Hello
I developed an application in C# using DirectShow.NET which can capture video from a source and create video.
I used several DirectShow filters such as ffdshow Deinterlace, Smart Tee, MPEG-2 Video Encoder, AVI Mux, File Writer and etc.
I want to change properties of MPEG-2 Video Encoder. I found this code:
but this code doesn't work.
After googling more I found this code which opens a filter's property window:
It works but it's settings/properties doesn't save! Every time I should change it's properties. It weird because everytime GraphEdit opens it's property window, properties are correct (they are what I set).
What's wrong? :confused:
How can I change a filter's properties correcly?
Thanks
Regards
I developed an application in C# using DirectShow.NET which can capture video from a source and create video.
I used several DirectShow filters such as ffdshow Deinterlace, Smart Tee, MPEG-2 Video Encoder, AVI Mux, File Writer and etc.
I want to change properties of MPEG-2 Video Encoder. I found this code:
Code:
IVideoEncoder videoEncoder = videoCompressorFilter as IVideoEncoder;
object min, max, step;
videoEncoder.GetParameterRange(PropSetID.ENCAPIPARAM_BitRate, out min, out max, out step);
videoEncoder.SetValue(PropSetID.ENCAPIPARAM_BitRate, min);After googling more I found this code which opens a filter's property window:
Code:
private void DisplayPropertyPage(IBaseFilter dev)
{
//Get the ISpecifyPropertyPages for the filter
ISpecifyPropertyPages pProp = dev as ISpecifyPropertyPages;
int hr = 0;
if (pProp == null)
{
//If the filter doesn't implement ISpecifyPropertyPages, try displaying IAMVfwCompressDialogs instead!
IAMVfwCompressDialogs compressDialog = dev as IAMVfwCompressDialogs;
if (compressDialog != null)
{
hr = compressDialog.ShowDialog(VfwCompressDialogs.Config, IntPtr.Zero);
DsError.ThrowExceptionForHR(hr);
}
else
{
MessageBox.Show("Item has no property page", "No Property Page", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
}
return;
}
//Get the name of the filter from the FilterInfo struct
FilterInfo filterInfo;
hr = dev.QueryFilterInfo(out filterInfo);
DsError.ThrowExceptionForHR(hr);
// Get the propertypages from the property bag
DsCAUUID caGUID;
hr = pProp.GetPages(out caGUID);
DsError.ThrowExceptionForHR(hr);
//Create and display the OlePropertyFrame
object oDevice = (object)dev;
hr = OleCreatePropertyFrame(this.Handle, 0, 0, filterInfo.achName, 1, ref oDevice, caGUID.cElems, caGUID.pElems, 0, 0, IntPtr.Zero);
DsError.ThrowExceptionForHR(hr);
Marshal.ReleaseComObject(oDevice);
if (filterInfo.pGraph != null)
{
Marshal.ReleaseComObject(filterInfo.pGraph);
}
// Release COM objects
Marshal.FreeCoTaskMem(caGUID.pElems);
}What's wrong? :confused:
How can I change a filter's properties correcly?
Thanks
Regards