private void ParseOutputStream(Stream stdoutStream, Reference <WebTranscodingInfo> data, long startPosition, bool logProgress) { StreamReader reader = new StreamReader(stdoutStream); TranscodingInfoCalculator calculator = new TranscodingInfoCalculator(position, 25, 500, info.Duration); //VLCWrapper prints twice a second string line; try { while ((line = reader.ReadLine()) != null) { try { Log.Trace("VLCWrapperParsing: read line {0}", line); // just for debugging of the wrapper tool if (line.StartsWith("A") || line.StartsWith("I") || line == "S started" || line == "S null") { continue; } // propagate start event to Start() method if (line == "S playing") { vlcIsStarted = true; continue; } // events if (line == "S error") { vlcIsStarted = true; data.Value.Finished = true; data.Value.Failed = true; break; } if (line == "S finished") { data.Value.Finished = true; continue; } // the actual progress parsing if (line.StartsWith("P")) { // Starting with VLCWrapper 0.2, the output format has changed. It is 'P [time in milliseconds]' now, which is quite easy for // us to handle. With VLC 2 it also returns the time as a 64-bit integer, so we don't have overflow anymore either, but that risk // is with milliseconds quite small anyhow: it requires 596 hours of video. long milliseconds = Int64.Parse(line.Substring(2)); calculator.NewTime((int)milliseconds); calculator.SaveStats(data); continue; } Log.Warn("VLCWrapperParsing: encountered unknown line {0}", line); } catch (ThreadAbortException) { data.Value.Finished = true; reader.Close(); return; } catch (Exception e) { Log.Error("Failure during parsing of VLC output", e); } } } catch (ThreadAbortException) { // The double try-catch is to make sure that the parsing doesn't stop when it can't process a single line, but that we don't // log too much noise when a ThreadAbortException occurs while in the ReadLine() method. Funnily enough, this exception is // rethrown when we leave the catch block, so duplicate some code from below... data.Value.Finished = true; reader.Close(); return; } data.Value.Finished = true; reader.Close(); }