public FFmpegCommandLineResult <MemoryStream> GetFrameStreamForVideoFile(string fileName, TimeSpan frameTime)
{
//ffmpeg -v quiet -ss 00:00:01.000 -i "filename" -an -frames:v 1 -f image2 pipe:
//
var args = new CommandLineArgumentsBuilder();
args.AppendArguments("-v", "quiet", "-ss");
args.AppendArgumentFormat(@"{0:hh\:mm\:ss\.fff}", frameTime);
args.AppendArgument("-i");
args.AppendArgumentInDoubleQuotes(fileName);
args.AppendArguments("-an", "-frames:v 1", "-f image2", "pipe:");
var psi = StdioUtils.CreateBaseStartInfo(_app);
psi.Arguments = args.ToString();
var process = new Process
{
StartInfo = psi
};
process.Start();
var memoryStream = StdioUtils.ReadProcessStandardOutput(process);
string errorText = process.StandardError.ReadToEnd();
var ret = new FFmpegCommandLineResult <MemoryStream>(memoryStream, errorText);
return(ret);
}
public FFmpegCommandLineResult <TimeSpan?> GetContainerDuration(string fileName)
{
//ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 input.mp4
CommandLineArgumentsBuilder args = new CommandLineArgumentsBuilder();
args.AppendArguments("-v error", "-show_entries", "format=duration -of default=noprint_wrappers=1:nokey=1");
args.AppendArgumentInDoubleQuotes(fileName);
var psi = StdioUtils.CreateBaseStartInfo(_app);
psi.Arguments = args.ToString();
var process = new Process();
process.StartInfo = psi;
process.Start();
process.WaitForExit(1000);
var result = process.StandardOutput.ReadToEnd().Trim(' ', '\r', '\n');
var error = process.StandardError.ReadToEnd();
double seconds;
if (double.TryParse(result,
NumberStyles.Float,
CultureInfo.InvariantCulture,
out seconds))
{
TimeSpan ret = TimeSpan.FromSeconds(seconds);
return(new FFmpegCommandLineResult <TimeSpan?>(ret, error));
}
else
{
return(new FFmpegCommandLineResult <TimeSpan?>(null, error));
}
}