Rank: Member
Groups: Member
Joined: 3/31/2004(UTC)
Posts: 2
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hello, I found a bug in your (very good) AVI processor I'm afraid! If you try and run the following which opens an AVI, outputs a single frame to an image and closes the AVI... it works on the first cycle, but fails on the second. Obviously this is a very simple example, but it highlights the issue!! I'm being pushed to get this project sorted out this week, so a quick response would be appreciated. Regards Andy. Code:Sub form_load()
Me.Show
DoEvents
Dim TempReader As New AviReader
Debug.Print "1"
TempReader.Open App.Path & "\bum.avi"
Debug.Print TempReader.FramesPerSecond, TempReader.Height
Debug.Print "2"
Set Image1.Picture = TempReader.Frames(0).Picture
Debug.Print "3"
TempReader.Close
Debug.Print "4"
TempReader.Open App.Path & "\bum.avi"
Debug.Print TempReader.FramesPerSecond, TempReader.Height
Debug.Print "5"
Set Image1.Picture = TempReader.Frames(0).Picture 'fails here!!!
Debug.Print "6"
TempReader.Close
Debug.Print "7"
End Sub
output in immediate window: _________________________________________ 1 >>2 111 2 3 4 >>2 111 5 _________________________________________ Then error message: Run time error 8000fff Method "Picture" of object "IAviFrame" failed Edited by user Monday, December 24, 2007 6:04:13 PM(UTC)
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Rank: Advanced Member
Groups: Member, Administration
Joined: 8/2/2003(UTC)
Posts: 876
Thanks: 2 times
Was thanked: 27 time(s) in 27 post(s)
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It seems there is a bug indeed. However I have found a workaround. I noticed that only Picture property fails, so to draw the frame, you can try to use Draw method. This method draws the frame to given HDC. Image control does not have HDC, but PictureBox does, so you should use it instead of Image. Here is an example of modified code: Code: Me.Show
DoEvents
Dim TempReader As New AviReader
Dim filename As String
Picture1.AutoRedraw = True
filename = "D:\[Test Files]\AVIS\drillrle.avi"
Debug.Print "1"
TempReader.Open filename
Debug.Print TempReader.FramesPerSecond, TempReader.Height
Debug.Print "2"
TempReader.Frames(0).Draw Picture1.hDC, 0, 0
Picture1.Refresh
Debug.Print "3"
TempReader.Close
Debug.Print "4"
TempReader.Open filename
Debug.Print TempReader.FramesPerSecond, TempReader.Height
Debug.Print "5"
TempReader.Frames(0).Draw Picture1.hDC, 0, 0
Picture1.Refresh
Draw attention, to avoid erasing the image everytime you move some window over the image, you should set PictureBox AutoRedraw property to True and call Refresh to update it. Please let me know if you got any other questions. Edited by user Monday, December 24, 2007 6:04:34 PM(UTC)
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Rank: Member
Groups: Member
Joined: 3/31/2004(UTC)
Posts: 2
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Hi Andrew,
Thanks for the responce, but unfortunately I need to use the image box rather than the picture box for other reasons... one of which is that I can autostretch the image if it is part of a image box, but this is not possible in a picture box.
Any chance of fixing the bug, I'm guessing it's not a big one?
Many Thanks
Andrew
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Rank: Advanced Member
Groups: Member, Administration
Joined: 8/2/2003(UTC)
Posts: 876
Thanks: 2 times
Was thanked: 27 time(s) in 27 post(s)
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I have replied it via e-mail...
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Rank: Advanced Member
Groups: Member, Administration
Joined: 8/2/2003(UTC)
Posts: 876
Thanks: 2 times
Was thanked: 27 time(s) in 27 post(s)
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If anyone experiences the same problem, download the most recent version of AVI Processor.
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