adding pad names to pipe

[William]

My understanding is that when you use gst-launch-1.0 you can give the
element name or the element name and the pad name. For example, if I
have an element called "ximagesink" with a pad call "sink" I can link it
up like this: ximagesink.sink.  However, I have been having a hard time
getting this to work.

This works:

gst-launch-1.0 filesrc location=/home/wgj/video/Truck.H264.ts ! tsdemux
! h264parse ! avdec_h264 ! videoconvert ! ximagesink

But this does not:

gst-launch-1.0 filesrc location=/home/wgj/video/Truck.H264.ts ! tsdemux
! h264parse ! avdec_h264 ! videoconvert ! ximagesink.sink

it gives:

WARNING: erroneous pipeline: No sink-element named "(null)" - omitting link

Should it have worked or do I not understand something?

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[yair]

for you example, ximagesink.sink will not work, 

it will work just fine without the .sink running in gst-launch. 

or use ximagesink0 (default generated name) 

there is only one sink out of xvimagesink and gst-launch is aware of that. 

elements have names, or get one automagicly (usually elemnt_named+0). 

you can see them if you add -v verbose flag. or you can be explicit. like in the following pad example . 

https://gstreamer.freedesktop.org/documentation/tutorials/basic/gstreamer-tools.html#pads 

 

pads have names as well, like tee0.video_0, tee0.video_1

  tee is the name of the element, and video_0 is the name of the pad.   

or you can be explicit like ! tee name=mytee !

then it will be like 

mytee=video_0

TIP, try to supply a generic gst-launch that uses videotestsrc or friends. so we can run it straight without guesswork.   

On Thu, Apr 23, 2020 at 5:12 AM William Johnston <[hidden email]> wrote:

My understanding is that when you use gst-launch-1.0 you can give the
element name or the element name and the pad name. For example, if I
have an element called "ximagesink" with a pad call "sink" I can link it
up like this: ximagesink.sink.  However, I have been having a hard time
getting this to work.

This works:

gst-launch-1.0 filesrc location=/home/wgj/video/Truck.H264.ts ! tsdemux
! h264parse ! avdec_h264 ! videoconvert ! ximagesink

But this does not:

gst-launch-1.0 filesrc location=/home/wgj/video/Truck.H264.ts ! tsdemux
! h264parse ! avdec_h264 ! videoconvert ! ximagesink.sink

it gives:

WARNING: erroneous pipeline: No sink-element named "(null)" - omitting link

Should it have worked or do I not understand something?

_______________________________________________
gstreamer-devel mailing list
[hidden email]
https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel

_______________________________________________
gstreamer-devel mailing list
[hidden email]
https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel