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[Timo Jyrinki <timo.jyrinki@xxxxxxxxxxxxx>]

And the same copy-paste about testing on Qt 5.5.1 in this bug :)

If 5.5.1 solves the problem, it is possible to consider trying out
shipping Qt Multimedia 5.5 (only) on top of otherwise Qt 5.4.1 for
stable image users. This should be possible unlike mixing some of the
more core modules.

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https://bugs.launchpad.net/bugs/1514263

Title:
  [touch] Can't record camera video to a file

Status in Canonical System Image:
  New
Status in qtmultimedia-opensource-src package in Ubuntu:
  New

Bug description:
  I can't seem to get a Camera qml object to record to a file.  I get
  the error "Could not open file for video recording".  I'm using the
  sample code below [1] and get the output below [2].

  I'm using the camera, microphone, and video apparmor profiles.
  "/home/phablet/Videos/testing.testing/" did not exist.  I tried making
  that directory in case that was the problem, but it didn't help (and I
  feel like QtMultimedia should make that if needed anyway).

  === [0] Environment ===

  current build number: 154
  device name: mako
  channel: ubuntu-touch/rc-proposed/bq-aquaris.en
  last update: 2015-11-08 11:33:25
  version version: 154
  version ubuntu: 20151106.1
  version device: 20150911
  version custom: mako-1.1

  === [1] Code ===

  import QtQuick 2.4
  import QtMultimedia 5.4
  import Ubuntu.Components 1.3

  MainView {
      id: root
      applicationName: "testing.testing"

      width: units.gu(100)
      height: units.gu(75)

      Component.onCompleted: {
          camera.videoRecorder.record();
          console.log("location:", camera.videoRecorder.actualLocation);
      }

      Page {
          title: i18n.tr("Testing")

          VideoOutput {
              anchors.fill: parent
              source: camera

              Camera {
                  id: camera
              }
          }
      }
  }

  === [2] Output ===

  Loading module: 'libubuntu_application_api_touch_mirclient.so.3.0.0'
  virtual QMediaService* AalServicePlugin::create(const QString&) "org.qt-project.qt.mediaplayer"
  Creating a new static Service instance
  virtual QMediaPlayer::State AalMediaPlayerControl::state() const 

  virtual QMediaPlayer::MediaStatus AalMediaPlayerControl::mediaStatus()
  const

  virtual QMediaPlayer::MediaStatus AalMediaPlayerControl::mediaStatus()
  const

  void QMediaPlayer::setMedia(const QMediaContent&, QIODevice*)
  virtual void AalMediaPlayerControl::stop() 

  PlaybackStatusChanged signal arrived via the bus (Status: PlaybackStatus::stopped)
  virtual void AalMediaPlayerControl::setMedia(const QMediaContent&, QIODevice*) 

  Local file URI:  "file:///system/media/audio/ui/camera_click.ogg"
  setMedia() media:   QUrl( "file:///system/media/audio/ui/camera_click.ogg" ) 
  virtual QMediaPlayer::MediaStatus AalMediaPlayerControl::mediaStatus() const 

  Local file URI:  "file:///system/media/audio/ui/camera_click.ogg"
  Setting media to:   QUrl( "file:///system/media/audio/ui/camera_click.ogg" ) 
  Setting player as current player
  virtual void AalMediaPlayerControl::setAudioRole(QMediaPlayer::AudioRole)
  Setting image resolution:  QSize(3264, 1836)
  Image aspect ratio:  1.77778
  Setting thumbnail resolution:  QSize(512, 288)
  Thumbnail aspect ratio:  1.77778
  virtual void AalMediaRecorderControl::applySettings()  is not used
  shm_open() failed: Permission denied
  void AudioCapture::stopCapture()
  QMediaRecorder error: "Could not open file for video recording"
  qml: location: /home/phablet/Videos/testing.testing/video20151108_180108559.mp4
  ** Application is now active
  virtual QSGVideoNode* ShaderVideoNodePlugin::createNode(const QVideoSurfaceFormat&)
  PlaybackStatus changed to:  "stopped"
  Rendering not enabled, returning without presenting frame
  UbuntuWindow::handleSurfaceFocusChange(focused=true)
  UbuntuClipboard - Got invalid serialized mime data. Ignoring it.

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