public override string GetArguments(string inputFileName, string outputFileName)
{
VideoParameters parms =
VideoParameterOracle.GetParameters(inputFileName);
if (parms == null)
{
return(GetSimpleArguments(inputFileName, outputFileName));
}
else
{
StringBuilder paramsBuilder = new StringBuilder();
StringWriter paramsWriter = new StringWriter(paramsBuilder);
if (parms.Height.HasValue && parms.Width.HasValue)
{
paramsWriter.Write("-x {0} -y {1} ",
parms.Width, parms.Height);
}
if (parms.VideoBitrate.HasValue && parms.AudioBitrate.HasValue)
{
paramsWriter.Write("-V {0} -A {1} --two-pass ",
parms.VideoBitrate, parms.AudioBitrate);
}
else
{
paramsWriter.Write("--videoquality 8 --audioquality 6 ");
}
paramsWriter.Close();
return(string.Format(
"\"{0}\" -o \"{1}\" {2} --frontend",
inputFileName, outputFileName, paramsBuilder.ToString()));
}
}
/// <summary>
/// Obtain size argument for FFMPEG, in -s WIDTHxHEIGHT format.
/// If either dimension of the input video is larger than target
/// size, this will resize it to fit into the target size.
/// Otherwise will return a blank string.
/// </summary>
/// <param name="inputFileName"></param>
/// <param name="targetSize"></param>
/// <returns></returns>
protected string GetSizeArgument(string inputFileName,
VideoSize targetSize)
{
VideoParameters parms =
VideoParameterOracle.GetParameters(inputFileName);
VideoSize size = parms == null ? null : parms.VideoSize;
string sizeArg = "";
if (size != null && size.CompareTo(targetSize) > 0)
{
float widthRatio = (float)size.Width / targetSize.Width;
float heightRatio = (float)size.Height / targetSize.Height;
float ratio = Math.Max(widthRatio, heightRatio);
sizeArg = string.Format("-s {0}x{1}",
RoundEven((int)(size.Width / ratio)),
RoundEven((int)(size.Height / ratio)));
}
return(sizeArg);
}
