can you show me the lib folder?
and how to include it in .pro .
an example will be great!!

As I wrote. Study the example. You said MediaInfo builds correctly on your system, so you have access to all the info you need, since it builds perfectly in Qt Creator. Don't expect everything to be done for you...
Good luck!

oh!ok.
can you show me the lib folder?
and how to include it in .pro .
an example will be great!!

i want it as a lib

MediaInfoLib IS the lib. I thought this would have been clear enough...
MediaInfo is just an application using it. Study that example to learn how to use it.

can you help?

As @SGaist suggested, I'm affraid that you will have to ask the authors of that library, as I haven't tried that one yet :-(.

@saber said in how to get media file information.:

just giving me this "QVariant(Invalid)"

Since QMediaMetaData::Duration is a qint64 as per http://doc.qt.io/qt-5/qmediametadata.html, maybe try as follows:

QString::number(m_player->metaData(QMediaMetaData::Duration))

and i tried this but not getting the duration.

m_player->metaData(QMediaMetaData::Duration).toString();

just giving me this "QVariant(Invalid)"

this way can i get image info

It doesn't seem to work for images (as tested from the minimal example I posted above...)

But, from searching on this forum (or on Google), the answer for pictures is given here:
https://forum.qt.io/topic/83259/get-metadata-date-taken-location-from-photo-jpeg/2
https://github.com/mayanklahiri/easyexif

@saber said in how to get media file information.:

please give me some suggestion

Have a look at:
http://en.cppreference.com/w/cpp/links/libs

this way can i get image info??
if yes , how to get that?

some of the specialized libraries out there.

please give me some suggestion.

Resolution,PixelAspectRatio

Probably because this info is not available in the AVI header (maybe not part of the AVI specs?).

@saber said in how to get media file information.:

and we ONLY get the metadata what is Available

You could probably use the metaData() method to query by key all the possible/relevant
keys defined in the QMediaMetaData namespace, and check if it returns something valid?

QVariant metaData(const QString &key) const;

Also keep in mind that Qt's Multimedia framework is not as complete as some of the specialized libraries out there.

some questions
why we not getting Resolution,PixelAspectRatio ??

and we ONLY get the metadata what is Available??

but don't know how to use that

This is a minimal example you can try out:
(based on: http://qt.shoutwiki.com/wiki/Using_Qt_Mobility_to_get_metadata_from_media_files)

1. Define player as a class member:

private:
    QMediaPlayer *m_player;

2. In your code:

   m_player = new QMediaPlayer(this);
  connect(m_player, SIGNAL(mediaStatusChanged(QMediaPlayer::MediaStatus)), this, SLOT(onMediaStatusChanged(QMediaPlayer::MediaStatus)));

   m_player->setMedia(QUrl::fromLocalFile("C:\\yourMovie.avi"));

3. Define the onMediaStatusChanged slot e.g. as follows:

void MainWindow::onMediaStatusChanged(QMediaPlayer::MediaStatus status)
{
    if (status == QMediaPlayer::LoadedMedia)
        GetMetaData(m_player);
}

4. The GetMetaData() method lists all available metadata:

void MainWindow::GetMetaData(QMediaPlayer *player)
{
   // Get the list of keys there is metadata available for
   QStringList metadatalist = player->availableMetaData();

   // Get the size of the list
   int list_size = metadatalist.size();

   //qDebug() << player->isMetaDataAvailable() << list_size;

   // Define variables to store metadata key and value
   QString metadata_key;
   QVariant var_data;

   for (int indx = 0; indx < list_size; indx++)
   {
     // Get the key from the list
     metadata_key = metadatalist.at(indx);

     // Get the value for the key
     var_data = player->metaData(metadata_key);

    qDebug() << metadata_key << var_data.toString();
   }
 }

The output on a sample .avi movie on my system is:

"AudioBitRate" "128000"
"AudioCodec" "MPEG Audio Layer-3 (MP3)"
"ChannelCount" "2"
"Copyright" "SaM"
"Duration" "5069876"
"PixelAspectRatio" ""
"Resolution" ""
"SampleRate" "48000"
"VideoBitRate" "1028056"
"VideoCodec" "MPEG-4 part 2 Video (MP4V)"
"VideoFrameRate" "24"

It uses the QMediaMetaData namespace:
http://doc.qt.io/qt-5/qmediametadata.html#details