Android Question get GetSupportedPreviewFpsRange

[joop]

Hi ,I tried to get the supported preview ranges from my phone with:

Log("Frames/sec  modes________")
    Dim FpsRange As List = camEx.GetSupportedPreviewFpsRange
    If FpsRange.IsInitialized = False Then
        Log(TAB & "Not supported.")
    Else
        Dim fps As String
        For i=0 To FpsRange.Size-1
            fps=FpsRange.Get(i) : Log(TAB & fps)
        Next
    End If

with this :

Public Sub GetSupportedPreviewFpsRange As List
  r.Target = parameters
  Return r.RunMethod("getSupportedPreviewFpsRange")
End Sub

I got this => [I@40a908f0 as output .
If anyone could help me understand the output it would help me a lot, thanks!

 

[joop]

This is the info
http://developer.android.com/refere...Parameters.html#getSupportedPreviewFpsRange()


Returns

• a list of supported preview fps ranges. This method returns a list with at least one element. Every element is an int array of two values - minimum fps and maximum fps. The list is sorted from small to large (first by maximum fps and then minimum fps).

How do I get 2 int values from an int array in a list ,that's the question .

 

[JordiCP]

Can't test it now, but if the call returns a list, and its elements are arrays of ints, you should do

If FpsRange.IsInitialized = False Then
    Log(TAB & "Not supported.")
Else
    Dim fps() As Int
    For i=0 To FpsRange.Size-1
        fps=FpsRange.Get(i) : Log(TAB & fps(0) & TAB & fps(1))
    Next
End If

 

[joop]

Yes ,that works Jordi ! fps must be an array it gives frame rate from my phone:
7000 30000

Wich is 7 - 30 frm/sec

Thanks

 

[joop]

Well I tried to set the frame rate to 7000 with

camEx.SetPreviewFpsRange(7000,7000)

but frame rate is not changed. no errors

So i want to to read it back, if the values are stored with this reflection routine .

https://www.b4x.com/android/forum/t...ra-preview-process-lighter.28936/#post-167896

'Returns the current preview fps range.
'Range is a two elements array. The minimum value and maximum value will be stored in this array.
Public Sub GetPreviewFpsRange(Range() As Int)
  r.Target = parameters
  r.RunMethod4("getPreviewFpsRange", Array As Object(Range), Array As String("[I"))
End Sub

I have not much understanding of the use of Java classes and their fields and methods.
My question is how can I get this values with B4A (Range() As Int) this is confusing

 

[Erel]

Dim MinMax(2) As Int
CamEx.GetPreviewFpsRange(MinMax)
Log($"Min = ${MinMax(0)}"$)
Log($"Max = ${MinMax(1)}"$)

 

[joop]

Yes, that works it gives

Min = 7000
Max =7000
Thanks erel.

But frame-rate stays visual the same I see no difference on my phone (has api 16 android)
B4a isn't the cause of this , maybe it will work on some phones?

Has anyone tried this before ? what I did was this using the perfect CamEX class.

Sub Camera1_Ready (Success As Boolean)
    If Success Then
      camEx.SetPreviewSize(640, 480)
      camEx.SetJpegQuality(90)
      camEx.SetPreviewFpsRange(7000,7000)
  
      Log("CurrentPreviewFpsRange ________")
      Dim MinMax(2) As Int
     camEx.GetPreviewFpsRange(MinMax)
     Log($"Min = ${MinMax(0)}"$)               'gives 7000
     Log($"Max = ${MinMax(1)}"$)              'gives 7000
    
    camEx.CommitParameters 'Error setting parameters message when wrong.
    camEx.StartPreview
  Else
     ToastMessageShow("Cannot open camera.", True)
  End If
End Sub

Maybe it's not in the right order ?

 

[Erel]

7000 is clearly too high.
You need to call GetSupportedPreviewFpsRange to see which values are supported.

 

[joop]

GetSupportedPreviewFpsRange = 7000 - 30000
so 7000 = supported

divided / 1000 = 7 - 30 frm/sec I want a lower Fps range.

 

[joop]

camEx.setSceneMode is also not working in the class ,I am not sure it has to do
with the reflection objects. it gives no errors.
I will post a new thread with example

 

[Erel]

You are correct the numbers are multiplied by 1000: http://developer.android.com/refere....Parameters.html#getSupportedPreviewFormats()

Your code above is correct.