Determine the Capabilities of an AVI file
MCI Multimedisa control NOT NEEDED! Determine if an AVI (movie) file has AUDIO, VIDEO, REVERSE, TOTAL NUMBER of FRAMES, STRETCH, etc... This is good information to know about an AVI before playing it in your program. You can use this information to help you display a "meter" or a scroll bar to quickly move around in an AVI file. This is easy code, enjoy.
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Private Sub Command1_Click()
'NOTE: Some of the routines below obviously do not
'apply to an AVI, such as "Can Eject", but the routines
'within this code applies ALL multimedia (WAV, MIDI, AVI,
'CD Audio, Scanner, DAT, etc...)
Dim mssg As String * 255
Dim Rslt As String
Rslt = "Capabilities of this AVI file:" & vbCrLf & vbCrLf
'We must "open" the AVI file first
ComStr = "open c:\shut.avi type avivideo alias video1"
x% = mciSendString(ComStr, 0&, 0, 0&)
'---Can it be played?
x% = mciSendString("capability video1 can play", mssg, 255, 0)
If Left$(mssg, 4) = "true" Then
Rslt = Rslt & "- Can be played" & vbCrLf
Else
Rslt = Rslt & "- Cannot be played" & vbCrLf
End If
'---Does it have audio?
x% = mciSendString("capability video1 has audio", mssg, 255, 0)
If Left$(mssg, 4) = "true" Then
Rslt = Rslt & "- Has audio" & vbCrLf
Else
Rslt = Rslt & "- Has no audio" & vbCrLf
End If
'---Does it have video?
x% = mciSendString("capability video1 has audio", mssg, 255, 0)
If Left$(mssg, 4) = "true" Then
Rslt = Rslt & "- Has video" & vbCrLf
Else
Rslt = Rslt & "- Has no video" & vbCrLf
End If
'---Can it be played in reverse?
x% = mciSendString("capability video1 can reverse", mssg, 255, 0)
If Left$(mssg, 4) = "true" Then
Rslt = Rslt & "- Can reverse" & vbCrLf
Else
Rslt = Rslt & "- Cannot reverse" & vbCrLf
End If
'---Can it be stretched?
x% = mciSendString("capability video1 can stretch", mssg, 255, 0)
If Left$(mssg, 4) = "true" Then
Rslt = Rslt & "- Can stretch" & vbCrLf
Else
Rslt = Rslt & "- Cannot stretch" & vbCrLf
End If
'---Can it record?
x% = mciSendString("capability video1 can record", mssg, 255, 0)
If Left$(mssg, 4) = "true" Then
Rslt = Rslt & "- Can record" & vbCrLf
Else
Rslt = Rslt & "- Cannot record" & vbCrLf
End If
'---Can it eject?
x% = mciSendString("capability video1 can eject", mssg, 255, 0)
If Left$(mssg, 4) = "true" Then
Rslt = Rslt & "- Can eject" & vbCrLf
Else
Rslt = Rslt & "- Cannot eject" & vbCrLf
End If
'---Compound Device?
x% = mciSendString("capability video1 compound device", mssg, 255, 0)
If Left$(mssg, 4) = "true" Then
Rslt = Rslt & "- Compound device = TRUE" & vbCrLf
Else
Rslt = Rslt & "- Compound device = FALSE" & vbCrLf
End If
'---Uses file(s)?
x% = mciSendString("capability video1 uses files", mssg, 255, 0)
If Left$(mssg, 4) = "true" Then
Rslt = Rslt & "- Uses file(s)" & vbCrLf
Else
Rslt = Rslt & "- Does not use file(s)" & vbCrLf
End If
'---Does this use palettes?
x% = mciSendString("capability video1 uses palettes", mssg, 255, 0)
If Left$(mssg, 4) = "true" Then
Rslt = Rslt & "- Uses palettes" & vbCrLf
Else
Rslt = Rslt & "- Does not use palettes" & vbCrLf
End If
'---Can it save?
x% = mciSendString("capability video1 can save", mssg, 255, 0)
If Left$(mssg, 4) = "true" Then
Rslt = Rslt & "- Can be saved" & vbCrLf
Else
Rslt = Rslt & "- Cannot be saved" & vbCrLf
End If
'Close the AVI file
x% = mciSendString("close video1", 0&, 0, 0&)
MsgBox Rslt, , "Results"
End Sub
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