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>
/// The default function for generating an MP4Box command.
/// </summary>
public static Mp4BoxCommand GenerateMp4BoxCommand(DashConfig config, IEnumerable <VideoStreamCommand> videoFiles, IEnumerable <AudioStreamCommand> audioFiles)
{
// Use a default key interval of 3s if a framerate or keyframe interval is not given.
int keyInterval = (config.KeyframeInterval == 0 || config.Framerate == 0) ? 3000 : (config.KeyframeInterval / config.Framerate * 1000);
string mpdOutputPath = Path.Combine(config.OutputDirectory, config.OutputFileName) + ".mpd";
var mp4boxCommand = Mp4BoxCommandBuilder.BuildMp4boxMpdCommand(
videoFiles: videoFiles,
audioFiles: audioFiles,
mpdOutputPath: mpdOutputPath,
keyInterval: keyInterval,
additionalFlags: config.Options.AdditionalMP4BoxFlags);
return(mp4boxCommand);
}
