Hi,
I am working with QMediaPlayer on Microsoft Windows using VS2015, with the
Media Foundation Backend Where I am trying to read the
QMediaMetadata:Orientation parameter.
I have loaded several test files that were generated from various iPhone and
Android Phones, and although I can read Resolution, VideoFrameRate, Duration
and so forth, but I cannot access the Orientation parameter.
Is this not implemented for this platform, or is there another method to read
this data.
Thanks Steve
Code Samples and Additional info:
----------------------------------------------
To attempt to read the rotation, I successfully connect to the
mediaStatusChanged signal, and receive QMediaPlayer::LoadedMedia status,
. E.g. this code succeeds:
QVariant var = mPlayer->metaData(QMediaMetaData::Resolution);
if (var.isValid() && var.canConvert<QSize>() && var.toSize() !=
mNativeSize)
{
mNativeSize = var.toSize();
mImage = QImage(mNativeSize.width(), mNativeSize.height(),
QImage::Format_ARGB32_Premultiplied);
mImage.fill(Qt::white);
// Video surface is used with VideoRendering::Software
if (mVideoSurface)
{
mVideoSurface->SetNativeSize(mNativeSize);
}
}
If I query mPlayer->availableMetaData(), it returns the following attributes:
Duration
AudioBitRate
ChannelCount
AudioCode
SampleRate
VideoBitRate
Resolution
VideoFrameRate
VideoCodec
PixelAspectRatio
Date
MediaType
Obviously, Orientation is missing, so this code fails:
QStringList metaData = mPlayer->availableMetaData();
if (metaData.contains(QMediaMetaData::Orientation))
{
var = mPlayer->metaData(QMediaMetaData::Orientation);
if (var.isValid())
{
mRotation = var.toInt();
}
}
Steve Schilz
Software Engineer III
PASCO scientific
www.pasco.com<http://www.pasco.com/>
think science
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