private void SplitWithFadeout(string inputFile, List <double> splitPoints,
string sFadeLength)
{
const int sampleRate = 44100;
string outFilename = inputFile + "_fadeout.m4a";
if (!double.TryParse(sFadeLength, out double fadeLength) || fadeLength <= 0)
{
throw new CsDownloadVidException("Invalid fadelength, expected a number of " +
"seconds like 4");
}
else if (splitPoints.Count == 0)
{
throw new CsDownloadVidException("Enter a time, in seconds");
}
else if (splitPoints.Count != 1)
{
throw new CsDownloadVidException("It looks like you have entered more than " +
"one time point. Please enter just one time, in seconds.");
}
else if (!inputFile.EndsWith(".m4a"))
{
throw new CsDownloadVidException("We currently only support adding fadeout " +
"for m4a files (if you have a .mp4 song, please rename it to .m4a first).");
}
else if (File.Exists(outFilename))
{
throw new CsDownloadVidException("Output file already exists " + outFilename);
}
// preemptively make sure we have a path to qaac.
CsDownloadVidFilepaths.GetQaac();
// run all in a separate thread, so that UI remains responsive.
_runner.RunInThread(() =>
{
var log = "";
new AddFadeoutUsingRawAacData().Go(inputFile, sampleRate, splitPoints[0],
fadeLength, outFilename, ref log);
_runner.TraceFiltered(log.Replace("\n", Utils.NL));
_runner.Trace(File.Exists(outFilename) ? "Successfully saved to " + outFilename :
"Error(s) occurred");
});
}
string ConvertWavToM4aSynchronous(string input, string bitrate, ref string log)
{
var outFilename = Path.GetDirectoryName(input) + Utils.Sep +
Path.GetFileNameWithoutExtension(input) + ".m4a";
var args = new List <string>();
args.Add("--quality");
args.Add("2");
args.Add("-a");
args.Add(bitrate);
args.Add("--rate");
args.Add("keep");
args.Add(input);
args.Add("-d");
args.Add(Path.GetDirectoryName(input));
RunGetStdout(CsDownloadVidFilepaths.GetQaac(),
Utils.CombineProcessArguments(args.ToArray()),
"convert to m4a", outFilename, ref log);
Utils.AssertTrue(File.Exists(outFilename));
return(outFilename);
}