Skip to content
  • Categories
  • Recent
  • Tags
  • Popular
  • Users
  • Groups
  • Search
  • Get Qt Extensions
  • Unsolved
Collapse
Brand Logo
  1. Home
  2. Qt Development
  3. General and Desktop
  4. How to find QMediaPlayer Video Resolution and Aspect Ratio
Forum Updated to NodeBB v4.3 + New Features

How to find QMediaPlayer Video Resolution and Aspect Ratio

Scheduled Pinned Locked Moved General and Desktop
qmediaplayervideoqtcreator
3 Posts 2 Posters 2.8k Views 2 Watching
  • Oldest to Newest
  • Newest to Oldest
  • Most Votes
Reply
  • Reply as topic
Log in to reply
This topic has been deleted. Only users with topic management privileges can see it.
  • P Offline
    P Offline
    Paul S131
    wrote on last edited by
    #1

    This seems too simple, I must be overlooking something?

    How do I find the native video size or aspect ratio from a video file being displayed by a QMediaPlayer?

    The video Resolution, PixelAspectRatio, etc., should be in the MetaData, but I wait for MetaData Update Signals, and wait for seconds after the video .play()s, but isMetaDataAvailable() always returns false, and .availableMetaData() and .metaData(QMediaMetaData::Resolution).toSize() always return empty.

    There seems to be nowhere else to get the video resolution information, or am I missing something?

    I can open the video, play the video at full screen, etc.

    1 Reply Last reply
    0
    • A Offline
      A Offline
      andreyc
      wrote on last edited by
      #2

      You may try to use QMediaPlayer::media() to get QMediaContent and then get a list of QMediaResources. The media resource should contain resolution data if it is available from a stream or a file.

      1 Reply Last reply
      0
      • P Offline
        P Offline
        Paul S131
        wrote on last edited by
        #3

        I tried the suggestion from andreyc using QMediaPlayer::media() - which did not work. The QMediaResources had information like URL (localFile name), but the resolution data returned 0 (unknown).

        I did find an answer at http://forum.qt.io/topic/31278/solved-get-resolution-of-a-video-file-40-qmediaplayer-41/2, using QGraphicsVideoItems class property: nativeSize after the video started playing. (Note here - need to wait for the video to actually load & play after calling QMediaPlayer::play(). )

        1 Reply Last reply
        0

        • Login

        • Login or register to search.
        • First post
          Last post
        0
        • Categories
        • Recent
        • Tags
        • Popular
        • Users
        • Groups
        • Search
        • Get Qt Extensions
        • Unsolved