AW: Re: dynamic videomixing

[bernhard.graaf]

Sorry, misunderstandig, will try and give you a response

<div>-------- Ursprüngliche Nachricht --------</div><div>Von: Sérgio Agostinho <sergio.r.agostinho at gmail.com> </div><div>Datum:15.12.2014  15:20  (GMT+01:00) </div><div>An: Discussion of the development of and with GStreamer <gstreamer-devel at lists.freedesktop.org> </div><div>Betreff: Re: dynamic videomixing </div><div>
</div>Wasn't your problem solved by adding a videoscale element before the videomixer?

2014-12-15 15:14 GMT+01:00 Bernhard Graaf <bernhard.graaf at gmx.de>:
Hi Sèrgio,

 

any results?

 

Bernhard

 

Von: gstreamer-devel [mailto:gstreamer-devel-bounces at lists.freedesktop.org] Im Auftrag von Bernhard Graaf
Gesendet: Samstag, 13. Dezember 2014 19:54
An: 'Discussion of the development of and with GStreamer'
Betreff: AW: dynamic videomixing

 

Thanks a lot!!!

 

Von: gstreamer-devel [mailto:gstreamer-devel-bounces at lists.freedesktop.org] Im Auftrag von Sérgio Agostinho
Gesendet: Samstag, 13. Dezember 2014 19:48
An: Discussion of the development of and with GStreamer
Betreff: Re: dynamic videomixing

 

Gave it some more tests and apparently the issue is with the pixel-aspect-ratio=64/45. The videomixer does not like it. I managed to work around it by adding a videoscale element before the the videomixer. 

 

gst-launch-1.0 -ve videotestsrc ! video/x-raw, format=I420, width=720, height=576, pixel-aspect-ratio=64/45, interlace-mode=mixed, chroma-site=mpeg2, colorimetry=bt601, framerate=25/1 ! videoscale ! videomixer ! xvimagesink

 

 

2014-12-13 19:34 GMT+01:00 Bernhard Graaf <bernhard.graaf at gmx.de>:

Absolute the same result.

 

Von: gstreamer-devel [mailto:gstreamer-devel-bounces at lists.freedesktop.org] Im Auftrag von Sérgio Agostinho
Gesendet: Samstag, 13. Dezember 2014 19:18


An: Discussion of the development of and with GStreamer
Betreff: Re: dynamic videomixing

 

It is clear that you're having a format issue when you're adding the videomixer.  What happens if you place a deinterlace element before the videomixer?

 

2014-12-13 18:46 GMT+01:00 Bernhard Graaf <bernhard.graaf at gmx.de>:

See attached files

 

Von: gstreamer-devel [mailto:gstreamer-devel-bounces at lists.freedesktop.org] Im Auftrag von Sérgio Agostinho
Gesendet: Samstag, 13. Dezember 2014 18:23


An: Discussion of the development of and with GStreamer
Betreff: Re: dynamic videomixing

 

Paste the console output of your pipeline


gst-launch-1.0 -v tcpclientsrc host='192.168.1.4' port=12000 ! queue2 ! decodebin name=decoder decoder. ! queue ! audioconvert ! audioresample ! pulsesink   decoder. !  queue ! videoconvert ! xvimagesink

and also with the videomixer

 

gst-launch-1.0 -v tcpclientsrc host='192.168.1.4' port=12000 ! queue2 ! decodebin name=decoder decoder. ! queue ! audioconvert ! audioresample ! pulsesink   decoder. !  queue ! videoconvert ! videomixer ! xvimagesink

 

 

 

2014-12-13 18:12 GMT+01:00 Bernhard Graaf <bernhard.graaf at gmx.de>:

Hi Sèrgio,

 

I have checked this. If I try to test the pipeline with gst-launch, I get the same result (whatever position, before queue, after queue, after videoconvert).

gst-launch-1.0 -vvv tcpclientsrc host='192.168.1.4' port=12000 ! queue2 ! decodebin name=decoder decoder. ! queue ! audioconvert ! audioresample ! pulsesink   decoder. !  queue ! videoconvert ! xvimagesink

The pipeline is hanging. If I remove only the videomixer, the pipeline is working well.

The gst_pad_link() returned ‘GST_PAD_LINK_NOFORMAT’.

 

Any Idea?

 

Bernhard

Von: gstreamer-devel [mailto:gstreamer-devel-bounces at lists.freedesktop.org] Im Auftrag von Sérgio Agostinho
Gesendet: Samstag, 13. Dezember 2014 16:38
An: Discussion of the development of and with GStreamer
Betreff: Re: dynamic videomixing

 

Hi Bernhard, 

 

I've tested the pipeline below and it works so the answer to your initial question is, yes you can have only one sink pad in the video mixer

gst-launch-1.0 -ev v4l2src ! videomixer ! xvimagesink

 

Regarding the second question. 

gst_pad_link() returns the reason why the link failed, and it is normally quite descriptive as you can see on 

http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstPad.html#GstPadLinkReturn . Try to see what it is returning in your case.

 

Also have you tried to test your pipeline in gst-launch with the video mixer?

 

Sérgio


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