/// <summary>
/// Append silence audio to the list.
/// </summary>
/// <param name="length">Length of the silence audio in milliseconds.</param>
/// <returns>The modified list.</returns>
public List <AudioTaskItem> Append(long length)
{
var item = new AudioTaskItem(length);
NumberStack++;
// Generate silence audio with ffmpeg
var ffmpeg = new Ffmpeg("./ffmpeg/ffmpeg.exe");
// var taskBeep = ffmpeg.StartFfmpeg(FFMPEG_ARGS_SILENCE
// .Replace("$SECS$", (length * 1000).ToString()
// .Replace("$FILE_TEMP$", $"{TempDir}\\{NumberStack}.m4a")), 1000);
var taskBeep = ffmpeg.StartFfmpeg(string.Format(FFMPEG_ARGS_SILENCE,
length / 1000,
$"{TempDir}\\{NumberStack}.mp3"), 1500);
if (!taskBeep.Result)
{
return(null);
}
item.AssignNumber(NumberStack, $"{TempDir}/{NumberStack}.mp3");
Items.Add(item);
totalDuration += item.Duration;
IsSaved = false;
return(Items);
}
/// <summary>
/// Export the list to a mp3 file.
/// </summary>
/// <param name="output">The Output object for modifying frmExport.</param>
/// <param name="destination">The full path of the audio file.</param>
/// <returns>Returns true if process is successful, false instead.</returns>
public bool ExportFile(Output output, string destination)
{
output.AddLine("開始匯出");
output.SetTotalSteps(Items.Count + 2);
// Creates temp dir
output.AddLine("正在建立暫存檔案...");
var dirNum = 0;
var outputDir = "";
while (Directory.Exists($"{TempDir}/output{dirNum}"))
{
dirNum++;
}
outputDir = $"{TempDir}/output{dirNum}".Replace("\\", "/");
Directory.CreateDirectory(outputDir);
output.AddLine($"暫存資料夾位置：{outputDir}");
// Creates ffmpeg
var ffmpeg = new Ffmpeg("./ffmpeg/ffmpeg.exe");
// Trim
output.AddLine("準備裁剪音訊");
foreach (var taskItem in Items)
{
output.AddLine($"開始剪接第{taskItem.Number}段音訊，名稱：{taskItem.Name}");
output.MoveOneStep();
var taskTrim = ffmpeg.StartFfmpeg(string.Format(FFMPEG_ARGS_TRIM,
taskItem.FilePathInTemp,
taskItem.MsIn,
taskItem.MsOut,
$"{outputDir}/{Items.IndexOf(taskItem) + 1}.mp3"));
// Check status
if (taskTrim.Result)
{
// Success
output.AddLine("成功");
}
else
{
// Fail
output.AddLine("出現未知錯誤，已停止作業");
return(false); // Terminates work
}
}
// Generate join_list.txt
output.AddLine("正在產生合併清單");
var listLines = new List <string>();
var index = 1;
while (File.Exists($"{outputDir.Replace("/","\\")}\\{index}.mp3"))
{
listLines.Add($"file {outputDir.Replace("/","\\\\")}\\\\{index}.mp3");
output.AddLine(listLines[index - 1]);
index++;
}
File.WriteAllLines($"{outputDir}/join_list.txt", listLines);
// Join audios
output.AddLine("開始合併");
output.MoveOneStep();
var taskCombine = ffmpeg.StartFfmpeg(string.Format(FFMPEG_ARGS_JOIN,
$"{outputDir.Replace("/","\\")}\\join_list.txt",
$"{outputDir.Replace("/","\\")}\\Output.mp3"));
// Check for failure
if (taskCombine.Result)
{
// Success
output.AddLine("成功合併");
}
else
{
output.AddLine("出現未知錯誤，已停止作業");
return(false);
}
// Copies the file
File.Copy($"{outputDir}/Output.mp3", destination);
output.AddLine("正在儲存檔案");
output.MoveOneStep();
return(true);
}