Qt Documentation

Contents

Video QML Type

A convenience type for showing a specified video. More...

Import Statement: import QtMultimedia 5.4
Inherits:

Item

Properties

Signals

Methods

Detailed Description

Video is a convenience type combining the functionality of a MediaPlayer and a VideoOutput into one. It provides simple video playback functionality without having to declare multiple types.

import QtQuick 2.0
import QtMultimedia 5.0

Video {
    id: video
    width : 800
    height : 600
    source: "video.avi"

    MouseArea {
        anchors.fill: parent
        onClicked: {
            video.play()
        }
    }

    focus: true
    Keys.onSpacePressed: video.playbackState == MediaPlayer.PlayingState ? video.pause() : video.play()
    Keys.onLeftPressed: video.seek(video.position - 5000)
    Keys.onRightPressed: video.seek(video.position + 5000)
}

Video supports untransformed, stretched, and uniformly scaled video presentation. For a description of stretched uniformly scaled presentation, see the fillMode property description.

See also MediaPlayer and VideoOutput.

Property Documentation

autoLoad : bool

This property indicates if loading of media should begin immediately.

Defaults to true, if false media will not be loaded until playback is started.


autoPlay : bool

This property determines whether the media should begin playback automatically.

Setting to true also sets autoLoad to true. The default is false.


availability : enumeration

Returns the availability state of the video instance.

This is one of:

ValueDescription
MediaPlayer.AvailableThe video player is available to use.
MediaPlayer.BusyThe video player is usually available, but some other process is utilizing the hardware necessary to play media.
MediaPlayer.UnavailableThere are no supported video playback facilities.
MediaPlayer.ResourceMissingThere is one or more resources missing, so the video player cannot be used. It may be possible to try again at a later time.

bufferProgress : real

This property holds how much of the data buffer is currently filled, from 0.0 (empty) to 1.0 (full).


duration : int

This property holds the duration of the media in milliseconds.

If the media doesn't have a fixed duration (a live stream for example) this will be 0.


error : enumeration

This property holds the error state of the video. It can be one of:

  • MediaPlayer.NoError - there is no current error.
  • MediaPlayer.ResourceError - the video cannot be played due to a problem allocating resources.
  • MediaPlayer.FormatError - the video format is not supported.
  • MediaPlayer.NetworkError - the video cannot be played due to network issues.
  • MediaPlayer.AccessDenied - the video cannot be played due to insufficient permissions.
  • MediaPlayer.ServiceMissing - the video cannot be played because the media service could not be instantiated.

errorString : string

This property holds a string describing the current error condition in more detail.


fillMode : enumeration

Set this property to define how the video is scaled to fit the target area.

  • VideoOutput.Stretch - the video is scaled to fit
  • VideoOutput.PreserveAspectFit - the video is scaled uniformly to fit without cropping
  • VideoOutput.PreserveAspectCrop - the video is scaled uniformly to fill, cropping if necessary

Because this type is for convenience in QML, it does not support enumerations directly, so enumerations from VideoOutput are used to access the available fill modes.

The default fill mode is preserveAspectFit.


hasAudio : bool

This property holds whether the current media has audio content.


hasVideo : bool

This property holds whether the current media has video content.


metaData : alias


muted : bool

This property holds whether the audio output is muted.


orientation : int

The orientation of the Video in degrees. Only multiples of 90 degrees is supported, that is 0, 90, 180, 270, 360, etc.


playbackRate : real

This property holds the rate at which video is played at as a multiple of the normal rate.


playbackState : enumeration

This read only property indicates the playback state of the media.

The default state is MediaPlayer.StoppedState.


position : int

This property holds the current playback position in milliseconds.

To change this position, use the seek() method.

See also seek().


seekable : bool

This property holds whether the playback position of the video can be changed.

If true, calling the seek() method will cause playback to seek to the new position.


source : url

This property holds the source URL of the media.


status : enumeration

This property holds the status of media loading. It can be one of:

  • MediaPlayer.NoMedia - no media has been set.
  • MediaPlayer.Loading - the media is currently being loaded.
  • MediaPlayer.Loaded - the media has been loaded.
  • MediaPlayer.Buffering - the media is buffering data.
  • MediaPlayer.Stalled - playback has been interrupted while the media is buffering data.
  • MediaPlayer.Buffered - the media has buffered data.
  • MediaPlayer.EndOfMedia - the media has played to the end.
  • MediaPlayer.InvalidMedia - the media cannot be played.
  • MediaPlayer.UnknownStatus - the status of the media cannot be determined.

volume : real

This property holds the volume of the audio output, from 0.0 (silent) to 1.0 (maximum volume).


Signal Documentation

paused()

This signal is emitted when playback is paused.

The corresponding handler is onPaused.


playing()

This signal is emitted when playback is started or continued.

The corresponding handler is onPlaying.


stopped()

This signal is emitted when playback is stopped.

The corresponding handler is onStopped.


Method Documentation

pause()

Pauses playback of the media.


play()

Starts playback of the media.


seek( offset)

If the seekable property is true, seeks the current playback position to offset.

Seeking may be asynchronous, so the position property may not be updated immediately.

See also seekable and position.


stop()

Stops playback of the media.


© 2015 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. Qt and respective logos are trademarks of The Qt Company Ltd in Finland and/or other countries worldwide. All other trademarks are property of their respective owners.