I'm using HTMLViewer.NSViewMBS.RenderImage(false) to capture playback of a
html5 video. Most of the time it works fine, but on occasion, it delivers a
blank frame.
The code looks like this:
// me : a HTMLViewer control
dim nsv as NSViewMBS = me.mainFrameMBS.frameView.documentView
dim ns as NSImageMBS = nsv.RenderImage(false)
p = ns.CopyPicture
ns and p are always non nil, but sometimes p is an empty picture (not showing
the movie that's playing).
I can detect this if the ns.RenderImage() command is very fast (<5msec) -
normally it takes 20-50msec.
I'm wondering if there is perhaps an error status which you can detect inside
.RenderImage() and return nil instead?
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