public override List <StreamIdentifier> SetupTemplate(FFmpegCommand command, List <StreamIdentifier> streamIdList)
{
if (streamIdList.Count != 2)
{
throw new InvalidOperationException("Crossfade Concatenate requires two input video streams.");
}
var streamTo = streamIdList[1];
var streamFrom = streamIdList[0];
//grab the current length of the streamId specified
var streamFromMetadata = MetadataHelpers.GetMetadataInfo(command, streamFrom);
//from ==
// - split
// - 1: start -> (end - durationOf)
// - 2: (end - durationOf) -> end
//to ==
// - split
// - 1: start -> (start + durationOf)
// - 2: (start + durationOf) -> end
//blend ==
// - from:2 / to:1
//output ==
// - (from:1, blend, to:2)
var endMinusDuration = streamFromMetadata.VideoStream.Duration - Duration;
var fromSplit = command.Select(streamFrom)
.Filter(Filterchain.FilterTo <VideoStream>(new Split(2)));
var fromMain = fromSplit.Take(0)
.Filter(new TrimVideo(null, endMinusDuration.TotalSeconds, VideoUnitType.Seconds));
var fromBlend = fromSplit.Take(1)
.Filter(new TrimVideo(endMinusDuration.TotalSeconds, null, VideoUnitType.Seconds));
var toSplit = command.Select(streamTo)
.Filter(Filterchain.FilterTo <VideoStream>(new Split(2)));
var toBlend = toSplit.Take(0)
.Filter(new TrimVideo(null, Duration.TotalSeconds, VideoUnitType.Seconds));
var toMain = toSplit.Take(1)
.Filter(new TrimVideo(Duration.TotalSeconds, null, VideoUnitType.Seconds));
var blendOut = command.Select(toBlend.StreamIdentifiers)
.Select(fromBlend.StreamIdentifiers)
.Filter(Filterchain.FilterTo <VideoStream>(new Blend(string.Format(CrossfadeAlgorithm, Duration.TotalSeconds))));
var result = command.Select(fromMain.StreamIdentifiers)
.Select(blendOut.StreamIdentifiers)
.Select(toMain.StreamIdentifiers)
.Filter(Filterchain.FilterTo <VideoStream>(new Concat()));
return(result.StreamIdentifiers);
}
public static CommandStage Select <TStreamType>(this FFmpegCommand command, int index)
where TStreamType : class, IStream
{
var streamId = command.StreamIdentifier <TStreamType>(index);
return(command.Select(streamId));
}
public static CommandStage WithInput <TStreamType>(this FFmpegCommand command, string fileName, SettingsCollection settings)
where TStreamType : class, IStream
{
command.AddInput(fileName, settings);
return(command.Select(command.LastInputStream <TStreamType>()));
}
public static CommandStage Select(this FFmpegCommand command, params CommandStage[] stages)
{
if (stages == null || stages.Length == 0)
{
throw new ArgumentNullException("stages");
}
return(command.Select(stages.ToList()));
}
public static CommandStage Select(this FFmpegCommand command, StreamIdentifier streamId)
{
var streamIdList = new List <StreamIdentifier>()
{
streamId
};
return(command.Select(streamIdList));
}
public static CommandStage Select(this FFmpegCommand command, CommandInput resource)
{
if (resource == null)
{
throw new ArgumentNullException("resource");
}
return(command.Select(resource.GetStreamIdentifier()));
}
public static CommandStage Select <TStreamType>(this FFmpegCommand command, CommandInput resource)
where TStreamType : class, IStream
{
if (resource == null)
{
throw new ArgumentNullException("resource");
}
return(command.Select(resource.GetStreamIdentifier <TStreamType>()));
}
public static CommandStage Select(this FFmpegCommand command, List <CommandStage> stages)
{
var streams = new List <StreamIdentifier>();
foreach (var commandStage in stages)
{
if (commandStage.StreamIdentifiers == null)
{
continue;
}
streams.AddRange(commandStage.StreamIdentifiers);
}
return(command.Select(streams));
}
public override List <StreamIdentifier> SetupTemplate(FFmpegCommand command, List <StreamIdentifier> streamIdList)
{
if (streamIdList.Count != 1)
{
throw new InvalidOperationException("Crossfade Concatenate requires two input video streams.");
}
//trim ==
// - trim filter
// - reset PTS filter
var result = command.Select(streamIdList)
.Filter(Filterchain.FilterTo <VideoStream>(TrimFilter, new SetPts(SetPtsExpressionType.ResetTimestamp)));
return(result.StreamIdentifiers);
}
public static CommandStage WithInput <TStreamType>(this FFmpegCommand command, List <string> files)
where TStreamType : class, IStream
{
if (files == null || files.Count == 0)
{
throw new ArgumentException("Files cannot be null or empty.", "files");
}
var streamIds = files.Select(fileName =>
{
command.AddInput(fileName);
return(command.LastInputStream <TStreamType>());
}).ToList();
return(command.Select(streamIds));
}
public static CommandStage Filter(this FFmpegCommand command, Filterchain filterchain)
{
var outputStreamIdentifiers = command.FilterchainManager.Add(filterchain, null);
return(command.Select(outputStreamIdentifiers));
}
public static CommandStage Take(this FFmpegCommand command, int index)
{
var streamId = command.StreamIdentifier(index);
return(command.Select(streamId));
}
public static CommandStage SelectAll(this FFmpegCommand command)
{
var streamIdList = command.Inputs.SelectMany(r => r.GetStreamIdentifiers()).ToList();
return(command.Select(streamIdList));
}
public static CommandStage Select(this FFmpegCommand command, params StreamIdentifier[] streamIds)
{
var streamIdList = new List <StreamIdentifier>(streamIds);
return(command.Select(streamIdList));
}
public static CommandStage WithInputNoLoad(this FFmpegCommand command, string fileName)
{
command.AddInputNoLoad(fileName);
return(command.Select(command.LastInputStream()));
}
