public Image ExtractSingleFrame(int positionToExtract, Size dimensions)
{
string tempFile = Path.ChangeExtension(Path.GetTempFileName(), "jpg");
FFMPEGParameters parameters = new FFMPEGParameters()
{
InputFilePath = FilePath,
DisableAudio = true,
OutputOptions = String.Format("-f image2 -ss {0} -vframes 1", positionToExtract),
Size = dimensions,
OutputFilePath = tempFile,
};
;
string output = FFMPEG.Execute(parameters);
if (!File.Exists(tempFile))
{
throw new Exception("Could not create single frame image from video clip");
}
Image previewImage = LoadImageFromFile(tempFile);
try
{
File.Delete(tempFile);
}
catch (Exception ex)
{
throw new Exception("Failed to delete temporary file used for thumbnail " + ex.Message);
}
return(previewImage);
}
protected void GetVideoInfo()
{
string output = FFMPEG.Execute(FilePath);
Duration = InfoProcessor.GetDuration(output);
AudioBitRate = InfoProcessor.GetAudioBitRate(output);
AudioFormat = InfoProcessor.GetAudioFormat(output);
VideoFormat = InfoProcessor.GetVideoFormat(output);
Dimensions = InfoProcessor.GetVideoDimensions(output);
}
public string WatermarkVideo(string watermarkImageFilePath, bool overwrite, WatermarkPosition position, Point offset)
{
string extension = Path.GetExtension(FilePath);
string tempOutputFile = Path.ChangeExtension(Path.GetTempFileName(), extension);
string overlayFormat;
switch (position)
{
case WatermarkPosition.TopLeft:
overlayFormat = "{0}:{1}";
break;
case WatermarkPosition.TopRight:
overlayFormat = "main_w-overlay_w-{0}:{1}";
break;
case WatermarkPosition.BottomLeft:
overlayFormat = "{0}:main_h-overlay_h-{1}";
break;
case WatermarkPosition.BottomRight:
overlayFormat = "main_w-overlay_w-{0}:main_h-overlay_h-{1}";
break;
case WatermarkPosition.Center:
overlayFormat = "(main_w-overlay_w)/2-{0}:(main_h-overlay_h)/2-{1}";
break;
case WatermarkPosition.MiddleLeft:
overlayFormat = "{0}:(main_h-overlay_h)/2-{1}";
break;
case WatermarkPosition.MiddleRight:
overlayFormat = "main_w-overlay_w-{0}:(main_h-overlay_h)/2-{1}";
break;
case WatermarkPosition.CenterTop:
overlayFormat = "(main_w-overlay_w)/2-{0}:{1}";
break;
case WatermarkPosition.CenterBottom:
overlayFormat = "(main_w-overlay_w)/2-{0}:main_h-overlay_h-{1}";
break;
default:
throw new ArgumentException("Invalid position specified");
}
string overlayPostion = String.Format(overlayFormat, offset.X, offset.Y);
FFMPEGParameters parameters = new FFMPEGParameters
{
InputFilePath = FilePath,
OutputFilePath = tempOutputFile,
SameQ = true,
Overwrite = true,
VideoFilter = String.Format("\"movie=\\'{0}\\' [logo]; [in][logo] overlay={1} [out]\"", watermarkImageFilePath.Replace("\\", "\\\\"), overlayPostion)
};
string output = FFMPEG.Execute(parameters);
if (File.Exists(tempOutputFile) == false)
{
throw new ApplicationException(String.Format("Failed to watermark video {0}{1}{2}", FilePath, Environment.NewLine, output));
}
FileInfo watermarkedVideoFileInfo = new FileInfo(tempOutputFile);
if (watermarkedVideoFileInfo.Length == 0)
{
throw new ApplicationException(String.Format("Failed to watermark video {0}{1}{2}", FilePath, Environment.NewLine, output));
}
if (overwrite)
{
File.Delete(FilePath);
File.Move(tempOutputFile, FilePath);
return(FilePath);
}
return(tempOutputFile);
}
