private async Task <string[]> Execute(string command, string arguments, StandardStream standardStream, bool logOutput)
{
// prep the process arguments
var processStartInfo = new ProcessStartInfo
{
WindowStyle = ProcessWindowStyle.Hidden,
FileName = command,
Arguments = arguments
};
if (standardStream == StandardStream.Error)
{
processStartInfo.RedirectStandardError = true;
}
else
{
processStartInfo.RedirectStandardOutput = true;
}
// log what we're about to do
_Logger.LogInformation(arguments);
try
{
// let 'er rip
var process = Process.Start(processStartInfo);
// process each line
var lines = new List <string>();
var stream = standardStream == StandardStream.Error ? process.StandardError : process.StandardOutput;
while (!stream.EndOfStream)
{
var line = await stream.ReadLineAsync();
if (line != null)
{
if (logOutput)
{
_Logger.LogInformation(line);
}
lines.Add(line);
}
}
// make sure everything is finished
process.WaitForExit();
return(lines.ToArray());
}
catch (Exception ex)
{
throw new ExecuteException($"Could not start {command}. Is ffmpeg installed and available on your PATH?", ex);
}
}
/// <summary>
/// Call FFprobe while capturing and logging the standard output or error stream.
/// </summary>
/// <param name="arguments">The FFprobe arguments.</param>
/// <param name="standardStream">The standard stream to read.</param>
/// <returns>The lines written to the standard output or error stream.</returns>
public Task <string[]> FFprobe(string arguments, StandardStream standardStream)
{
return(FFprobe(arguments, standardStream, false));
}
/// <summary>
/// Call FFprobe while capturing and optionally logging the standard output or error stream.
/// </summary>
/// <param name="arguments">The FFprobe arguments.</param>
/// <param name="standardStream">The standard stream to read.</param>
/// <param name="logOutput">Whether to log output from the standard stream.</param>
/// <returns>The lines written to the standard output or error stream.</returns>
public Task <string[]> FFprobe(string arguments, StandardStream standardStream, bool logOutput)
{
return(Execute("ffprobe", arguments, standardStream, logOutput));
}
/// <summary>
/// Call FFmpeg while capturing and logging the standard error or output stream.
/// </summary>
/// <param name="arguments">The FFmpeg arguments.</param>
/// <param name="standardStream">The standard stream to read.</param>
/// <returns>The lines written to the standard error or output stream.</returns>
public Task <string[]> FFmpeg(string arguments, StandardStream standardStream)
{
return(FFmpeg(arguments, standardStream, true));
}
