public static VideoStream OpenFile(string fileName)
{
List<string> allEngines = TangraVideo.EnumVideoEngines().ToList();
var allEnginesByAttemptOrder = new List<string>(allEngines);
allEnginesByAttemptOrder.RemoveAt(TangraConfig.Settings.Generic.AviRenderingEngineIndex);
allEnginesByAttemptOrder.Insert(0, allEngines[TangraConfig.Settings.Generic.AviRenderingEngineIndex]);
Dictionary<int, string> allEnginesByIndex = allEnginesByAttemptOrder.ToDictionary(x => allEngines.IndexOf(x), x => x);
Exception lastError = null;
foreach (int engineIdx in allEnginesByIndex.Keys)
{
try
{
TangraVideo.SetVideoEngine(engineIdx);
VideoFileInfo fileInfo = TangraVideo.OpenFile(fileName);
TangraContext.Current.RenderingEngine = allEnginesByIndex[engineIdx];
var rv = new VideoStream(fileInfo, fileName);
// Try to load the first frame to be sure that it is going to work, before accepting this video engine for rendering
rv.GetPixelmap(fileInfo.FirstFrame);
UsageStats.Instance.ProcessedAviFiles++;
if (allEnginesByIndex[engineIdx] == "VideoForWindows")
UsageStats.Instance.VideoForWindowsUsed++;
else if (allEnginesByIndex[engineIdx] == "DirectShow")
UsageStats.Instance.DirectShowUsed++;
UsageStats.Instance.Save();
return rv;
}
catch (Exception ex)
{
lastError = ex;
}
}
throw new InvalidVideoFileException(lastError != null
? lastError.Message
: "None of the rendering engines was able to open the file.");
}
