Hi Boris,
thank you for your thoughts, I have to use latest CanonSDK and NikonSDK
because our customers use latest cameras hardware from the two companies
and also we need to have raw support (raw*, cr2* and nef*)
Sadly, me too I haven't found any option to receive the supported
exposure compensation and other parameters values in the Qt front-end
classes, in order to implement them in the plug-in interface
I only see supported apertures, iso and shutter speed ...
Also we don't use QML :-), so the QML part is not so important right now.
Regards,
Marius
On 8/1/2014 3:53 PM, Boris Moiseev wrote:
Hello.
Please consider reviewing gphoto2 camera plugin for QtMultimedia
framework written by me some time ago. It is LGPL-licensed and works
for several cameras I've tested yet:
https://github.com/cyberbobs/qtmultimedia-gphoto
Maybe it will be preferrable to you to use my plugin as base (and
share your changes :) instead of implementing whole functionality
yourself.
Currently plugin supports setting the EV and ISO parameters, but I
haven't implemented reporting the settings supported by camera itself
yet. The sad thing is I haven't found any option to receive the
supported exposure compensation values in the Qt front-end classes
(QCamera, QCameraExposure, QML Camera item) despite the fact that
backend QCameraExposureControl class supports reporting it. Note that
QML Camera item still doesn't have access to the list of available ISO
levels that QCameraExposure class supports :(
So IMO there is only one option for this functionality remains:
implement it yourself (still I planned to do so when I have some free
time to spare) and post it to Qt gerrit :)
2014-08-01 16:42 GMT+04:00 cincirin <cinci...@gmail.com
<mailto:cinci...@gmail.com>>:
Hello,
I'm trying to create a Qt media service plug-in, more exactly to
implement Canon and Nikon camera plug-in.
All main features are working well, i.e. live view, capture,
viewfinder,
etc.
But now I want to have access to all supported Canon/Nikon
exposures and
other settings.
QCameraExposure has three functions to know supportedAppertures,
supportedIsoSensitivities and supportedShutterSpeed.
But QCameraExposureControl has a lot of other flags to find other
exposure parameter:
QCameraExposureControl::ExposureCompensation - exposure compensation,
specified as qreal EV value
...
QCameraExposureControl::ExtendedExposureParameter - the base value for
platform specific extended parameters. For such parameters the
sequential values starting from ExtendedExposureParameter shuld be
used.
The question is what functions should be called from high level
QCamera*(Exposure/Focus/ImageProcessing, etc) classes in order to
QCameraExposureControl::supportedParameterRange get be called with
aforementioned exposure parameter.
I'm mainly interested in QCameraExposureControl::ExposureCompensation
and QCameraExposureControl::ExtendedExposureParameter.
Thank you.
Regards,
Marius
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С уважением, Борис.
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