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Added camera image encoder control that
1. applies image encoder settings (resolution and codec) used to capture images
2. returns supported image codecs from
QImageWriter::supportedImageFormats
3. returns supported resolutions
Since DirectShow camera session uses QImage based on QVideoFrame
image encoder control returns viewfinder supported resolutions.
Not available if camera is not loaded.
Setting resolution via encoder control causes viewfinder resolution to be ignored.
Task-number: QTBUG-32743
Change-Id: I1de3ca9c6543937cb62f73cb64a81d23b0d5c4c9
Reviewed-by: Oliver Wolff <oliver.wolff@qt.io>
Reviewed-by: Andy Shaw <andy.shaw@qt.io>
Reviewed-by: Christian Stromme <christian.stromme@qt.io>
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