Basic tutorial 10: GStreamer tools Goal. GStreamer comes with a set of tools which range from handy to absolutely essential. There is no code in this tutorial, just sit back and relax, and we will teach you:
The problem is that all variations of this that I try give a "Delayed linking failed" error - here is an example:
Setting pipeline to PAUSED ...[68219.713998] omap-iommu 55082000.mmu: 55082000.mmu: version 2.1 Pipeline is PREROLLING ...
WARNING: from element /GstPipeline:pipeline0/GstMatroskaDemux:d: Delayed linking failed.
Additional debug info:
../../../gstreamer-1.12.2/gst/parse/grammar.y(510): gst_parse_no_more_pads (): /GstPipeline:pipeline0/GstMatroskaDemux:d:
failed delayed linking pad video_00 of GstMatroskaDemux named d to some pad of GstQueue named queue0
ERROR: from element /GstPipeline:pipeline0/GstMatroskaDemux:d: Internal data stream error.
Additional debug info:
../../../gst-plugins-good-1.12.2/gst/matroska/matroska-demux.c(4799): gst_matroska_demux_loop (): /GstPipeline:pipeline0/GstMatroskaDemux:d:
streaming stopped, reason not-linked (-1)
ERROR: pipeline doesn't want to preroll.
Setting pipeline to NULL ...
Freeing pipeline ...
How can I extract one video stream from the matroska file? Thanks.
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Re: Extract 1 Video Channel from H.264 encoded multi-stream Matroska File
On Fri, 2018-10-05 at 12:45 +0000, Class, Phil wrote:
> I am trying to use the pipeline:
> gst-launch-1.0 filesrc location=test-video.mkv ! matroskademux name=d
> d.video_00 ! queue ! video/x-h264 ! queue ! h264parse ! ducatih264dec
> ! waylandsink sync=false
> The problem is that all variations of this that I try give a "Delayed
> linking failed" error
Try using d.video_0 and d.video_1 instead of d.video_00.
The exact name varies a bit from demuxer to demuxer, but gst-inspect-
1.0 matroskademux shows that the pad template name is "video_%u" rather
than "video_%02u" so I would expect the video pad to be named "video_0"