/// <summary>
/// Merges specified audio and video files.
/// </summary>
/// <param name="videoFile">The file containing the video.</param>
/// <param name="audioFile">The file containing the audio.</param>
/// <param name="destination">The destination file.</param>
/// <param name="options">The options for starting the process.</param>
/// <returns>The process completion status.</returns>
public static CompletionStatus Muxe(string videoFile, string audioFile, string destination, ProcessStartOptions options)
{
CompletionStatus Result = CompletionStatus.Success;
File.Delete(destination);
// FFMPEG fails to muxe H264 into MKV container. Converting to MP4 and then muxing with the audio, however, works.
string OriginalVideoFile = videoFile;
if ((videoFile.EndsWith(".264") || videoFile.EndsWith(".265")) && destination.ToLower().EndsWith(".mkv"))
{
videoFile = videoFile.Substring(0, videoFile.Length - 4) + ".mp4";
Result = Muxe(OriginalVideoFile, null, videoFile, options);
}
if (Result == CompletionStatus.Success)
{
// Join audio and video files.
FFmpegProcess Worker = new FFmpegProcess(options);
// FFMPEG-encoded AAC streams are invalid and require an extra flag to join.
bool FixAac = audioFile != null?audioFile.ToLower().EndsWith(".aac") : false;
string Query;
if (string.IsNullOrEmpty(audioFile))
{
Query = string.Format(@"-y -i ""{0}"" -vcodec copy -an ""{1}""", videoFile, destination);
}
else if (string.IsNullOrEmpty(videoFile))
{
Query = string.Format(@"-y -i ""{0}"" -acodec copy -vn ""{1}""", videoFile, destination);
}
else
{
Query = string.Format(@"-y -i ""{0}"" -i ""{1}"" -acodec copy -vcodec copy -map 0:v -map 1:a{2} ""{3}""", videoFile, audioFile, FixAac ? " -bsf:a aac_adtstoasc" : "", destination);
}
Result = Worker.RunFFmpeg(Query);
}
// Delete temp file.
if (OriginalVideoFile != videoFile)
{
File.Delete(videoFile);
}
return(Result);
}
/// <summary>
/// Concatenates (merges) all specified files.
/// </summary>
/// <param name="files">The files to merge.</param>
/// <param name="destination">The destination file.</param>
/// <param name="options">The options for starting the process.</param>
/// <returns>The process completion status.</returns>
public static CompletionStatus Concatenate(IEnumerable <string> files, string destination, ProcessStartOptions options)
{
CompletionStatus Result = CompletionStatus.None;
// Write temp file.
string TempFile = Path.Combine(Path.GetDirectoryName(destination), "MergeList.txt");
StringBuilder TempContent = new StringBuilder();
foreach (string item in files)
{
TempContent.AppendFormat("file '{0}'", item).AppendLine();
}
File.WriteAllText(TempFile, TempContent.ToString());
string Query = string.Format(@"-y -f concat -fflags +genpts -async 1 -safe 0 -i ""{0}"" -c copy ""{1}""", TempFile, destination);
FFmpegProcess Worker = new FFmpegProcess(options);
Result = Worker.RunFFmpeg(Query.ToString());
File.Delete(TempFile);
return(Result);
}
/// <summary>
/// Merges the specified list of file streams.
/// </summary>
/// <param name="fileStreams">The list of file streams to include in the output.</param>
/// <param name="destination">The destination file.</param>
/// <param name="options">The options for starting the process.</param>
/// <returns>The process completion status.</returns>
public static CompletionStatus Muxe(IEnumerable <FFmpegStream> fileStreams, string destination, ProcessStartOptions options)
{
CompletionStatus Result = CompletionStatus.Success;
List <string> TempFiles = new List <string>();
File.Delete(destination);
// FFMPEG fails to muxe H264 into MKV container. Converting to MP4 and then muxing with the audio, however, works.
foreach (FFmpegStream item in fileStreams)
{
if (item.Type == FFmpegStreamType.Video && (item.Path.EndsWith(".264") || item.Path.EndsWith(".265")) && destination.EndsWith(".mkv"))
{
string NewFile = item.Path.Substring(0, item.Path.Length - 4) + ".mp4";
Result = Muxe(item.Path, null, NewFile, options);
TempFiles.Add(NewFile);
if (Result != CompletionStatus.Success)
{
break;
}
}
}
if (Result == CompletionStatus.Success)
{
// Join audio and video files.
StringBuilder Query = new StringBuilder();
StringBuilder Map = new StringBuilder();
Query.Append("-y ");
int StreamIndex = 0;
bool HasVideo = false, HasAudio = false, HasPcmDvdAudio = false;
foreach (FFmpegStream item in fileStreams.OrderBy(f => f.Type))
{
if (item.Type == FFmpegStreamType.Video)
{
HasVideo = true;
}
if (item.Type == FFmpegStreamType.Audio)
{
HasAudio = true;
if (item.Format == "pcm_dvd")
{
HasPcmDvdAudio = true;
}
}
Query.Append("-i \"");
Query.Append(item.Path);
Query.Append("\" ");
Map.Append("-map ");
Map.Append(StreamIndex++);
Map.Append(":");
Map.Append(item.Index);
Map.Append(" ");
}
if (HasVideo)
{
Query.Append("-vcodec copy ");
}
if (HasAudio)
{
Query.Append(HasPcmDvdAudio ? "-acodec pcm_s16le " : "-acodec copy ");
}
Query.Append(Map);
// FFMPEG-encoded AAC streams are invalid and require an extra flag to join.
if (fileStreams.Any(f => f.Path.ToLower().EndsWith(".aac")))
{
Query.Append(" -bsf:a aac_adtstoasc");
}
Query.Append("\"");
Query.Append(destination);
Query.Append("\"");
FFmpegProcess Worker = new FFmpegProcess(options);
Worker.RunFFmpeg(Query.ToString());
}
// Delete temp file.
foreach (string item in TempFiles)
{
File.Delete(item);
}
return(Result);
}