
AviCompressor.CompressorDataSize Property |
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| Returns the size of the SAFEARRAY of Byte returned by CompressorData. | ||
| Syntax: | Public CompressorDataSize As Long |
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| Limitations: | Read only. |
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| Remarks: | The CompressorDataSize is useful, if codec properties are to be saved to a file. Reading the size value first from file, enables an application to create an array of the matching size that will get the codec properties. |
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| Sample: | How to use the CompressorDataSize is shown in the sample Saving Codec Properties. ' Global declaration of the AviCompressr object Dim Codec As AviCompressor Save the data from a codec that was selected in a combo box. Private Sub cmdSaveData_Click() Dim Data() As Byte ' Dynamic array for the data stream. Open "test.bin" For Binary As #1 ' Must be opened binary! ' Save the length of the codec's name. Put #1, , Len(Codec.Name) ' Save the name of the codec. Put #1, , Codec.Name ' Save the byte count of the data stream. It is used ' when data is loaded from file to resize the dynamic array. Put #1, , Codec.CompressorDataSize ' Get the data from the codec. Data = Codec.CompressorData ' Save the data to the file. Put #1, , Data Close #1 End Sub Load the previously saved data and assign it to a codec. Private Sub cmdLoadData_Click() Dim Data() As Byte ' Dynamic array for the data stream. Dim Length As Long ' Length of the data stream. Dim NameLength As Long ' Length of the codec's name. Dim CodecName As String ' Name of the codec. Dim i As Integer Open "test.bin" For Binary As #1 ' Must be opened binary! ' Read the length of the codec's name. Get #1, , NameLength ' Allocate memory for the name. CodecName = String(NameLength, " ") ' Read the name of the codec. Get #1, , CodecName ' Compare the names. If CodecName = Codec.Name Then ' Read the length of the follwing data. Get #1, , Length ' Resize the data array to Length. ReDim Data(Length) ' Read the codec data from the file. Get #1, , Data ' Assign the read data to the codec object. Codec.CompressorData = Data Else MsgBox "The saved data does not match to the used codec." + Chr(13) + _ "saved: " + CodecName + Chr(13) + _ "used: " + Codec.Name End If Close #1 End Sub |
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| See Also: | AviCompressor, AviCompressor.CompressorData | |