Video element plays video at wrong position on IOS

timday

See "QTBUG-42721":https://bugreports.qt-project.org/browse/QTBUG-42721

I raised this as an issue with iOS video placement (using the QML VideoOutput, but it presumably sits on the same underlying code as the C++ ) a week or so ago which sounds like it's the same as hailong's problem. If it helps identify it's the same thing:

It came in with Qt5.3.2; I never saw the problem on 5.3.1.
If you rotate the device while the video is playing, it'll move to where you expect it to! (At least until the video ends; if you have it set up to loop, it might move back to the top corner again).

timday

See "QTBUG-42721":https://bugreports.qt-project.org/browse/QTBUG-42721

I raised this as an issue with iOS video placement (using the QML VideoOutput, but it presumably sits on the same underlying code as the C++ ) a week or so ago which sounds like it's the same as hailong's problem. If it helps identify it's the same thing:

It came in with Qt5.3.2; I never saw the problem on 5.3.1.
If you rotate the device while the video is playing, it'll move to where you expect it to! (At least until the video ends; if you have it set up to loop, it might move back to the top corner again).

Jacky2k

Well, then I guess it is not the same problem as I am using Qt 4.8.5.

Jacky2k

Well, then I guess it is not the same problem as I am using Qt 4.8.5.

Jacky2k

At least in my case it seems to be a problem of gsteramer and not Qt. I was able to reproduce the problem using gst-launch:
@# gst-launch -v videotestsrc ! xvimagesink@
When I use ximagesink it works perfectly fine.

Jacky2k

At least in my case it seems to be a problem of gsteramer and not Qt. I was able to reproduce the problem using gst-launch:
@# gst-launch -v videotestsrc ! xvimagesink@
When I use ximagesink it works perfectly fine.

hailong

wow, so many replies on my thread, I feel so happy that more and more people are using Qt for cross-platform app development.

I could't not solve my problem on September even if I had done a lot of research on that, so I used one week to learn how to develop for IOS and rewrited the hole app using Obj-C.

hailong

wow, so many replies on my thread, I feel so happy that more and more people are using Qt for cross-platform app development.

I could't not solve my problem on September even if I had done a lot of research on that, so I used one week to learn how to develop for IOS and rewrited the hole app using Obj-C.

Jacky2k

:P
I already tracked it down to a problem in X server or the kernel.
I know that it is caused by a change in the X server but I don't know which change and if this change is ok for newer kernels.

Jacky2k

:P
I already tracked it down to a problem in X server or the kernel.
I know that it is caused by a change in the X server but I don't know which change and if this change is ok for newer kernels.

Marika

I too have this problem. My UI code is all QML and is super simple. I have a video component

    Video {
        id: myVideo
        anchors.fill: parent
        anchors.margins: 10
        source: mediaFolder.fileUrl(filesList[mediaIndex])
    }

and a button.

    Rectangle {
        id: start
        anchors.right: parent.right
        anchors.verticalCenter: parent.verticalCenter
        anchors.margins: 20
        width: parent.height * 0.85
        height: parent.height * 0.85
        color: "blue"

        MouseArea {
            anchors.fill : parent
            onPressed: {
                mediaIndex++; myVideo.play();
            }
        }

When you click the button it plays the next video in the mediaFolder.

This works as expected on Windows and Android.

On iOS i have the random positioning problem described in this forum, which can somewhat be worked around by rotating the device (not nice).

What is my bigger problem is settling on a video encoding that works everywhere. These same videos do not play on Mac (either in my QML app or directly from Finder) or Linux (not in my QML app but DO when I launch directly from the file manager.

So for now i cant say if the positioning problem is unique to iOS, it could be on Mac and Linux too - i just cant see my video there yet.

I had settled on using Handbrakes ipod profile as the most cross platform but alas its back to the drawing board for video format. Has anyone else nailed the absolute cross platform video format?

Marika