private static int RunExtractAndReturnExitCode(LaunchOptions.Extract opts)
{
Quite = opts.Quite;
using var flv_stream = File.Open(opts.InputPath, FileMode.Open, FileAccess.Read, FileShare.Read);
var tags = FlvReader.ReadFlvFile(flv_stream, opts.TagNum + 1);
if (tags.Length > opts.TagNum)
{
FlvTag tag = tags[opts.TagNum];
if (string.IsNullOrWhiteSpace(opts.OutputPath))
{
var s = new MemoryStream();
if (tag.TagType == TagType.Script && !opts.Byte)
{
FlvWriter.WriteTagData(s, flv_stream, tag);
s.Position = 0;
var body = ScriptTagBody.Parse(s);
Console.WriteLine(body.ToJson());
}
else
{
FlvWriter.WriteTag(s, flv_stream, tag);
var str = BitConverter.ToString(s.ToArray()).Replace("-", "");
str = string.Join('\n', str.SplitInParts(64));
Console.WriteLine(str);
}
return(0);
}
else
{
var fi = new FileInfo(opts.OutputPath);
if (fi.Exists && !opts.Overwrite)
{
if (!Quite)
{
Console.WriteLine("文件已经存在，使用 --force 参数覆盖目标位置文件");
}
return(1);
}
using var output = fi.Open(FileMode.Create, FileAccess.ReadWrite, FileShare.Read);
FlvWriter.WriteTag(output, flv_stream, tag);
return(0);
}
}
else
{
if (!Quite)
{
Console.WriteLine($"文件中只有个 {tags.Length} Tag，而需要第 {opts.TagNum} 个 Tag");
}
return(1);
}
}
private static int RunParseAndReturnExitCode(LaunchOptions.Parse opts)
{
Quite = opts.Quite;
var input = new FileInfo(opts.InputPath);
if (!input.Exists)
{
if (!Quite)
{
Console.WriteLine("FLV 文件不存在");
}
return(1);
}
var fib = new FileInfo(opts.FibPath);
if (fib.Exists && !opts.Overwrite)
{
if (!Quite)
{
Console.WriteLine("fib 文件已经存在，使用 --force 参数覆盖目标位置文件");
}
return(1);
}
using var flv_stream = input.Open(FileMode.Open, FileAccess.Read, FileShare.Read);
if (!Quite)
{
Console.WriteLine("读取 FLV 文件中...");
}
string hash;
if (opts.SkipHash)
{
hash = string.Empty;
}
else
{
using var md5 = MD5.Create();
var bytes = md5.ComputeHash(flv_stream);
flv_stream.Position = 0;
hash = BitConverter.ToString(bytes).Replace("-", "").ToLowerInvariant();
}
var tags = FlvReader.ReadFlvFile(flv_stream);
if (!Quite)
{
Console.WriteLine("FLV 文件读取完毕，生成 fib 命令文件...");
}
var file = new FlvInteractiveRebaseCommandFile
{
File = new FlvInteractiveRebaseCommandFile.FlvFile
{
Hash = hash,
SkipHash = opts.SkipHash,
Path = input.FullName
}
};
int index = 0;
var memoryStream = new MemoryStream();
file.Tags.AddRange(tags.Select(input_tag =>
{
FlvInteractiveRebaseCommandFile.FlvTag result;
if (input_tag.TagType == TagType.Script)
{
memoryStream.SetLength(0);
FlvWriter.WriteTagData(memoryStream, flv_stream, input_tag);
memoryStream.Position = 0;
var body = ScriptTagBody.Parse(memoryStream);
var json = body.ToJson();
result = new FlvInteractiveRebaseCommandFile.FlvTag
{
Command = FlvInteractiveRebaseCommandFile.FlvTagCommand.Script,
Index = index++,
TimeStamp = TimeSpan.FromMilliseconds(input_tag.TimeStamp),
Value = json,
Size = input_tag.TagSize,
Offset = input_tag.Position,
Type = input_tag.TagType,
Header = input_tag.Flag.HasFlag(TagFlag.Header),
Keyframe = input_tag.Flag.HasFlag(TagFlag.Keyframe),
};
}
else
{
result = new FlvInteractiveRebaseCommandFile.FlvTag
{
Command = FlvInteractiveRebaseCommandFile.FlvTagCommand.Pick,
Index = index++,
TimeStamp = TimeSpan.FromMilliseconds(input_tag.TimeStamp),
Size = input_tag.TagSize,
Offset = input_tag.Position,
Type = input_tag.TagType,
Header = input_tag.Flag.HasFlag(TagFlag.Header),
Keyframe = input_tag.Flag.HasFlag(TagFlag.Keyframe),
};
}
if (result.Type == TagType.Video && opts.ShowNalu)
{
var b = new byte[4];
flv_stream.Seek(result.Offset + 11, SeekOrigin.Begin);
if ((flv_stream.ReadByte() & 0x0F) == 7 && flv_stream.ReadByte() == 1)
{
result.Nalus = new List <FlvInteractiveRebaseCommandFile.FlvNalu>();
var end = result.Offset + 11 + result.Size;
flv_stream.Seek(3, SeekOrigin.Current);
while (true)
{
if (4 != flv_stream.Read(b))
{
break;
}
var size = BitConverter.ToUInt32(b.ToBE(), 0);
var type = flv_stream.ReadByte() & 0b00011111;
flv_stream.Seek(size - 1, SeekOrigin.Current);
result.Nalus.Add(new FlvInteractiveRebaseCommandFile.FlvNalu {
Size = size, Type = type
});
if (flv_stream.Position == end)
{
break;
}
else if (flv_stream.Position > end)
{
Console.WriteLine($"Nalu Warning: out of range. Offset: {result.Offset}, Nalu No: {result.Nalus.Count + 1}, Pos: {flv_stream.Position}");
break;
}
}
}
}
return(result);
}));
using (var writer = new StreamWriter(fib.Open(FileMode.Create, FileAccess.ReadWrite, FileShare.None), new UTF8Encoding(false)))
{
FlvInteractiveRebaseCommandFile.Serialize(writer, file);
}
if (!Quite)
{
Console.WriteLine("成功生成");
}
return(0);
}