Это код, который я написал, он отлично работает для меня
public static List<Resolution> GetAllAvailableResolution(DsDevice vidDev)
{
try
{
int hr;
int max = 0;
int bitCount = 0;
IBaseFilter sourceFilter = null;
var m_FilterGraph2 = new FilterGraph() as IFilterGraph2;
hr = m_FilterGraph2.AddSourceFilterForMoniker(vidDev.Mon, null, vidDev.Name, out sourceFilter);
var pRaw2 = DsFindPin.ByCategory(sourceFilter, PinCategory.Capture, 0);
var AvailableResolutions = new List<Resolution>();
VideoInfoHeader v = new VideoInfoHeader();
IEnumMediaTypes mediaTypeEnum;
hr = pRaw2.EnumMediaTypes(out mediaTypeEnum);
AMMediaType[] mediaTypes = new AMMediaType[1];
IntPtr fetched = IntPtr.Zero;
hr = mediaTypeEnum.Next(1, mediaTypes, fetched);
while (fetched != null && mediaTypes[0] != null)
{
Marshal.PtrToStructure(mediaTypes[0].formatPtr, v);
if (v.BmiHeader.Size != 0 && v.BmiHeader.BitCount != 0)
{
if (v.BmiHeader.BitCount > bitCount)
{
AvailableResolutions.Clear();
max = 0;
bitCount = v.BmiHeader.BitCount;
}
AvailableResolutions.Add(new Resolution(v.BmiHeader.Width, v.BmiHeader.Height));
if (v.BmiHeader.Width > max || v.BmiHeader.Height > max)
max = (Math.Max(v.BmiHeader.Width, v.BmiHeader.Height));
}
hr = mediaTypeEnum.Next(1, mediaTypes, fetched);
}
return AvailableResolutions;
}
catch (Exception ex)
{
Log(ex);
return new List<Resolution>();
}
}