How to change format of output video file in videoRecorder?

[r3d9u11]

Hi. Is it possible to record video from camera to a specified format like "mkv" or "avi"?
By default videoRecorder uses "ogg" and chagings of settings doesn't any effect.
For example:

videoRecorder {
...
videoCodec: "h264"
mediaContainer: "mkv"
outputLocation: "/home/user/record.mkv"
...
}

will write file "/home/user/record.mkv.ogg"

What I'm doing wrong?

Thanks!

[Pablo J. Rogina]

@r3d9u11 checking documentation for CameraRecorder QML Type says:

CameraRecorder allows recording camera streams to files, and adjusting recording settings and metadata for videos.

It should not be constructed separately, instead the videoRecorder property of a Camera should be used.

See the example snippet shown there...

[r3d9u11]

@pablo-j-rogina I'm sorry for my incomplete example
Sure, I defined videoRecorder inside the Camera object:

Camera {
    id: camera
    deviceId: QtMultimedia.availableCameras[0].deviceId
    captureMode: Camera.CaptureVideo

    onError: {
        if (Camera.NoError !== error) {
            console.log("[qmlvideo] CameraItem.onError error " + error + " errorString " + errorString)
        }
    }

    videoRecorder {
        muted: true
        videoCodec: "h264"
        mediaContainer: "mp4"
        videoRecorder.outputLocation: "/home/user/Desktop/record-1.mp4"
        
        onRecorderStateChanged: {
            if (camera.videoRecorder.recorderState == CameraRecorder.RecordingState) {
                console.log("recording to: " + camera.videoRecorder.outputLocation)
            }
            else if (camera.videoRecorder.recorderState == CameraRecorder.StoppedState) {
                console.log("saved to: " + camera.videoRecorder.outputLocation)
            }
        }
    }
}

I changed it:

Camera {
    id: camera
    deviceId: QtMultimedia.availableCameras[0].deviceId
    captureMode: Camera.CaptureVideo

    onError: {
        if (Camera.NoError !== error) {
            console.log("[qmlvideo] CameraItem.onError error " + error + " errorString " + errorString)
        }
    }

    videoRecorder.muted: true
    videoRecorder.videoCodec: "h264"
    videoRecorder.mediaContainer: "mp4"
    videoRecorder.outputLocation: "/home/user/Desktop/record-1.mp4"
    
    videoRecorder.onRecorderStateChanged: {
        if (camera.videoRecorder.recorderState == CameraRecorder.RecordingState) {
            console.log("recording to: " + camera.videoRecorder.outputLocation)
        }
        else if (camera.videoRecorder.recorderState == CameraRecorder.StoppedState) {
            console.log("saved to: " + camera.videoRecorder.outputLocation)
        }
    }
}

And nothing changed, still .ogg files in output.
Both samples will write file /home/user/Desktop/record-1.mp4.ogg

Same situation with any other extensions (e.g. mkv).
Also same situation with image capturing (recorder will write images to *.ogg files, too).

I'm on Qt 5.9.8

[SGaist]

Hi,

Might be a silly question but do you have a matroska codec available for your system ?

[r3d9u11]

@sgaist Yes, I think. I can watch mkv files via VLC without any troubles, for example.

[SGaist]

The fact that VLC can play the file has no role here. VLC doesn't use the system backend. However, QtMultimedia uses the system backend hence my question about having a codec on your system.

[anil_arise]

@r3d9u11 you need to check :

1. supportedVideoCodecs
2. supportedContainers

according that set your QVideoEncoderSettings for mediarecorder

[phyllidaverdiguel70]

guys, did you finally understand how to do it or not?

[raoulfreudenbergtrp]

This post is deleted!

[jsulm]

@raoulfreudenbergtrp Maybe. If you provide more details and the code...