protected bool ExecuteFfMpegCommandLineExecutor(IExecuteVideoConversionWorkflowMessage message, string workingDirectory, string commandPath, string commandArguments, out string output)
{
var ffMpegCommandLineExecutor = new FfMpegCommandLineExecutor();
var cancellationTokenSource = new CancellationTokenSource();
var cancellationToken = cancellationTokenSource.Token;
var commandLineExecutorOutput = string.Empty;
var task = Task.Factory.StartNew(
() => ffMpegCommandLineExecutor.Execute(cancellationToken, workingDirectory, commandPath, commandArguments, out commandLineExecutorOutput)
, cancellationToken);
VideoConversionService.CommandLineExecutors.Add(message, new CancellableTask
{
Task = task,
CancellationTokenSource = cancellationTokenSource
});
try
{
var result = task.Result;
output = commandLineExecutorOutput;
return result;
}
finally
{
VideoConversionService.CommandLineExecutors.Remove(message);
}
}
public static VideoInfo GetVideoInfo(string commandPath, FileInfo videoFilePath, out string output)
{
var cancellationTokenSource = new CancellationTokenSource();
var cancellationToken = cancellationTokenSource.Token;
var helper = new FfMpegCommandLineExecutor();
var args = string.Format(@"-i ""{0}""", videoFilePath.FullName);
var workingDirectory = videoFilePath.DirectoryName;
if (!helper.Execute(cancellationToken, workingDirectory, commandPath, args, out output))
{
return null;
}
var videoInfo = new VideoInfo {FileName = videoFilePath.Name};
//Truncate all the beginning filling
output = output.Remove(0, output.LastIndexOf("Duration"));
const RegexOptions regexOptions = RegexOptions.Compiled | RegexOptions.IgnoreCase | RegexOptions.CultureInvariant |
RegexOptions.IgnorePatternWhitespace | RegexOptions.Multiline;
//Get duration and video bitrate
var durationRegex = new Regex(@"^.*Duration:\s([:.\d]*).*start\:\s([\d.]*).*bitrate\:\s([\d]*).*$", regexOptions);
var matchForDuration = durationRegex.Match(output);
if (matchForDuration.Success)
{
var durationString = matchForDuration.Groups[1].Value;
var startString = matchForDuration.Groups[2].Value;
var videoBitrateString = matchForDuration.Groups[3].Value;
var duration = TimeSpan.Zero;
TimeSpan.TryParse(durationString, out duration);
videoInfo.Duration = duration;
var start = double.MinValue;
double.TryParse(startString, out start);
videoInfo.Start = start;
var videoBitrate = int.MinValue;
int.TryParse(videoBitrateString, out videoBitrate);
videoInfo.VideoBitrate = videoBitrate;
}
//Get video stream information
var videoRegex = new Regex(@"^.*Stream\s\#\d\.\d.*\:\sVideo\:\s([^,]*),\s([^,]*),\s([\d]*)x([\d]*).*,\s([\d.]*).*$", regexOptions);
var matchForVideo = videoRegex.Match(output);
if (matchForVideo.Success)
{
var videoCodecString = matchForVideo.Groups[1].Value;
var colorEncodingMethodString = matchForVideo.Groups[2].Value;
var widthString = matchForVideo.Groups[3].Value;
var heightString = matchForVideo.Groups[4].Value;
var frameRateString = matchForVideo.Groups[5].Value;
videoInfo.VideoCodec = videoCodecString;
videoInfo.ColorEncodingMethod = colorEncodingMethodString;
var width = int.MinValue;
int.TryParse(widthString, out width);
videoInfo.Width = width;
var height = int.MinValue;
int.TryParse(heightString, out height);
videoInfo.Height = height;
var frameRate = double.MinValue;
double.TryParse(frameRateString, out frameRate);
videoInfo.FrameRate = frameRate;
}
//Get audio stream information
var audioRegex = new Regex(@"^.*Stream\s\#\d\.\d.*\:\sAudio\:\s([^,]*),\s([\d]*).*,\s(.*),\s([\d]*).*$", regexOptions);
var matchForAudio = audioRegex.Match(output);
if (matchForAudio.Success)
{
var audioCodecString = matchForAudio.Groups[1].Value;
var audioSamplingRateString = matchForAudio.Groups[2].Value;
var audioChannelsString = matchForAudio.Groups[3].Value;
var audioBitrateString = matchForAudio.Groups[4].Value;
videoInfo.AudioCodec = audioCodecString;
var audioSamplingRate = int.MinValue;
int.TryParse(audioSamplingRateString, out audioSamplingRate);
videoInfo.AudioSamplingRate = audioSamplingRate;
videoInfo.AudioChannels = audioChannelsString;
var audioBitrate = int.MinValue;
int.TryParse(audioBitrateString, out audioBitrate);
videoInfo.AudioBitrate = audioBitrate;
}
return videoInfo;
}
