/// <summary>
/// 获取某索引文件中指定时间点索引信息
/// </summary>
/// <param name="fileName">索引文件地址</param>
/// <param name="time">查找时间</param>
/// <returns>该索引文件中指定时间点的索引信息</returns>
public static IndexesPacket GetIndexesPacket(string fileName, DateTime time)
{
try
{
return(GetIndexesPackets(fileName).FirstOrDefault(_ => TimePeriodManager.IsValid(_, time)));
}
catch (Exception ex) {
Console.WriteLine(ex);
}
return(null);
}
/// <summary>
/// 获取某文件夹下某段时间内首个视频头文件
/// </summary>
/// <param name="folder">文件夹路径</param>
/// <param name="beginTime">起始时间</param>
/// <param name="endTime">结束时间</param>
/// <returns>视频头</returns>
public static StreamPacket GetVideoHeader(string folder, DateTime beginTime, DateTime endTime)
{
StreamPacket header = null;
string[] files = GetIndexesFiles(folder);
if (files.Length > 0)
{
TimePeriodPacket validTi = new TimePeriodPacket(beginTime, endTime);
TimePeriodPacket[] tis = FolderManager.GetTimePeriods(folder);
if (TimePeriodManager.GetIntersections(tis, validTi).Length != 0)
{
foreach (var file in files)
{
header = FileManager.GetVideoHeader(GlobalProcess.GetRecFileName(file));
if (header != null)
{
break;
}
}
}
}
return(header);
}
