AW: [External] Re: vaapipostproc + colorbalance not working properly

[Timtchenko, Michael]

Created an issue as recommended. The requested files are attached.

#182

Thx 4 reply :)

-----Ursprüngliche Nachricht-----
Von: gstreamer-devel [mailto:gstreamer-devel-bounces at lists.freedesktop.org] Im Auftrag von Víctor Jáquez
Gesendet: Dienstag, 16. Juli 2019 10:41
An: Discussion of the development of and with GStreamer <gstreamer-devel at lists.freedesktop.org>
Betreff: [External] Re: vaapipostproc + colorbalance not working properly

On Tue, 16 Jul 2019 at 08:14, Timtchenko, Michael wrote:
> Hi all,
>
> i'm facing an issue related to gstreamers module "vaapipostproc" in
> version 1.14.4. I'm trying to adjust the colorbalance of a video
> stream by setting the following properties
>
>
> -          saturation
>
> -          contrast
>
> -          brightness
>
> while active streaming.
>
> I'm doing this by setting the following properties:
>
> g_object_set( G_OBJECT( vaapipostproc ), "saturation", saturation,
> NULL ); g_object_set( G_OBJECT( vaapipostproc ), "contrast", contrast,
> NULL ); g_object_set( G_OBJECT( vaapipostproc ), "brightness",
> brightness, NULL );
>
> whereas saturation, contrast and brightness are properly initialized gfloat variables.
>
> It seems that there is a domination order contrast > brightness > saturation.
>
> I'll explain this shortly:
>
> Case I:
>
> 1.       Setting saturation to maximum -> Image is properly adjusted
>
> 2.       Minimal reduction of brightness -> Saturation of image is reset
>
> 3.       Resetting brightness to default value -> Image has again the saturation of (1)
>
> Case II:
>
> 1.       Setting brightness to maximum -> Image is properly adjusted
>
> 2.       Minimal reduction of contrast -> Brightness of image is reset
>
> 3.       Resetting contrast to default value -> Image has again the brightness of (1)
>
> Case III:
>
> 1.       Setting saturation to maximum -> Image is properly adjusted
>
> 2.       Minimal reduction of contrast -> Saturation of the image is reset
>
> 3.       Resetting the contrast to default value -> Image has again the saturation of (1)
>
>
> I've checked this behavior by setting the property values programmatically in code and also by setting up the pipeline with the corresponding values up front.
>
> Am I doing wrong, or is there a bug in the module "vaapipostproc"?

It smells like a bug. But before, what backend are you using? can you share your test app? and finally, can you share a GST_DEBUG=vaapipostproc:5 log?

You can open an issue in gitlab and upload those files :)

Thanks

vmjl
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