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);
}
public Capture(string videoUri, string fileUri, string codec = "MPEG")
{
_vsrc = new VideoCapture(videoUri, VideoCapture.API.Ffmpeg);
_vsrc.ImageGrabbed += ImageGrabbed;
_sink = new VideoWriter(fileUri, FourCC(codec), 0.25,
new Size((int)_vsrc.GetCaptureProperty(CapProp.FrameWidth), (int)_vsrc.GetCaptureProperty(CapProp.FrameHeight)),
_vsrc.GetCaptureProperty(CapProp.Monochrome) == 0);
_sink.Set(VideoWriter.WriterProperty.NStripes, 1);
}
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);
}
}
internal void WriteFinalVideo(List <int> framesToRender, string audioFile)
{
using (outputVideo = new VideoWriter(tempVideo, Options.VIDEO_CODEC, (double)options.frame_rate, options.frame_size, true))
{
outputVideo.Set(VideoWriter.WriterProperty.Quality, options.frame_quality / 100.00);
//Update status every x frames, with a 0.1% rate
var lastFrame = 0;
var count = 0;
foreach (var frame in framesToRender)
{
var adjframe = frame + 1;
utils.ReportStatus("Writing frame {0} out of {1} {2}", count, framesToRender.Count, 2);
count++;
if (adjframe != lastFrame)
{
var framesToMove = adjframe - lastFrame;
bool nextFrame = true;
//move to next x frame
for (var i = 0; i < framesToMove; i++)
{
nextFrame = inputVideo.Grab();
}
if (!nextFrame)
{
return;
}
var img = new Mat();
inputVideo.Retrieve(img);
outputVideo.Write(img);
img.Dispose();
}
lastFrame = adjframe;
}
utils.ReportStatus("Writing frame {0} out of {1} {2}", options.frame_count, options.frame_count, 2, last: true);
}
}
