public IActionResult ProduceMovieWithSubitles([FromBody] Subtitles subtitles)
{
var file = _mediaService.AddSubTitles(subtitles, GetCancellation());
return(Ok(new FileResponse {
File = file
}));
}
public int AddSubTitles(Subtitles subtitles, CancellationToken cancellationToken = default)
{
int random = new Random().Next();
var randomNewFile = random + ".mp4";
string randomFile = Path.Combine(_options.MediaStoragePath, randomNewFile);
#pragma warning disable CS4014 // Because this call is not awaited, execution of the current method continues before the call is completed
Task.Run(async() =>
{
var info = new ProcessStartInfo();
var perc = 0;
var prevPerc = 0;
var curDir = Directory.GetCurrentDirectory();
var srtFile = $"{_options.MediaStoragePath}/{new Random().Next()}.srt";
await File.WriteAllLinesAsync(srtFile, subtitles.Lines, cancellationToken);
info.FileName = "ffmpeg";
info.Arguments = $" -i {Path.Combine(_options.MediaStoragePath, subtitles.Id)} -vf subtitles={srtFile} {randomFile} -y -progress pipe:1";
info.UseShellExecute = false;
info.RedirectStandardInput = true;
info.RedirectStandardOutput = true;
info.RedirectStandardError = true;
/*
*
* frame=12444 fps= 14 q=29.0 size= 35328kB time=00:00:41.33 bitrate=7002.1kbits/s speed=0.469x
* fps=14.11
* stream_0_0_q=29.0
* bitrate=7002.1kbits/s
* total_size=36175920
* out_time_us=41331519
* out_time_ms=41331519
* out_time=00:00:41.331519
* dup_frames=0
* drop_frames=0
* speed=0.469x
* progress=continue
*/
using var proc = Process.Start(info);
proc.EnableRaisingEvents = true;
proc.Start();
proc.BeginOutputReadLine();
proc.BeginErrorReadLine();
proc.ErrorDataReceived += (s, e) =>
{
if (e == null || string.IsNullOrEmpty(e.Data))
{
return;
}
var stringD = e.Data;
if (stringD.Contains("Duration:", StringComparison.OrdinalIgnoreCase))
{ //Duration: 00:00:06.34, start: 0.000000, bitrate: 21303 kb/s
var inv = System.Globalization.NumberFormatInfo.InvariantInfo;
var parseit = stringD.TrimStart(' ')[10..];
var lines = parseit.Split(',');
var time = lines[0];
var timeparts = time.Split(':').Select(s => float.Parse(s, inv)).ToArray();
var secs = Math.Floor(timeparts[2]);
var ms = Math.Floor((timeparts[2] - secs) * 1000);
var ts = new TimeSpan(0, (int)timeparts[0], (int)timeparts[1], (int)secs, (int)ms);
duration = ts.TotalMilliseconds;
_logger.LogInformation("Found duration {0}", duration);
}
