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Type: Bug
Resolution: Done
Priority: P3: Somewhat important
Fix Version/s: 5.15.0 RC
Affects Version/s: 5.10.0, 5.12.6
Component/s: Multimedia
Labels:
None
Environment:
Yocto: Thud
Meta-TI layer: ti2019.01
Kernel: 4.19.73
OMAP4+ device (ARMv7, DRA72X)
QPA: EGLFS

Platform/s:

Linux/Yocto
Commits:
19f6faf671438dc9c5165733a1b060fe2dfe1956 (qt/qtmultimedia/5.14)

With the following sample QML application a green box around the video is displayed and you can see some artifacts on the right and left border of the video. (see Screenshot.png)

import QtQuick 2.0
import QtMultimedia 5.12

Rectangle {
    id: root
    property bool running: false
    property string fname: "/home/root/big_buck_bunny_720x480_H264_AAC_25fps.mkv"
    color: "blue"

    Rectangle {
        width: 800
        height: 600

        anchors.top: parent.top
        anchors.left: parent.left       
        
        color: "red"

        Video {
            id: video
            anchors.fill: parent            
            source: "gst-pipeline: playbin uri=file://" + root.fname       

            MouseArea {
                anchors.fill: parent
                onClicked: {
                    if (!root.running) {
                        video.play()
                        root.running = true
                    } else {
                        video.pause()
                        root.running = false
                    }
                }
            }        
        }    
    }
}

I also attached the GStreamer pipeline graph. The file is a mkv container with a H264 codec video inside:

Topology:
  container: Matroska
    audio: MPEG-4 AAC
    video: H.264 (Main Profile)
Properties:
  Duration: 0:01:15.070000000
  Seekable: yes
  Tags: 
      title: big_buck_bunny_480p_surround-fix.avi_002.AVI.MP4
      container format: Matroska
      album artist: created with SUPER(C).v2011.bld.49
      comment: 10:51:04
      extended comment: CREATION_TIME=2011-08-04 02:50:53
      encoder: Lavf54.63.104
      audio codec: MPEG-4 AAC audio
      language code: und
      video codec: H264

The correct result should be that the video covers the whole red area without any green parts around the video and no artifacts at the right and left border.

Note: Using the playbin and the kmssink with gst-launch comandline tool the video playback is ok.