/// <summary>
/// Поиск ключевых кадров (второй проход алгоритма)
/// </summary>
/// <param name="videoFileName">Имя видеофайла</param>
/// <param name="frameWidth">Ширина кадра</param>
/// <param name="frameHeight">Высотка кадра</param>
/// <param name="framesDifferences">Разница кадров</param>
/// <param name="treshold">Порог</param>
/// <returns></returns>
private List<GreyVideoFrame> GetKeyFrames(string videoFileName, int frameWidth, int frameHeight,
List<int> framesDifferences, double treshold)
{
try
{
List<GreyVideoFrame> keyFrames = new List<GreyVideoFrame>();
ImageConvertor imageConvertor = new ImageConvertor();
string videoPath = System.IO.Path.GetDirectoryName(videoFileName);
string framesDirName = Path.Combine(videoPath, "VideoFrames");
if (!Directory.Exists(framesDirName))
Directory.CreateDirectory(framesDirName);
Capture capture = new Capture(videoFileName);
Image<Gray, Byte> frame = capture.QueryGrayFrame().Resize(frameWidth, frameHeight, Emgu.CV.CvEnum.INTER.CV_INTER_LINEAR);
AddKeyFrameFunction(keyFrames, frame, Path.Combine(framesDirName, "0.jpg"), 0, true);
int framesDifferencesNumber = framesDifferences.Count;
int previousFrameNumber = 0;
// BitmapConvertor bitmapConvertor = new BitmapConvertor();
for (int i = 0; i < framesDifferencesNumber; i++)
{
frame = capture.QueryGrayFrame();
if (framesDifferences[i] > treshold && i + 1 != previousFrameNumber + 1)
{
int frameNumber = i + 1;
previousFrameNumber = i + 1;
frame = capture.QueryGrayFrame().Resize(frameWidth, frameHeight, Emgu.CV.CvEnum.INTER.CV_INTER_LINEAR);
AddKeyFrameFunction(keyFrames, frame, Path.Combine(framesDirName, frameNumber.ToString() + ".jpg"), frameNumber, true);
}
if (i == framesDifferencesNumber - 1)
keyFrameExtractedEvent(i, i + 1, true);
else
keyFrameExtractedEvent(i, i + 1, false);
}
return keyFrames;
}
catch (Exception exception)
{
throw exception;
}
}
/// <summary>
/// Извлечение ключевых кадров из списка кадров
/// </summary>
/// <param name="videoFileName">Имя видео файла</param>
/// <param name="frameWidth">Ширина кадра</param>
/// <param name="frameHeight">Высота кадра</param>
/// <param name="keyFramesInformation">Список нужных кадров</param>
/// <returns>Ключевые кадры</returns>
private List<GreyVideoFrame> GetKeyFrames(string videoFileName, int frameWidth, int frameHeight, List<KeyFrameIOInformation> keyFramesInformation)
{
try
{
List<GreyVideoFrame> keyFrames = new List<GreyVideoFrame>();
ImageConvertor imageConvertor = new ImageConvertor();
string videoPath = System.IO.Path.GetDirectoryName(videoFileName);
string framesDirName = Path.Combine(videoPath, "VideoFrames");
if (!Directory.Exists(framesDirName))
Directory.CreateDirectory(framesDirName);
Capture capture = new Capture(videoFileName);
Image<Gray, Byte> frame = capture.QueryGrayFrame();
int frameNumber = 0;
CheckKeyFrameAndAddIfInList(keyFrames, keyFramesInformation, frame, framesDirName, frameNumber, frameWidth, frameHeight);
if (frame != null)
{
keyFrameExtractedEvent(frameNumber, frameNumber + 1, false);
do
{
frame = capture.QueryGrayFrame();
++frameNumber;
CheckKeyFrameAndAddIfInList(keyFrames, keyFramesInformation, frame, framesDirName, frameNumber, frameWidth, frameHeight);
if (frame != null)
keyFrameExtractedEvent(frameNumber, frameNumber + 1, false);
else
keyFrameExtractedEvent(frameNumber, frameNumber + 1, true);
}
while (frame != null);
}
else
keyFrameExtractedEvent(frameNumber, frameNumber + 1, true);
return keyFrames;
}
catch (Exception exception)
{
throw exception;
}
}
/// <summary>
/// Поиск ключевых кадров видео
/// </summary>
/// <param name="frames">Все серые кадры</param>
/// <param name="coloredFrames">Все цветные кадры</param>
/// <param name="framesDifferences">Разницы кадров</param>
/// <param name="treshold">Порог</param>
/// <returns>Ключевые кадры</returns>
private List<GreyVideoFrame> GetKeyFrames(List<Image<Gray, Byte>> frames, List<Image<Bgr, Byte>> coloredFrames,
List<int> framesDifferences, double treshold)
{
try
{
ImageConvertor imageConvertor = new ImageConvertor();
List<GreyVideoFrame> keyFrames = new List<GreyVideoFrame>();
GreyVideoFrame firstKeyFrame = new GreyVideoFrame();
firstKeyFrame.FrameNumber = 0;
firstKeyFrame.Frame = imageConvertor.ConvertColor(frames[0]);
keyFrames.Add(firstKeyFrame);
int framesDifferencesNumber = framesDifferences.Count;
int previousFrameNumber = 0;
for (int i = 0; i < framesDifferencesNumber; i++)
{
if (framesDifferences[i] > treshold && i + 1 != previousFrameNumber + 1)
{
GreyVideoFrame keyFrame = new GreyVideoFrame();
keyFrame.FrameNumber = i + 1;
previousFrameNumber = i + 1;
keyFrame.OriginalFrame = coloredFrames[i + 1];
keyFrame.Frame = imageConvertor.ConvertColor(frames[i + 1]);
keyFrames.Add(keyFrame);
}
if (i == framesDifferencesNumber - 1)
keyFrameExtractedEvent(i, i + 1, true);
else
keyFrameExtractedEvent(i, i + 1, false);
}
return keyFrames;
}
catch (Exception exception)
{
throw exception;
}
}
