protected void TranscodeFile(StorageFile videoFile, StorageFile audioFile)
{
var arguments = String.Format("-i \"{0}\" -acodec mp3 -y -ac 2 -ab 160 \"{1}\"", videoFile, audioFile);
var process = new Process {
EnableRaisingEvents = true,
StartInfo = {
FileName = _applicationPath + "\\Executables\\ffmpeg.exe",
Arguments = arguments,
CreateNoWindow = true,
RedirectStandardError = true,
RedirectStandardOutput = true,
UseShellExecute = false,
}
};
if (_onEntryDownloadStatusChange != null) _onEntryDownloadStatusChange(_youtubeEntry, DownloadState.ConvertAudioStart, 50);
process.Start();
using (var d = process.StandardError) {
var duration = new TimeSpan();
TimeSpan current;
do {
var s = d.ReadLine() ?? "";
Debug.WriteLine(s);
if (s.Contains("Duration: ")) {
duration = ParseDuration("Duration: ", ',', s);
}
else {
if (s.Contains(" time=")) {
current = ParseDuration(" time=", ' ', s);
var percentage = (current.TotalMilliseconds / duration.TotalMilliseconds) * 50;
if (_onEntryDownloadStatusChange != null) _onEntryDownloadStatusChange(_youtubeEntry, DownloadState.DownloadProgressChanged, 50 + percentage );
}
}
} while (!d.EndOfStream);
}
process.WaitForExit();
DownloadState state;
state = process.ExitCode == 0 ? DownloadState.Ready : DownloadState.Error;
if (_onEntryDownloadStatusChange != null) _onEntryDownloadStatusChange(_youtubeEntry, state, 100.0);
process.Close();
}
public static bool FileExists(StorageFolder folder, string videoFile)
{
var file = new StorageFile {StorageFolder = folder, FileName = videoFile};
return File.Exists(file.ToString());
}