/// <summary>
/// Gets an AviSynth clip information by running a script that outputs the frame count to a file.
/// </summary>
/// <param name="source">The AviSynth script to get information about.</param>
/// <param name="options">The options that control the behaviors of the process.</param>
/// <returns>The frame count.</returns>
public static long GetFrameCount(string source, ProcessStartOptions options)
{
if (!File.Exists(source))
{
return(0);
}
string TempScriptBase = Path.ChangeExtension(source, null);
string TempScript = PathManager.GetTempFile("avs");
string TempResult = Path.ChangeExtension(TempScript, "txt");
AviSynthScriptBuilder Script;
if (source.ToLower().EndsWith(".avs"))
{
// Read source script and remove MT. Also remove Deshaker if present.
string FileContent = File.ReadAllText(source);
FileContent.Replace(Environment.NewLine + "Deshaker", Environment.NewLine + "#Deshaker");
Script = new AviSynthScriptBuilder(FileContent);
Script.RemoveMT();
}
else
{
// Generate script to read media file.
Script = new AviSynthScriptBuilder();
Script.AddPluginPath();
Script.OpenDirect(source, false);
}
// Get frame count.
Script.AppendLine();
Script.AppendLine(@"WriteFileStart(""{0}"", ""FrameRate""{1}""Framecount"")", TempResult, @", """""" "","" """""", ");
Script.AppendLine("Trim(0,-1)");
Script.WriteToFile(TempScript);
// Run script.
FFmpegProcess Worker = new FFmpegProcess(options);
Worker.RunAvisynth(TempScript);
// Read frame count
long Result = 0;
if (File.Exists(TempResult))
{
string FileString = File.ReadAllText(TempResult);
string[] FileValues = FileString.Split(',');
try {
//Result.FrameRate = float.Parse(FileValues[0], CultureInfo.InvariantCulture);
Result = int.Parse(FileValues[1]);
}
catch {
}
}
// Delete temp files.
File.Delete(TempScript);
File.Delete(TempResult);
return(Result);
}
/// <summary>
/// Creates an AviSynth script that will auto-pitch the audio to 432hz. You then open this script file in the video player instead of directly opening the file.
/// </summary>
/// <param name="inputFile">The video to play.</param>
/// <param name="infoReader">An object to read media information.</param>
public static void CreateScript(string inputFile, FFmpegProcess infoReader, string scriptLocation)
{
bool AviSynthPlus = AvisynthEnv.GetAvisynthVersion() == AvisynthVersion.AviSynthPlus;
AviSynthScriptBuilder Script = new AviSynthScriptBuilder();
Script.AddPluginPath();
if (AviSynthPlus)
{
//Script.AppendLine(@"SetFilterMTMode(""DEFAULT_MT_MODE"",2)");
//Script.AppendLine(@"SetFilterMTMode(""LWLibavVideoSource"",3)");
//Script.AppendLine(@"SetFilterMTMode(""LWLibavAudioSource"",3)");
bool IsAudio = PathManager.AudioExtensions.Contains(Path.GetExtension(inputFile).ToLower());
Script.OpenDirect(inputFile, infoReader.AudioStream != null, !IsAudio && infoReader.VideoStream != null);
if (IsAudio)
{
Script.AppendLine("AudioDub(BlankClip(Last, width=8, height=8), Last)");
}
Script.AppendLine("Preroll(int(FrameRate*3))");
// This causes a slight audio delay in AviSynth 2.6
Script.LoadPluginDll("TimeStretch.dll");
Script.AppendLine("ResampleAudio(48000)");
Script.AppendLine("TimeStretchPlugin(pitch = 100.0 * 0.98181819915771484)");
//Script.AppendLine("Prefetch({0})", CPU);
}
else
{
int CPU = Environment.ProcessorCount / 2;
Script.AppendLine("SetMTMode(3,{0})", CPU);
Script.OpenDirect(inputFile, infoReader.AudioStream != null, infoReader.VideoStream != null);
Script.AppendLine("SetMTMode(2)");
Script.AppendLine("Preroll(int(FrameRate*3))");
//Script.AppendLine("Loop(int(FrameRate/2), 0, 0)");
//Script.LoadPluginAvsi("UUSize4.avsi");
//Script.AppendLine("UUSize4(mod=4)");
// This slightly slows down playback speed but audio stays in sync
Script.AppendLine("V = AssumeFPS(432.0 / 440.0 * FrameRate)");
Script.AppendLine("A = AssumeSampleRate(int(432.0 / 440.0 * AudioRate))");
Script.AppendLine("AudioDub(V, A)");
}
Script.Cleanup();
Script.WriteToFile(scriptLocation);
}