protected override string GetCommandLineArguments(EncodingJob state)
{
// Get the output codec name
var videoCodec = EncodingJobFactory.GetVideoEncoder(state, GetEncodingOptions());
var format = string.Empty;
var keyFrame = string.Empty;
if (string.Equals(Path.GetExtension(state.OutputFilePath), ".mp4", StringComparison.OrdinalIgnoreCase) &&
state.Options.Context == EncodingContext.Streaming)
{
// Comparison: https://github.com/jansmolders86/mediacenterjs/blob/master/lib/transcoding/desktop.js
format = " -f mp4 -movflags frag_keyframe+empty_moov";
}
var threads = GetNumberOfThreads(state, string.Equals(videoCodec, "libvpx", StringComparison.OrdinalIgnoreCase));
var inputModifier = GetInputModifier(state);
return(string.Format("{0} {1}{2} {3} {4} -map_metadata -1 -threads {5} {6}{7} -y \"{8}\"",
inputModifier,
GetInputArgument(state),
keyFrame,
GetMapArgs(state),
GetVideoArguments(state, videoCodec),
threads,
GetAudioArguments(state),
format,
state.OutputFilePath
).Trim());
}
/// <summary>
/// Gets the input argument.
/// </summary>
/// <param name="state">The state.</param>
/// <returns>System.String.</returns>
protected string GetInputArgument(EncodingJob state)
{
var arg = string.Format("-i {0}", GetInputPathArgument(state));
if (state.SubtitleStream != null && state.Options.SubtitleMethod == SubtitleDeliveryMethod.Encode)
{
if (state.SubtitleStream.IsExternal && !state.SubtitleStream.IsTextSubtitleStream)
{
if (state.VideoStream != null && state.VideoStream.Width.HasValue)
{
// This is hacky but not sure how to get the exact subtitle resolution
double height = state.VideoStream.Width.Value;
height /= 16;
height *= 9;
arg += string.Format(" -canvas_size {0}:{1}", state.VideoStream.Width.Value.ToString(CultureInfo.InvariantCulture), Convert.ToInt32(height).ToString(CultureInfo.InvariantCulture));
}
arg += " -i \"" + state.SubtitleStream.Path + "\"";
}
}
if (state.IsVideoRequest)
{
var encodingOptions = GetEncodingOptions();
var videoEncoder = EncodingJobFactory.GetVideoEncoder(MediaEncoder, state, encodingOptions);
if (videoEncoder.IndexOf("vaapi", StringComparison.OrdinalIgnoreCase) != -1)
{
arg = "-hwaccel vaapi -hwaccel_output_format vaapi -vaapi_device " + encodingOptions.VaapiDevice + " " + arg;
}
}
return(arg.Trim());
}
/// <summary>
/// Gets the input argument.
/// </summary>
/// <param name="state">The state.</param>
/// <returns>System.String.</returns>
protected string GetInputArgument(EncodingJob state)
{
var arg = string.Format("-i {0}", GetInputPathArgument(state));
if (state.SubtitleStream != null && state.Options.SubtitleMethod == SubtitleDeliveryMethod.Encode)
{
if (state.SubtitleStream.IsExternal && !state.SubtitleStream.IsTextSubtitleStream)
{
if (state.VideoStream != null && state.VideoStream.Width.HasValue)
{
// This is hacky but not sure how to get the exact subtitle resolution
double height = state.VideoStream.Width.Value;
height /= 16;
height *= 9;
arg += string.Format(" -canvas_size {0}:{1}", state.VideoStream.Width.Value.ToString(CultureInfo.InvariantCulture), Convert.ToInt32(height).ToString(CultureInfo.InvariantCulture));
}
var subtitlePath = state.SubtitleStream.Path;
if (string.Equals(Path.GetExtension(subtitlePath), ".sub", StringComparison.OrdinalIgnoreCase))
{
var idxFile = Path.ChangeExtension(subtitlePath, ".idx");
if (FileSystem.FileExists(idxFile))
{
subtitlePath = idxFile;
}
}
arg += " -i \"" + subtitlePath + "\"";
}
}
if (state.IsVideoRequest)
{
var encodingOptions = GetEncodingOptions();
var videoEncoder = EncodingJobFactory.GetVideoEncoder(MediaEncoder, state, encodingOptions);
if (videoEncoder.IndexOf("vaapi", StringComparison.OrdinalIgnoreCase) != -1)
{
var hasGraphicalSubs = state.SubtitleStream != null && !state.SubtitleStream.IsTextSubtitleStream && state.Options.SubtitleMethod == SubtitleDeliveryMethod.Encode;
var hwOutputFormat = "vaapi";
if (hasGraphicalSubs)
{
hwOutputFormat = "yuv420p";
}
arg = "-hwaccel vaapi -hwaccel_output_format " + hwOutputFormat + " -vaapi_device " + encodingOptions.VaapiDevice + " " + arg;
}
}
return(arg.Trim());
}