private void ConfigureCompressor(VideoCompressorQualityInfo vcqi)
{
// This method is called after the compressor is connected to the
// source filter, so that the media types and format blocks contain
// useable information.
_AMMediaType[] mts;
object[] fbs;
GetMediaTypes(out mts, out fbs);
for(int i = 0; i < mts.Length; i++)
{
if(mts[i].subtype == vcqi.MediaSubType)
{
mt = mts[i];
vih = (VIDEOINFOHEADER)fbs[i];
break;
}
}
Debug.Assert(mt.subtype == vcqi.MediaSubType);
// Configure the bit rate - .Net makes a copy of fb
vih.BitRate = vcqi.BitRate;
// Update the structure in memory with what we have
mt = MediaType.Construct(mt, vih);
// Allow compressor specific configuration
// e.g. WM9+ requires extra configuration, others may as well
CompressorSpecificConfiguration(vcqi);
// Use the structure in the compressor - this will free the format
// block when it is done
SetMediaType(ref mt);
// Check for other video compression settings
IAMVideoCompression iVC = OutputPin as IAMVideoCompression;
if(iVC != null)
{
// WMV9 and WMVAdv don't work well if you modify them this way
if (FriendlyName != "WMVideo8 Encoder DMO" &&
FriendlyName != "WMVideo9 Encoder DMO")
{
iVC.put_KeyFrameRate(vcqi.KeyFrameRate);
iVC.put_Quality(vcqi.Quality);
}
}
CompressorDiagnostics("After setting media type");
}
private void ConfigureCompressor(VideoCompressorQualityInfo vcqi)
{
// This method is called after the compressor is connected to the
// source filter, so that the media types and format blocks contain
// useable information.
_AMMediaType[] mts;
object[] fbs;
GetMediaTypes(out mts, out fbs);
for(int i = 0; i < mts.Length; i++)
{
if(mts[i].subtype == vcqi.MediaSubType)
{
mt = mts[i];
vih = (VIDEOINFOHEADER)fbs[i];
break;
}
}
if (mt.subtype != vcqi.MediaSubType) {
//If we are using non-standard codecs, there may not be a match.
//PRI2: Some compressors will likely need to be configured using their own custom tools or dialogs, or will require special case subclasses.
return;
}
Debug.Assert(mt.subtype == vcqi.MediaSubType);
// Configure the bit rate - .Net makes a copy of fb
vih.BitRate = vcqi.BitRate;
// Update the structure in memory with what we have
mt = MediaType.Construct(mt, vih);
// Allow compressor specific configuration
// e.g. WM9+ requires extra configuration, others may as well
CompressorSpecificConfiguration(vcqi);
// Use the structure in the compressor - this will free the format
// block when it is done.
try {
//This was observed to fail for some non-standard compressors.
SetMediaType(ref mt);
}
catch (Exception ex) {
Trace.WriteLine("Failed to set video compressor MediaType: " + ex.ToString());
}
// Check for other video compression settings
IAMVideoCompression iVC = OutputPin as IAMVideoCompression;
if(iVC != null)
{
// WMV9 and WMVAdv don't work well if you modify them this way
if (FriendlyName != "WMVideo8 Encoder DMO" &&
FriendlyName != "WMVideo9 Encoder DMO")
{
try {
iVC.put_KeyFrameRate(vcqi.KeyFrameRate);
iVC.put_Quality(vcqi.Quality);
}
catch(Exception ex) {
Trace.WriteLine("Failed to set video compressor quality: " + ex.ToString());
}
}
}
CompressorDiagnostics("After setting media type");
}
private void UpdateVideoSettings()
{
_AMMediaType mt;
object formatBlock;
vc.CaptureGraph.Source.GetMediaType(out mt, out formatBlock);
VIDEOINFOHEADER vih = new VIDEOINFOHEADER();
bool unknownFormat = false;
if (formatBlock is VIDEOINFOHEADER) {
vih = (VIDEOINFOHEADER)formatBlock;
}
else if (formatBlock is DVINFO) {
DVCaptureGraph dvcg = vc.CaptureGraph as DVCaptureGraph;
if (dvcg != null) {
dvcg.GetVideoMediaType(out mt, out formatBlock);
if (formatBlock is VIDEOINFOHEADER) {
vih = (VIDEOINFOHEADER)formatBlock;
}
else {
unknownFormat = true;
}
}
else {
unknownFormat = true;
}
}
else {
unknownFormat = true;
}
if (unknownFormat) {
lblCurrentSettings.Text += "Unknown Video Format";
return;
}
BITMAPINFOHEADER bmih = vih.BitmapInfo;
if (lblCurrentSettings.Text == String.Empty) {
lblCurrentSettings.Text = Strings.VideoStream;
}
else {
lblCurrentSettings.Text += "\r\n\r\n" + Strings.VideoStream;
}
lblCurrentSettings.Text += string.Format(CultureInfo.CurrentCulture, "\r\n" +
Strings.AdvancedVideoSettingsStatus, TAB, bmih.Width, bmih.Height,
vih.FrameRate.ToString("F2", CultureInfo.InvariantCulture), MediaType.SubType.GuidToString(mt.subtype),
bmih.BitCount, (uint)(bmih.Width * bmih.Height * bmih.BitCount * vih.FrameRate) / 1000);
}
