private Mp4BoxRenderedCommand GenerateDashManifest(DashConfig config, IEnumerable <StreamVideoFile> videoFiles, IEnumerable <StreamAudioFile> audioFiles, CancellationToken cancel)
{
string mpdOutputPath = Path.Combine(config.OutputDirectory, config.OutputFileName) + ".mpd";
var mp4boxCommand = Mp4BoxCommandBuilder.BuildMp4boxMpdCommand(
videoFiles: videoFiles,
audioFiles: audioFiles,
mpdOutputPath: mpdOutputPath,
keyInterval: (config.KeyframeInterval / config.Framerate) * 1000,
additionalFlags: config.Options.AdditionalMP4BoxFlags);
// Generate DASH files.
ExecutionResult mpdResult;
stderrLog.Invoke($"Running MP4Box with arguments: {mp4boxCommand.RenderedCommand}");
try
{
mpdResult = ManagedExecution.Start(BoxPath, mp4boxCommand.RenderedCommand, stdoutLog, stderrLog, cancel);
// Dash Failed TODO: Add in Progress report behavior that was excluded from this
// Detect error in MP4Box process and cleanup, then return null.
if (mpdResult.ExitCode != 0)
{
MPD mpdFile = MPD.LoadFromFile(mpdOutputPath);
var filePaths = mpdFile.GetFileNames().Select(x => Path.Combine(config.OutputDirectory, x));
stderrLog.Invoke($"ERROR: MP4Box returned code {mpdResult.ExitCode}. File: {config.InputFilePath}");
CleanOutputFiles(filePaths);
CleanOutputFiles(mpdResult.Output);
return(null);
}
}
catch (Exception ex)
{
if (ex is OperationCanceledException)
{
throw new OperationCanceledException($"Exception running MP4box on {config.InputFilePath}", ex);
}
else
{
throw new Exception($"Exception running MP4box on {config.InputFilePath}", ex);
}
}
finally
{
CleanOutputFiles(videoFiles.Select(x => x.Path));
CleanOutputFiles(audioFiles.Select(x => x.Path));
}
return(mp4boxCommand);
}
/// <summary>
/// This method takes configuration, and a set of video and audio streams, and assemb
/// </summary>
/// <param name="config">The config to use to generate the MP4Box command.</param>
/// <param name="videoFiles">A set of video files to include in the DASH process and manifest.</param>
/// <param name="audioFiles">A set of audio files to include in the DASH process and manifest.</param>
/// <param name="cancel">A cancel token to pass to the process.</param>
/// <param name="originalFFmpegCommand">The ffmpeg command used to create the input files. This is for exception logging only, and may be left null.</param>
protected virtual Mp4BoxCommand GenerateDashManifest(DashConfig config, IEnumerable <VideoStreamCommand> videoFiles, IEnumerable <AudioStreamCommand> audioFiles, CancellationToken cancel, FFmpegCommand originalFFmpegCommand = null)
{
Mp4BoxCommand mp4boxCommand = null;
ExecutionResult mpdResult;
var log = new StringBuilder();
try
{
mp4boxCommand = Mp4BoxCommandGeneratorMethod(config, videoFiles, audioFiles);
mpdResult = ManagedExecution.Start(Mp4BoxPath, mp4boxCommand.RenderedCommand,
(x) =>
{
log.AppendLine(x);
stdoutLog.Invoke(x);
},
(x) =>
{
log.AppendLine(x);
stderrLog.Invoke(x);
}, cancel);
if (mpdResult.ExitCode != 0)
{
try
{
// Error in MP4Box.
if (File.Exists(mp4boxCommand.MpdPath))
{
MPD mpdFile = MPD.LoadFromFile(mp4boxCommand.MpdPath);
var filePaths = mpdFile.GetFileNames().Select(x => Path.Combine(config.OutputDirectory, x));
CleanFiles(filePaths);
CleanFiles(mpdResult.Output);
}
}
catch (Exception ex)
{
throw new Mp4boxFailedException(originalFFmpegCommand, mp4boxCommand, log, $"MP4Box returned code {mpdResult.ExitCode}.", ex);
}
throw new Mp4boxFailedException(originalFFmpegCommand, mp4boxCommand, log, $"MP4Box returned code {mpdResult.ExitCode}.");
}
else if (!File.Exists(mp4boxCommand.MpdPath))
{
throw new Mp4boxFailedException(originalFFmpegCommand, mp4boxCommand, log, $"MP4Box appeared to succeed, but no MPD file was created.");
}
}
catch (Exception ex)
{
if (ex is Mp4boxFailedException)
{
throw;
}
throw new Mp4boxFailedException(originalFFmpegCommand, mp4boxCommand, log, ex.Message, ex);
}
finally
{
CleanFiles(videoFiles.Select(x => x.Path));
CleanFiles(audioFiles.Select(x => x.Path));
}
return(mp4boxCommand);
}