public override string ToString()
{
//ffmpeg -i test.mp4 -f image2 -ss 00:00:14.435 -s 960*550 -vframes 1 out.jpg
//ffmpeg -i test.mp4 -ss 00:00:14.435 -s 960*550 -f image2 -vframes 1 out.jpg
//ffmpeg -i input.flv -f image2 -vf fps=fps=1 out%d.png
var builder = new StringBuilder();
builder.Append(" -i ");
builder.Append(Source.FilePath);
builder.Append(" -f image2");
if (ResizeType == ResizeType.Scale)
{
var sourceSize = new Size(Source.VideoInfo.Width, Source.VideoInfo.Height);
var resultSize = SizeUtils.CalculateOutSize(sourceSize, Width, Height);
builder.AppendFormat(" -s {0}x{1}", resultSize.Width, resultSize.Height);
}
else
{
builder.AppendFormat(" -s {0}x{1}", Width, Height);
}
var dir = Path.GetDirectoryName(OutputPath);
if (string.IsNullOrEmpty(dir))
{
throw new ApplicationException("snapshot outpath directory is null.");
}
if (!Directory.Exists(dir))
{
Directory.CreateDirectory(dir);
}
var filename = Path.GetFileNameWithoutExtension(OutputPath);
if (string.IsNullOrEmpty(filename))
{
throw new ApplicationException("snapshot outpath filename is null.");
}
var ext = Path.GetExtension(OutputPath);
if (string.IsNullOrEmpty(ext))
{
ext = ".jpg";
}
if (null != Time)
{
builder.AppendFormat(" -ss {0} -vframes 1", Time.Value);
builder.Append(" ");
builder.Append(OutputPath);
}
if (null != Number)
{
var duration = Source.VideoInfo.Duration;
var num = duration.TotalSeconds / (Number.Value - 1);
builder.AppendFormat(" -vf fps=fps=1/{0} {1}\\{2}%d{3}", Math.Floor(num), dir, filename, ext);
}
return(builder.ToString());
}