop (): /GstPipeline:pipeline0/GstDashDemux:dashdemux0:
stream stopped, reason not-linked
ERROR: pipeline doesn't want to preroll.
Setting pipeline to NULL ...
Freeing pipeline ..

Output of gst-discoverer:

gst-discoverer-1.0 http://localhost:8100/streams/0/manifest.mpd
Analyzing http://localhost:8100/streams/0/manifest.mpd
Done discovering http://localhost:8100/streams/0/manifest.mpd

Topology:
  container: application/dash+xml
    container: MPEG-4 AAC
      audio: MPEG-4 AAC
    container: Quicktime
      video: H.265 (Main 10 Profile)

Properties:
  Duration: 1461:20:43.624687400
  Seekable: yes
  Tags:
      audio codec: MPEG-4 AAC audio
      maximum bitrate: 161152
      bitrate: 157368
      container format: ISO fMP4
      nominal bitrate: 4294967295
      video codec: H.265 / HEVC


Thanks,
Rand

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