private static String GetVideoWriterInfo()
{
if (Emgu.Util.Platform.OperationSystem == Platform.OS.Windows)
{
try
{
using (VideoWriter writer = new VideoWriter(
"tmp.avi",
0,
VideoWriter.Fourcc('H', '2', '6', '3'),
30,
new Size(704, 576),
new Tuple <VideoWriter.WriterProperty, int>[]
{
new Tuple <VideoWriter.WriterProperty, int>(VideoWriter.WriterProperty.IsColor, 1),
new Tuple <VideoWriter.WriterProperty, int>(VideoWriter.WriterProperty.HwAcceleration, (int)VideoAccelerationType.Any)
}))
{
VideoAccelerationType hwAcceleration =
(VideoAccelerationType)writer.Get(VideoWriter.WriterProperty.HwAcceleration);
return(String.Format("{0}Trying to create H263 video writer with default backend...{0}H263 VideoWriter successfully created with default backend: {1} (hw acceleration: {2})", System.Environment.NewLine, writer.BackendName, hwAcceleration));
}
}
catch (Exception e)
{
//System.Console.WriteLine(e);
return(Environment.NewLine + "Failed to create H263 VideoWriter with default backend.");
}
}
return(String.Empty);
}
public void GetSetOption()
{
using var writer = new VideoWriter("dummy2.avi", FourCCValues.MJPG, 10, new Size(640, 480));
Assert.True(writer.IsOpened());
writer.Set(VideoWriterProperties.Quality, 50);
Assert.Equal(50, writer.Get(VideoWriterProperties.Quality), 3);
}
private static String GetVideoWriterFFMPEGInfo()
{
if (Emgu.Util.Platform.OperationSystem == Platform.OS.Windows)
{
Emgu.CV.Backend[] backends = CvInvoke.WriterBackends;
int backend_idx = 0; //any backend;
String backendName = String.Empty;
foreach (Emgu.CV.Backend be in backends)
{
if (be.Name.Equals("FFMPEG"))
//if (be.Name.Equals("INTEL_MFX"))
{
backend_idx = be.ID;
backendName = be.Name;
break;
}
}
if (backend_idx > 0) //FFMPEG backend is available
{
try
{
using (VideoWriter writer = new VideoWriter(
"tmp.avi",
backend_idx,
VideoWriter.Fourcc('X', 'V', 'I', 'D'),
25,
new Size(640, 480),
new Tuple<VideoWriter.WriterProperty, int>[]
{
new Tuple<VideoWriter.WriterProperty, int>(VideoWriter.WriterProperty.IsColor, 1),
new Tuple<VideoWriter.WriterProperty, int>(VideoWriter.WriterProperty.HwAcceleration, (int) VideoAccelerationType.Any)
}))
{
VideoAccelerationType hwAcceleration =
(VideoAccelerationType)writer.Get(VideoWriter.WriterProperty.HwAcceleration);
return String.Format("{0}VideoWriter successfully created with backend: {1} (hw acceleration: {2})", System.Environment.NewLine, backendName, hwAcceleration);
}
}
catch (Exception e)
{
//System.Console.WriteLine(e);
return Environment.NewLine + "Failed to create VideoWriter with FFMPEG backend.";
}
}
else
{
return Environment.NewLine + "FFMPEG backend not found.";
}
}
return String.Empty;
}
private static String GetVideoWriterFFMPEGInfo()
{
if (Emgu.Util.Platform.OperationSystem == Platform.OS.Windows)
{
Emgu.CV.Backend[] backends = CvInvoke.WriterBackends;
int backend_idx = 0;//any backend;
String backendName = String.Empty;
foreach (Emgu.CV.Backend be in backends)
{
if (be.Name.Equals("FFMPEG"))
{
backend_idx = be.ID;
backendName = be.Name;
break;
}
}
if (backend_idx > 0) //FFMPEG backend is available
{
try
{
//Environment.SetEnvironmentVariable("OPENCV_FFMPEG_WRITER_OPTIONS", "hw_encoders_any;cuda");
using (VideoWriter writer = new VideoWriter(
"tmp.avi",
backend_idx,
VideoWriter.Fourcc('H', '2', '6', '3'), //VideoWriter.Fourcc('X', 'V', 'I', 'D'),
25,
new Size(704, 576),
new Tuple <VideoWriter.WriterProperty, int>[]
{
new Tuple <VideoWriter.WriterProperty, int>(VideoWriter.WriterProperty.IsColor, 1),
new Tuple <VideoWriter.WriterProperty, int>(VideoWriter.WriterProperty.HwAcceleration, (int)VideoAccelerationType.Any)
}))
{
VideoAccelerationType hwAcceleration =
(VideoAccelerationType)writer.Get(VideoWriter.WriterProperty.HwAcceleration);
return(String.Format("{0}Trying to create H263 video writer with FFMPEG backend...{0}H263 VideoWriter successfully created with backend: {1} (hw acceleration: {2})", System.Environment.NewLine, backendName, hwAcceleration));
}
}
catch (Exception e)
{
//System.Console.WriteLine(e);
return(Environment.NewLine + "Failed to create H263 VideoWriter with FFMPEG backend.");
}
}
else
{
return(Environment.NewLine + "FFMPEG backend not found.");
}
}
return(String.Empty);
}
private static String GetVideoWriterMSMFInfo()
{
if (Emgu.Util.Platform.OperationSystem == Platform.OS.Windows)
{
Emgu.CV.Backend[] backends = CvInvoke.WriterBackends;
int backend_idx = 0;//any backend;
String backendName = String.Empty;
foreach (Emgu.CV.Backend be in backends)
{
if (be.Name.Equals("MSMF"))
{
backend_idx = be.ID;
backendName = be.Name;
break;
}
}
if (backend_idx > 0) //MSMF backend is available
{
try
{
using (VideoWriter writer = new VideoWriter(
"tmp.mp4",
backend_idx,
VideoWriter.Fourcc('H', '2', '6', '4'),
30,
new Size(640, 480),
new Tuple <VideoWriter.WriterProperty, int>[]
{
new Tuple <VideoWriter.WriterProperty, int>(VideoWriter.WriterProperty.IsColor, 1),
new Tuple <VideoWriter.WriterProperty, int>(VideoWriter.WriterProperty.HwAcceleration, (int)VideoAccelerationType.Any)
}))
{
VideoAccelerationType hwAcceleration =
(VideoAccelerationType)writer.Get(VideoWriter.WriterProperty.HwAcceleration);
return(String.Format("{0}Trying to create H264 video writer with MSMF backend...{0}H264 VideoWriter successfully created with backend: {1} (hw acceleration: {2})", System.Environment.NewLine, backendName, hwAcceleration));
}
}
catch (Exception e)
{
//System.Console.WriteLine(e);
return(Environment.NewLine + "Failed to create H264 VideoWriter with MSMF backend.");
}
}
else
{
return(Environment.NewLine + "MSMF backend not found.");
}
}
return(String.Empty);
}
public void GetSetOption()
{
const string fileName = "dummy2.avi";
try
{
using var writer = new VideoWriter(fileName, VideoCaptureAPIs.OPENCV_MJPEG, FourCC.MJPG, 10, new Size(640, 480));
Assert.True(writer.IsOpened());
Assert.Equal("CV_MJPEG", writer.GetBackendName());
Assert.True(writer.Set(VideoWriterProperties.Quality, 50), "VideoWriter.Set failed");
Assert.Equal(50, writer.Get(VideoWriterProperties.Quality), 3);
}
finally
{
DeleteFile(fileName);
}
}
private static String GetCaptureInfo()
{
String captureText = String.Format("Capture Backends (VideoCapture from device): {0}{1}", System.Environment.NewLine, GetBackendInfo(CvInvoke.Backends));
//We don't want to create VideoCapture on Mac OS unless we have requested camera permission
if (Emgu.Util.Platform.OperationSystem != Platform.OS.MacOS)
{
using (VideoCapture cap = new VideoCapture(0, VideoCapture.API.Any,
new Tuple <CapProp, int>(CapProp.HwAcceleration, (int)VideoAccelerationType.Any)))
{
if (cap.IsOpened)
{
String backendName = cap.BackendName;
VideoAccelerationType hwAcceleration = (VideoAccelerationType)cap.Get(CapProp.HwAcceleration);
captureText +=
String.Format(
"{0}VideoCapture device successfully opened with default backend: {1} (hw acceleration: {2})",
System.Environment.NewLine, backendName, hwAcceleration);
}
}
}
captureText += String.Format("{0}{0}Stream Backends (VideoCapture from file/Stream): {0}{1}", System.Environment.NewLine, GetBackendInfo(CvInvoke.StreamBackends));
captureText += String.Format("{0}{0}VideoWriter backends: {0}{1}{0}", Environment.NewLine,
GetBackendInfo(CvInvoke.WriterBackends));
if (Emgu.Util.Platform.OperationSystem == Platform.OS.Windows)
{
Emgu.CV.Backend[] backends = CvInvoke.WriterBackends;
int backend_idx = 0;//any backend;
String backendName = String.Empty;
foreach (Emgu.CV.Backend be in backends)
{
if (be.Name.Equals("FFMPEG"))
//if (be.Name.Equals("INTEL_MFX"))
{
backend_idx = be.ID;
backendName = be.Name;
break;
}
}
if (backend_idx > 0) //FFMPEG backend is available
{
using (VideoWriter writer = new VideoWriter(
"tmp.avi",
backend_idx,
VideoWriter.Fourcc('X', 'V', 'I', 'D'),
25,
new Size(640, 480),
new Tuple <VideoWriter.WriterProperty, int>[]
{
new Tuple <VideoWriter.WriterProperty, int>(VideoWriter.WriterProperty.IsColor, 1),
new Tuple <VideoWriter.WriterProperty, int>(VideoWriter.WriterProperty.HwAcceleration, (int)VideoAccelerationType.Any)
}))
{
VideoAccelerationType hwAcceleration =
(VideoAccelerationType)writer.Get(VideoWriter.WriterProperty.HwAcceleration);
captureText += String.Format("{0}VideoWriter successfully created with backend: {1} (hw acceleration: {2})", System.Environment.NewLine, backendName, hwAcceleration);
}
}
}
return(captureText);
}
