hook up new device as src, uri, or something else ?

[George and Candy Koharchik]

Hi folks,

 

  I’m looking for some suggestions for hooking up a new device. I’m on linux running version 1.10, but 1.14 is okay too.

 

  The device delivers YUV pixels to memory. I can grab them from  memory mapped buffers. I’d like to plug them into the gstreamer software, but I’m not sure where.

 

  I started with the source for videotestsrc, but I need something more than just a handful of colors. Next I thought v4l2src, but I don’t need something that does all the v4l2 driver protocol. Something closer to filesrc, but live, non-seekable. I just need to grab pixels from memory (that memory mapped buffer), and put them out as video. I tried gst-plugins-bad/tools/gst-element-maker with a couple of the entries in element-templates, but got confusing results. I think I want something that generates output like videotestsrc does.   Using “gst-element-maker mytest video-encoder” looks promising, but the example launch line generated shows “fakesrc ! mytest ! …” . I don’t think I want something pushing buffers in. Or do I need to write a uri that tells the rest of the infrastructure how to talk to the memory mapped buffers instead?

 

Thanks,

 

blueshirt

 

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

[Mandar Joshi]

>   The device delivers YUV pixels to memory. I can grab them from  memory mapped buffers. I’d like to plug them into the gstreamer software, but I’m not sure where.
>
>   I started with the source for videotestsrc, but I need something more than just a handful of colors.
>   Next I thought v4l2src, but I don’t need something that does all the v4l2 driver protocol. Something
>  closer to filesrc, but live, non-seekable. I just need to grab pixels from memory (that memory mapped
>  buffer), and put them out as video.

You could try writing a bin. It's simpler.
You can refer to my youtubebin https://github.com/mndar/gstyoutubebin
which allows you to use the youtube-dl script in a GStreamer pipeline.

Regards
Mandar Joshi
Czar Softech
_______________________________________________
gstreamer-devel mailing list
[hidden email]
https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel

[George and Candy Koharchik]

Thanks Mandar: I'll give it a try!

blueshirt

------------------------------

Message: 2
Date: Sun, 26 Aug 2018 10:22:59 +0530
From: Mandar Joshi <[hidden email]>
To: Discussion of the development of and with GStreamer
        <[hidden email]>
Subject: Re: hook up new device as src, uri, or something else ?
Message-ID:
        <[hidden email]>
Content-Type: text/plain; charset="UTF-8"

>   The device delivers YUV pixels to memory. I can grab them from  memory mapped buffers. I’d like to plug them into the gstreamer software, but I’m not sure where.
>
>   I started with the source for videotestsrc, but I need something more than just a handful of colors.
>   Next I thought v4l2src, but I don’t need something that does all the
> v4l2 driver protocol. Something  closer to filesrc, but live,
> non-seekable. I just need to grab pixels from memory (that memory mapped  buffer), and put them out as video.

You could try writing a bin. It's simpler.
You can refer to my youtubebin https://github.com/mndar/gstyoutubebin
which allows you to use the youtube-dl script in a GStreamer pipeline.

Regards
Mandar Joshi
Czar Softech


------------------------------



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