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compositor: Always draw if all input buffers are GAP

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Otherwise output buffers will contain random scene
(previously rendered or arbitrary initial values) since we don't
draw onto output buffer at all.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1498>
This commit is contained in:
Seungha Yang 2022-01-07 18:25:00 +09:00 committed by GStreamer Marge Bot
parent a13309be4a
commit e37bbc054e
1 changed files with 5 additions and 0 deletions
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5
subprojects/gst-plugins-base/gst/compositor/compositor.c
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@ -1383,6 +1383,11 @@ gst_compositor_aggregate_frames (GstVideoAggregator * vagg, GstBuffer * outbuf)
n_pads++;
}
/* If no prepared frame, we should draw background unconditionally in order
* to clear output buffer */
if (n_pads == 0)
draw_background = TRUE;
pads_info = g_newa (struct CompositePadInfo, n_pads);
n_pads = 0;