private string GenerateCommandLine()
{
string[] mbdArray = { "simple", "bits", "rd" };
string[] cmpArray = { "sad", "sse", "satd", "dct", "psnr", "bit", "rd" };
var sb = new StringBuilder();
_encProfile = _currentTask.VideoProfile as Mpeg2VideoProfile;
if (_encProfile == null)
{
return(string.Empty);
}
_inputFile = _currentTask.VideoStream.TempFile;
_outputFile = FileSystemHelper.CreateTempFile(_appConfig.DemuxLocation,
_inputFile,
"encoded.m2v");
_frameCount = _currentTask.VideoStream.FrameCount;
#region AviSynth script generation
var targetSys = _currentTask.EncodingProfile.SystemType;
int targetHeight;
var sourceFps = (float)Math.Round(_currentTask.VideoStream.Fps, 3);
var targetFps = 0f;
var changeFps = false;
var sourceAspect = (float)Math.Round(_currentTask.VideoStream.AspectRatio, 3);
var targetWidth = sourceAspect >= 1.4f ? 1024 : 720;
if (_currentTask.Input == InputType.InputDvd)
{
_currentTask.VideoStream.Width =
(int)Math.Round(_currentTask.VideoStream.Height * sourceAspect, 0);
}
if (_currentTask.EncodingProfile.OutFormat == OutputType.OutputDvd)
{
if (targetSys == 0)
{
targetHeight = 576;
if (Math.Abs(sourceFps - 25f) > 0)
{
changeFps = true;
}
targetFps = 25f;
}
else
{
targetHeight = 480;
if (Math.Abs(sourceFps - 29.970f) > 0 && Math.Abs(sourceFps - 23.976f) > 0)
{
changeFps = true;
}
targetFps = (float)Math.Round(30000f / 1001f, 3);
}
}
else
{
targetWidth = _currentTask.EncodingProfile.TargetWidth;
targetHeight = (int)Math.Floor(targetWidth / sourceAspect);
}
var resizeTo = new Size(targetWidth, targetHeight);
var sub = _currentTask.SubtitleStreams.FirstOrDefault(item => item.HardSubIntoVideo);
var subFile = string.Empty;
var keepOnlyForced = false;
if (sub != null)
{
subFile = sub.TempFile;
keepOnlyForced = sub.KeepOnlyForcedCaptions;
}
if (string.IsNullOrEmpty(_currentTask.AviSynthScript))
{
var avs = new AviSynthGenerator(_appConfig);
_currentTask.AviSynthScript = avs.Generate(_currentTask.VideoStream,
changeFps,
targetFps,
resizeTo,
StereoEncoding.None,
new StereoVideoInfo(),
true,
subFile,
keepOnlyForced,
false);
}
#endregion
#region bitrate calculation
var bitrate = _currentTask.EncodingProfile.TargetFileSize > 1
? VideoHelper.CalculateVideoBitrate(_currentTask)
: _encProfile.Bitrate;
var audBitrate = _currentTask.AudioStreams.Sum(stream => (int)stream.Bitrate / 1000);
var maxRate = 9800 - audBitrate;
#endregion
_encodingPass = _encProfile.EncodingMode == 0 ? 0 : _currentTask.StreamId;
var targetSysStr = targetSys == 0 ? "pal" : "ntsc";
sb.Append($" -i \"{_currentTask.AviSynthScript}\" -map 0:v");
sb.Append($" -target {targetSysStr}-dvd");
sb.Append($" -b:v {bitrate:0}k -maxrate {maxRate:0}k -qmin 1");
sb.Append($" -aspect {sourceAspect:0.000}".ToString(_appConfig.CInfo));
if (_encodingPass > 0)
{
sb.Append($" -pass {_encodingPass:0}");
}
if (_encProfile.MbDecision > 0)
{
sb.Append($" -mbd {mbdArray[_encProfile.MbDecision]}");
}
if (_encProfile.Trellis > 0)
{
sb.Append($" -trellis {_encProfile.Trellis:0}");
}
if (_encProfile.Cmp > 0)
{
sb.Append($" -cmp {cmpArray[_encProfile.Cmp]}");
}
if (_encProfile.SubCmp > 0)
{
sb.Append($" -subcmp {cmpArray[_encProfile.SubCmp]}");
}
if (_encProfile.DcPrecision > 0)
{
sb.Append($" -dc {_encProfile.DcPrecision}");
}
if (_encProfile.ClosedGops)
{
sb.Append(" -flags cgop -mpv_flags strict_gop -sc_threshold 1000000000");
}
if (!_encProfile.AutoGop)
{
sb.Append($" -g {_encProfile.GopLength:0}");
}
sb.Append($" -f rawvideo -y \"{_outputFile}\"");
return(sb.ToString());
}
