[BUG] StartScreenRecording() not working with SetDeviceCameraToImage()

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YesItsASpoon

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Location: Southern California

Posted: 16th May 2018 21:46

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I'm trying to record from an Android camera & save the video, so that I can then use that video file later in my app.

As far as I can tell, the only (hypothetical) way to do this is by combining SetDeviceCameraToImage() and StartScreenRecording(). However, while these two commands work perfectly fine individually, using them together causes my app to abruptly shut down right after the first Sync() that follows StartScreenRecording().

Here's sample code that demonstrates the issue:

+ Code Snippet

// Show camera on screen
SetDeviceCameraToImage(0,1)
CreateSprite(1,1)
SetSpriteSize(1,GetVirtualWidth(),GetVirtualHeight())
 
// Wait for user
While GetPointerPressed()=0
    Print("Press to start recording")
    Sync()
EndWhile
 
// Record screen
StartScreenRecording("raw:/sdcard/Videos/testcapcamera.mp4", 1)
g=0
While g<100
    g=g+1
    Print(g)
    Sync()
EndWhile
StopScreenRecording()
 
// All done
For g=1 to 90
    Print("Done!")
    Sync()
Next
SetDeviceCameraToImage(0,0)

I'm testing on a Samsung Galaxy S8.

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fubarpk

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Playing: AGK is my friend

Posted: 19th May 2018 11:59

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Works fine in windows for me

The audio output from the app may be audible through the microphone recording though.
Recording through the microphone requires that you enable the "Record Audio" permission
when exporting your APK.

On Android the recording may stop at any time, for example if the app is sent to the background,
or if another activity is activated such as an In App Purchase, or using the FacebookLogin command.

fubar

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YesItsASpoon

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Posted: 20th May 2018 21:24

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Hi Fubar,

Thanks for replying. Does this work in Android for you?

For me, using the SetDeviceCameraToImage() and StartScreenRecording() commands together crashes the app every time.

It's unrelated to any other Android activity (e.g. sending to the background, in-app purchase, Facebook). It simply crashes immediately after "Sync()" is executed for the first time after both SetDeviceCameraToImage() and StartScreenRecording() have started.

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fubarpk

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Posted: 22nd May 2018 23:58 Edited at: 22nd May 2018 23:59

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Sorry just found this thread again

I did notice tho in your example you don't include any setting up of resolutions or even settings for the sync rate
I understand its only a snippet but if these are leftout I have come across crashes in the past

I added this

+ Code Snippet

#constant DeviceWidth GetDeviceWidth()
#constant DeviceHeight GetDeviceHeight()
SetWindowTitle( "Video" )
SetScreenResolution( DeviceWidth, DeviceHeight )					`Set the size of the application window
SetVirtualResolution( DeviceWidth, DeviceHeight )					`Set the "virtual" screen size
SetOrientationAllowed( 0, 0, 1, 1 ) // allow only landscape on mobile devices
SetSyncRate( 30, 0 ) // 30fps instead of 60 to save battery
SetScissor( 0,0,0,0 ) // use the maximum available screen space, no black borders
UseNewDefaultFonts( 1 ) // since version 2.0.22 we can use nicer default fonts

Il now test on my phone another Samsung and tell you the results

fubar

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fubarpk

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Posted: 23rd May 2018 00:24

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ok tested this code on my phone

#constant DeviceWidth GetDeviceWidth()
#constant DeviceHeight GetDeviceHeight()
SetWindowTitle( "Video" )
SetScreenResolution( DeviceWidth, DeviceHeight )					`Set the size of the application window
SetVirtualResolution( DeviceWidth, DeviceHeight )					`Set the "virtual" screen size
SetOrientationAllowed( 0, 0, 1, 1 ) // allow only landscape on mobile devices
SetSyncRate( 30, 0 ) // 30fps instead of 60 to save battery
SetScissor( 0,0,0,0 ) // use the maximum available screen space, no black borders
UseNewDefaultFonts( 1 ) // since version 2.0.22 we can use nicer default fonts

// Show camera on screen
SetDeviceCameraToImage(0,1)
CreateSprite(1,1)
SetSpriteSize(1,GetVirtualWidth(),GetVirtualHeight())
 
// Wait for user
While GetPointerPressed()=0
    Print("Press to start recording")
    Sync()
EndWhile
 
// Record screen
StartScreenRecording("testcapcamera.mp4", 1)
g=0
While g<100
    g=g+1
    Print(g)
    Sync()
EndWhile
StopScreenRecording()
 
// All done
For g=1 to 90
    Print("Done!")
    Sync()
Next
SetDeviceCameraToImage(0,0)

+ Code Snippet

#constant DeviceWidth GetDeviceWidth()
#constant DeviceHeight GetDeviceHeight()
SetWindowTitle( "Video" )
SetScreenResolution( DeviceWidth, DeviceHeight )					`Set the size of the application window
SetVirtualResolution( DeviceWidth, DeviceHeight )					`Set the "virtual" screen size
SetOrientationAllowed( 0, 0, 1, 1 ) // allow only landscape on mobile devices
SetSyncRate( 30, 0 ) // 30fps instead of 60 to save battery
SetScissor( 0,0,0,0 ) // use the maximum available screen space, no black borders
UseNewDefaultFonts( 1 ) // since version 2.0.22 we can use nicer default fonts


// Show camera on screen
SetDeviceCameraToImage(0,1)
CreateSprite(1,1)
SetSpriteSize(1,GetVirtualWidth(),GetVirtualHeight())
 
// Wait for user
While GetPointerPressed()=0
    Print("Press to start recording")
    Sync()
EndWhile
 
// Record screen
StartScreenRecording("testcapcamera.mp4", 1)
g=0
While g<100
    g=g+1
    Print(g)
    Sync()
EndWhile
StopScreenRecording()
 
// All done
For g=1 to 90
    Print("Done!")
    Sync()
Next
SetDeviceCameraToImage(0,0)

With permissions set to record audio and camera
and it worked on my Samsung Galaxy with Android 4.4.4 installed.
Please note I also changed the rawpath as that dont exist on my phone see above

fubar

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YesItsASpoon

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Posted: 25th May 2018 05:07

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Hi Fubar,

Thank you for checking this for me. I copied & pasted your code & it still didn't work on my two test phones. But since it was working on your phone, I started looking for anything I was doing different. I think I found it.

Whenever I first run the app & start recording, I get the Android message that "[APP NAME] will start capturing everything that's displayed on your screen." I have the option to click "Don't Show Again", and then manually tell it to begin recording.

But it's that "Don't Show Again" part that was apparently killing me. If I tick that box, then the app crashes the next time I try to run it. But if I never tick the box & always manually approve it each time, then it doesn't crash.

I'm testing by installing the apk on two phones: an LG running 5.1.1, and a Samsung running 8.0.0. Same results on both.

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