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Simplified ffmpeg chapter parser by using json insterad of xml.

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This commit is contained in:
Michael Bucari-Tovo 2021-07-01 13:16:09 -06:00
parent 6dafa03554
commit 729212a5d5
1 changed files with 15 additions and 22 deletions
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37
AaxDecrypter/Chapters.cs
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@ -1,9 +1,9 @@
using Dinah.Core; using Dinah.Core;
using Dinah.Core.Diagnostics; using Dinah.Core.Diagnostics;
using Newtonsoft.Json.Linq;
using System; using System;
using System.Collections.Generic; using System.Collections.Generic;
using System.Diagnostics; using System.Diagnostics;
using System.Globalization;
using System.Linq; using System.Linq;
using System.Text; using System.Text;
@ -14,36 +14,25 @@ namespace AaxDecrypter
private List<Chapter> _chapterList = new List<Chapter>(); private List<Chapter> _chapterList = new List<Chapter>();
public IEnumerable<Chapter> Chapters => _chapterList.AsEnumerable(); public IEnumerable<Chapter> Chapters => _chapterList.AsEnumerable();
public int Count => _chapterList.Count; public int Count => _chapterList.Count;
public ChapterInfo() { } public ChapterInfo() { }
public ChapterInfo(string audiobookFile) public ChapterInfo(string audiobookFile)
{ {
var info = new ProcessStartInfo var info = new ProcessStartInfo
{ {
FileName = DecryptSupportLibraries.ffprobePath, FileName = DecryptSupportLibraries.ffprobePath,
Arguments = "-loglevel panic -show_chapters -print_format xml \"" + audiobookFile + "\"" Arguments = "-loglevel panic -show_chapters -print_format json \"" + audiobookFile + "\""
}; };
var xml = info.RunHidden().Output; var xml = info.RunHidden().Output;
var chapterJObject = JObject.Parse(xml);
var chapters = chapterJObject["chapters"]
.Select(c => new Chapter(
c["tags"]?["title"]?.Value<string>(),
c["start_time"].Value<double>(),
c["end_time"].Value<double>()
));
var xmlDocument = new System.Xml.XmlDocument(); _chapterList.AddRange(chapters);
xmlDocument.LoadXml(xml);
var chaptersXml = xmlDocument.SelectNodes("/ffprobe/chapters/chapter")
.Cast<System.Xml.XmlNode>()
.Where(n => n.Name == "chapter");
foreach (var cnode in chaptersXml)
{
double startTime = double.Parse(cnode.Attributes["start_time"].Value.Replace(",", "."), CultureInfo.InvariantCulture);
double endTime = double.Parse(cnode.Attributes["end_time"].Value.Replace(",", "."), CultureInfo.InvariantCulture);
string chapterTitle = cnode.ChildNodes
.Cast<System.Xml.XmlNode>()
.Where(childnode => childnode.Attributes["key"].Value == "title")
.Select(childnode => childnode.Attributes["value"].Value)
.FirstOrDefault();
AddChapter(new Chapter(chapterTitle, (long)(startTime * 1000), (long)((endTime - startTime) * 1000)));
}
} }
public void AddChapter(Chapter chapter) public void AddChapter(Chapter chapter)
{ {
@ -79,6 +68,10 @@ namespace AaxDecrypter
StartOffset = TimeSpan.FromMilliseconds(startOffsetMs); StartOffset = TimeSpan.FromMilliseconds(startOffsetMs);
EndOffset = StartOffset + TimeSpan.FromMilliseconds(lengthMs); EndOffset = StartOffset + TimeSpan.FromMilliseconds(lengthMs);
} }
public Chapter(string title, double startTimeSec, double endTimeSec)
:this(title, (long)(startTimeSec * 1000), (long)((endTimeSec - startTimeSec) * 1000))
{
}
public string ToFFMeta() public string ToFFMeta()
{ {