Android Question Horizontal Flip of Video

[tito]

Hi b4x Team,

I'm developing an app where the user records himself via video with the front camera (selfie-mode) for a defined duration.
During record time the view is flipped/mirrored. Thats good.
After the timer has elapsed the video is running/replay automatically.

This all works good but the video is not flipped in play-mode (what should be the normal case ).
In my special case I need also the video flipped/mirrored in play-mode, so that it has the same orientation for recording(preview) and replay.

Does anyone has an idea how to flip the result video file during recording or manipulating/preprocess it after the record is done?
already looked into SimpleMediaManager but without any success

I'm also fine if there is a possiblity to just show the video horizontal flipped in a VideoView without touching the raw video file

Many Thanks
-Timo

 

[Erel]

Not simple to flip the video playback. How are you capturing the video?

 

[tito]

For capturing I took the the simple camera2 example and switched to the front cam

Sub CaptureVideo
    
    Try
        SetState(openstate, True, VideoMode)
        If cam.RecordingVideo = False Then
            mSubs.ActMode = mSubs.eMode.Record
            cam.StartVideoRecording (MyTaskIndex)
        Else
            cam.StopVideoRecording (MyTaskIndex)
            File.Copy(mSubs.VideoFileDir, "temp-" & mSubs.VideoFileName, mSubs.VideoFileDir, mSubs.VideoFileName)
            'ToastMessageShow($"Video file saved: $1.2{File.Size(mSubs.VideoFileDir, mSubs.VideoFileName) / 1024 / 1024} MB"$, True)
            Wait For (PrepareSurface) Complete (Success As Boolean)
            SetState(openstate, False, VideoMode)
        End If
    Catch
        HandleError(LastException)
    End Try
    
End Sub

and playback in a simple VideoView

instead of flipped playback is it possible to do a flipped record like in the front cam preview?

 

[Erel]

After much digging, it is easier to flip the video playback. This requires following these steps: https://www.b4x.com/android/forum/t...-with-textview-instead-of-surfaceview.163710/

Project attached.

 

[tito]

Hi Erel,

thanks for the example. Thats exactly what I need!
Perfect support