How to temporarily disable drawing in the directdrawsink?

[wl2776]

Is it possible to have a frozen frame on the screen, while the pipeline is playing?

I am using playbin2 and directdrawsink as the video sink.

[dhoyt]

It's entirely possible if there was a bug in directdrawsink that caused incoming frames to be discarded or not drawn. I'm not sure about directdraw, but in direct3d if you've lost the d3d device object (due to another app going to fullscreen, a UAC prompt, etc.), then incoming frames won't be drawn until you reset the device and redraw. Directdraw may have something similar.

When do you notice this happening? And can you reproduce it reliably and consistently?

Just FYI -- the direct3d video sink in the ossbuild repo. correctly handles these scenarios.

-----Original Message-----
From: wl2776 [mailto:[hidden email]]
Sent: Tuesday, August 03, 2010 5:05 AM
To: [hidden email]
Subject: [gst-devel] How to temporarily disable drawing in the directdrawsink?


Is it possible to have a frozen frame on the screen, while the pipeline is
playing?

I am using playbin2 and directdrawsink as the video sink.
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[Andoni Morales]

2010/8/3 Hoyt, David <[hidden email]>:
> It's entirely possible if there was a bug in directdrawsink that caused incoming frames to be discarded or not drawn. I'm not sure about directdraw, but in direct3d if you've lost the d3d device object (due to another app going to fullscreen, a UAC prompt, etc.), then incoming frames won't be drawn until you reset the device and redraw. Directdraw may have something similar.
>
> When do you notice this happening? And can you reproduce it reliably and consistently?

I think he his asking "how", and not "why" :P

The approach might vary depending on the pipeline you are using, but
usually setting the element to the paused state, locking its state and
unplugging it will do the job.

Andoni

>
> Just FYI -- the direct3d video sink in the ossbuild repo. correctly handles these scenarios.
>
> -----Original Message-----
> From: wl2776 [mailto:[hidden email]]
> Sent: Tuesday, August 03, 2010 5:05 AM
> To: [hidden email]
> Subject: [gst-devel] How to temporarily disable drawing in the directdrawsink?
>
>
> Is it possible to have a frozen frame on the screen, while the pipeline is
> playing?
>
> I am using playbin2 and directdrawsink as the video sink.
> --
> View this message in context: http://*gstreamer-devel.966125.n4.nabble.com/How-to-temporarily-disable-drawing-in-the-directdrawsink-tp2311736p2311736.html
> Sent from the GStreamer-devel mailing list archive at Nabble.com.
>
> ------------------------------------------------------------------------------
> The Palm PDK Hot Apps Program offers developers who use the
> Plug-In Development Kit to bring their C/C++ apps to Palm for a share
> of $1 Million in cash or HP Products. Visit us here for more details:
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--
Andoni Morales Alastruey

LongoMatch:The Digital Coach
http://www.longomatch.ylatuya.es

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[wl2776]

dhoyt wrote

When do you notice this happening? And can you reproduce it reliably and consistently?

This is not happening, unfortunately.

I'm struggling with the reverse framestepping.
It isn't stable, I cannot fix it, and was going to replace or supplement it with jumping backwards and stepping forward.
Ugly, I know...

[wl2776]

Andoni Morales wrote

The approach might vary depending on the pipeline you are using, but
usually setting the element to the paused state, locking its state and
unplugging it will do the job.

I'm using playbin2.
How can I lock the state? I see only gst_element_set_state().

[Tiago Katcipis]

On Wed, Aug 4, 2010 at 3:57 AM, wl2776 <[hidden email]> wrote:

Andoni Morales wrote:
>
> The approach might vary depending on the pipeline you are using, but
> usually setting the element to the paused state, locking its state and
> unplugging it will do the job.
>

I'm using playbin2.
How can I lock the state? I see only gst_element_set_state().

You are looking for this? :-)

http://www.gstreamer.net/data/doc/gstreamer/head/gstreamer/html/GstElement.html#gst-element-set-locked-state

Best regards,
Katcipis
 

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