help:cairooverlay on win32 makes high cpu usage

[方明]

hi everyone

       

   I developed a element ,which work like textoverlay but use cairo to draw

line or rect on a surface .

then call gst_video_overlay_composition_add_rectangle to video buffer(N times)

and then call gst_video_overlay_composition_blend. 

lastly push to dshowvideosink(I am working in win32).

It can work,but result in high cpu usage.

how can I improve its performace ?

Thanks.

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[Nicolas Dufresne-5]

Le 1 juil. 2017 6:58 AM, "方明" <[hidden email]> a écrit :

hi everyone

       

   I developed a element ,which work like textoverlay but use cairo to draw

line or rect on a surface .

Textoverlay also uses Cairo to draw the glyph, just to clarify.

then call gst_video_overlay_composition_add_rectangle to video buffer(N times)

and then call gst_video_overlay_composition_blend. 

lastly push to dshowvideosink(I am working in win32).

It can work,but result in high cpu usage.

how can I improve its performace ?

You should use a profiler to identify the bottleneck. Then it will be easier to know what need to be optimized. It's possible that adding CompositionMeta support to dshowviseosink is what you want.

Thanks.

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