Added an ffprobe helper class

This commit is contained in:
LukePulverenti Luke Pulverenti luke pulverenti 2012-08-18 17:40:24 -04:00
parent 3e86104641
commit 803ce0968e
4 changed files with 146 additions and 1 deletions

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@ -0,0 +1,68 @@
using System;
using System.Diagnostics;
using MediaBrowser.Common.Logging;
using MediaBrowser.Common.Serialization;
namespace MediaBrowser.Controller.FFMpeg
{
public static class FFProbe
{
public static FFProbeResult Run(string path)
{
ProcessStartInfo startInfo = new ProcessStartInfo();
startInfo.CreateNoWindow = true;
startInfo.UseShellExecute = false;
// Must consume both or ffmpeg may hang due to deadlocks. See comments below.
startInfo.RedirectStandardOutput = true;
startInfo.RedirectStandardError = true;
startInfo.FileName = Kernel.Instance.ApplicationPaths.FFProbePath;
startInfo.WorkingDirectory = Kernel.Instance.ApplicationPaths.FFMpegDirectory;
startInfo.Arguments = string.Format("\"{0}\" -v quiet -print_format json -show_streams -show_format", path);
Logger.LogInfo(startInfo.FileName + " " + startInfo.Arguments);
Process process = new Process();
process.StartInfo = startInfo;
try
{
process.Start();
// MUST read both stdout and stderr asynchronously or a deadlock may occurr
// If we ever decide to disable the ffmpeg log then you must uncomment the below line.
process.BeginErrorReadLine();
FFProbeResult result = JsonSerializer.DeserializeFromStream<FFProbeResult>(process.StandardOutput.BaseStream);
process.WaitForExit();
Logger.LogInfo("FFMpeg exited with code " + process.ExitCode);
return result;
}
catch (Exception ex)
{
Logger.LogException(ex);
// Hate having to do this
try
{
process.Kill();
}
catch
{
}
return null;
}
finally
{
process.Dispose();
}
}
}
}

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@ -0,0 +1,76 @@
using System.Collections.Generic;
namespace MediaBrowser.Controller.FFMpeg
{
/// <summary>
/// Provides a class that we can use to deserialize the ffprobe json output
/// Sample output:
/// http://stackoverflow.com/questions/7708373/get-ffmpeg-information-in-friendly-way
/// </summary>
public class FFProbeResult
{
public IEnumerable<MediaStream> streams { get; set; }
public MediaFormat format { get; set; }
}
public class MediaStream
{
public int index { get; set; }
public string profile { get; set; }
public string codec_name { get; set; }
public string codec_long_name { get; set; }
public string codec_type { get; set; }
public string codec_time_base { get; set; }
public string codec_tag { get; set; }
public string codec_tag_string { get; set; }
public string sample_fmt { get; set; }
public string sample_rate { get; set; }
public int channels { get; set; }
public int bits_per_sample { get; set; }
public string r_frame_rate { get; set; }
public string avg_frame_rate { get; set; }
public string time_base { get; set; }
public string start_time { get; set; }
public string duration { get; set; }
public string bit_rate { get; set; }
public int width { get; set; }
public int height { get; set; }
public int has_b_frames { get; set; }
public string sample_aspect_ratio { get; set; }
public string display_aspect_ratio { get; set; }
public string pix_fmt { get; set; }
public int level { get; set; }
public MediaTags tags { get; set; }
}
public class MediaFormat
{
public string filename { get; set; }
public int nb_streams { get; set; }
public string format_name { get; set; }
public string format_long_name { get; set; }
public string start_time { get; set; }
public string duration { get; set; }
public string size { get; set; }
public string bit_rate { get; set; }
public MediaTags tags { get; set; }
}
public class MediaTags
{
public string title { get; set; }
public string comment { get; set; }
public string artist { get; set; }
public string album { get; set; }
public string album_artist { get; set; }
public string composer { get; set; }
public string copyright { get; set; }
public string publisher { get; set; }
public string track { get; set; }
public string disc { get; set; }
public string genre { get; set; }
public string date { get; set; }
public string language { get; set; }
}
}

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@ -5,7 +5,6 @@ using System.IO;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using MediaBrowser.Common.Configuration;
using MediaBrowser.Common.Kernel;
using MediaBrowser.Controller.Configuration;
using MediaBrowser.Controller.Events;

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@ -52,6 +52,8 @@
<Compile Include="Configuration\ServerApplicationPaths.cs" />
<Compile Include="Configuration\ServerConfiguration.cs" />
<Compile Include="Events\ItemResolveEventArgs.cs" />
<Compile Include="FFMpeg\FFProbe.cs" />
<Compile Include="FFMpeg\FFProbeResult.cs" />
<Compile Include="IO\DirectoryWatchers.cs" />
<Compile Include="IO\Shortcut.cs" />
<Compile Include="Library\ItemController.cs" />