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Darren Staples

<no subject>

I’ve got my movie playing in a preview window, with an appsink element supplying buffers to my app. (thanks to your help !) :)

It may be that I can process the frame buffers faster than normal playback rate, so putting the pipeline into PLAYING mode will actually slow down my application.
What’s the best way to ensure I process each frame as fast as possible ?

The two ways I can see are:

Use a g_main_loop and set up an ‘idle’ call-back function to process each frame, using g_idle_add(). Can I then seek to the next frame from within this idle call-back function ?
Scrap the g_main_loop and use a while( !gst_app_sink_is_eos( sink )) loop.

To seek to the next frame presumably I need to do a gst_element_seek_simple() with GST_FORMAT_DEFAULT and the seek_pos set to the frame number ?

Sorry to ask so many questions...

Darren

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Wim Taymans

Re: <no subject>

On Tue, 2009-01-13 at 11:15 +0000, Darren Staples wrote:

> I’ve got my movie playing in a preview window, with an appsink element
> supplying buffers to my app. (thanks to your help !) :)
>
> It may be that I can process the frame buffers faster than normal
> playback rate, so putting the pipeline into PLAYING mode will actually
> slow down my application.
> What’s the best way to ensure I process each frame as fast as
> possible ?
>
> The two ways I can see are:
> 1. Use a g_main_loop and set up an ‘idle’ call-back function to
> process each frame, using g_idle_add(). Can I then seek to the
> next frame from within this idle call-back function ?
> 2. Scrap the g_main_loop and use a while( !
> gst_app_sink_is_eos( sink )) loop.
>
> To seek to the next frame presumably I need to do a
> gst_element_seek_simple() with GST_FORMAT_DEFAULT and the seek_pos set
> to the frame number ?
>

Set the sync property on appsink to FALSE, this will disable
synchronisation against the clock.

Wim

> Sorry to ask so many questions...
>
> Darren
>
>
>
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>
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> 633 2000) or email ([hidden email]) immediately. Thank you.
>
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