Move formatInfo initialization delay to the QMediaRecorder construction

First initialization of MediaFormatInfo may take some time,
it causes some issues for users when they call QMediaRecorder::record.
The idea is to move the first initialization to the constructor.

Task-number: QTBUG-116075
Change-Id: I90add1079b0cecfa457af9153b62e08d31c3d101
Reviewed-by: Jøger Hansegård <joger.hansegard@qt.io>
Reviewed-by: Artem Dyomin <artem.dyomin@qt.io>
(cherry picked from commit d2feae42ca6f8172dc123fecef2626da3a941b51)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

1 files changed, 9 insertions, 1 deletions

diff --git a/src/multimedia/recording/qmediarecorder.cpp b/src/multimedia/recording/qmediarecorder.cpp
index 56869b4e1..00e7d41ad 100644
--- a/src/multimedia/recording/qmediarecorder.cpp
+++ b/src/multimedia/recording/qmediarecorder.cpp
@@ -109,9 +109,17 @@ QMediaRecorder::QMediaRecorder(QObject *parent)
       d_ptr(new QMediaRecorderPrivate)
 {
     Q_D(QMediaRecorder);
+
+    auto &mediaIntegration = *QPlatformMediaIntegration::instance();
+
     d->q_ptr = this;
-    auto maybeControl = QPlatformMediaIntegration::instance()->createRecorder(this);
+    auto maybeControl = mediaIntegration.createRecorder(this);
     if (maybeControl) {
+        // The first format info initialization may take some time,
+        // for users it seems to be more suitable to have a delay on the object construction
+        // rather than on QMediaRecorder::record
+        mediaIntegration.formatInfo();
+
         d->control = maybeControl.value();
     } else {
         d->initErrorMessage = maybeControl.error();