// DAR = Display Aspect Ratio
// PAR = Pixel Aspect Ratio
// RAR = Resolution Aspect Ratio
// D = R * P
// P = D / R
// R = D / P
private MPEG4PAR GetMPEG4PARFromForm()
{
RadioButton rb;
string tag, val;
MPEG4PAR mp4PAR = new MPEG4PAR();
foreach (Control c in grpAspectRatio.Controls)
{
if ((rb = c as RadioButton) != null)
{
if (rb.Checked)
{
tag = (string)rb.Tag;
val = tag.Substring(4);
if (tag.StartsWith("PAR"))
{
// PAR
if (val == "Custom")
{
double par = Double.Parse(txtPAR_Width.Text) /
Double.Parse(txtPAR_Height.Text);
mp4PAR.SetCustomPAR(par);
}
else
{
mp4PAR.Type = (PARType)UInt32.Parse(val);
}
}
else
{
// DAR
double dar, rar, par;
if (val == "Custom")
{
dar = Double.Parse(txtDAR_Width.Text) /
Double.Parse(txtDAR_Height.Text);
}
else
{
string[] split = val.Split(':');
dar = Double.Parse(split[0]) / Double.Parse(split[1]);
}
rar = (double)_mp4Mod.FrameWidth / (double)_mp4Mod.FrameHeight;
par = dar / rar;
mp4PAR.SetCustomPAR(par);
}
break;
}
}
}
return(mp4PAR);
}
private static int Run()
{
if (!File.Exists(_pathSrc))
{
throw new Exception("Source file doesn't exist.");
}
if ((_pathDst != null) && File.Exists(_pathDst))
{
throw new Exception("Destination file already exists.");
}
bool modifying = false;
_loading = true;
AVIModifier aviMod = new AVIModifier(_pathSrc);
MPEG4FrameModifier mp4Mod = new MPEG4FrameModifier();
aviMod.FrameModifier = mp4Mod;
mp4Mod.VideoModifier = aviMod;
aviMod.ProgressCallback = new ProgressCallback(Progress);
aviMod.Preview();
Progress(1.0);
Console.WriteLine();
if (_showInfo)
{
Console.WriteLine("---------- Video Info ----------");
Console.Write(mp4Mod.GenerateStats());
Console.WriteLine("--------------------------------");
}
if (_writeFrameList)
{
Console.Write("Writing frame list...");
try {
FileStream fs = new FileStream(_frameListPath, FileMode.CreateNew, FileAccess.Write);
using (StreamWriter sw = new StreamWriter(fs)) {
mp4Mod.DumpFrameList(sw);
}
}
catch {
Console.WriteLine();
throw new Exception("Cannot write frame list, make sure the file doesn't already exist.");
}
Console.WriteLine(" Done.");
}
if (_pathDst == null)
{
return(0);
}
if (_unpack && mp4Mod.IsPacked)
{
modifying = true;
mp4Mod.NewIsPacked = false;
mp4Mod.UserDataList = mp4Mod.SuggestedUserData();
}
if (_pack && !mp4Mod.IsPacked && mp4Mod.ContainsBVOPs)
{
modifying = true;
mp4Mod.NewIsPacked = true;
mp4Mod.UserDataList = mp4Mod.SuggestedUserData();
}
if (_changePAR || _changeDAR)
{
MPEG4PAR pold = mp4Mod.PARInfo;
MPEG4PAR pnew = new MPEG4PAR();
if (_changePAR)
{
if (_parType != PARType.Custom)
{
pnew.Type = _parType;
}
else
{
pnew.SetCustomPAR(_customPAR);
}
}
else if (_changeDAR)
{
double rar = (double)mp4Mod.FrameWidth / (double)mp4Mod.FrameHeight;
pnew.SetCustomPAR(_customDAR / rar);
}
if ((pold.Type != pnew.Type) ||
((pnew.Type == PARType.Custom) &&
((pnew.Width != pold.Width) || (pnew.Height != pold.Height))))
{
modifying = true;
mp4Mod.PARInfo = pnew;
}
}
if (_changeFieldOrder && mp4Mod.IsInterlaced && (mp4Mod.TopFieldFirst != _isTFF))
{
modifying = true;
mp4Mod.TopFieldFirst = _isTFF;
}
if (!modifying && !_alwaysWrite)
{
Console.WriteLine("Aborting: Video already has the desired format.");
return(2);
}
_loading = false;
aviMod.Write(_pathDst);
Progress(1.0);
Console.WriteLine();
Console.WriteLine("Video was written successfully.");
return(0);
}