public OutputPackage ConvertToFLV(MemoryStream inputFile, string filename)
{
string tempfile = Path.Combine(WorkingPath, Guid.NewGuid() + Path.GetExtension(filename));
FileStream fs = File.Create(tempfile);
inputFile.WriteTo(fs);
fs.Flush();
fs.Close();
GC.Collect();
var vf = new VideoFile(tempfile);
OutputPackage oo = ConvertToFLV(vf);
try
{
File.Delete(tempfile);
}
catch (Exception e)
{
Logger.SetLog(e);
}
return oo;
}
public void GetVideoInfo(VideoFile input)
{
//set up the parameters for video info
string Params = String.Format("-i \"{0}\"", input.Path);
string output = RunProcess(Params);
input.RawInfo = output;
//get duration
var re = new Regex("[D|d]uration:.((\\d|:|\\.)*)");
Match m = re.Match(input.RawInfo);
if (m.Success)
{
string duration = m.Groups[1].Value;
string[] timepieces = duration.Split(new[] { ':', '.' });
if (timepieces.Length == 4)
{
input.Duration = new TimeSpan(0, Convert.ToInt16(timepieces[0]), Convert.ToInt16(timepieces[1]), Convert.ToInt16(timepieces[2]), Convert.ToInt16(timepieces[3]));
}
}
//get audio bit rate
re = new Regex("[B|b]itrate:.((\\d|:)*)");
m = re.Match(input.RawInfo);
double kb = 0.0;
if (m.Success)
{
Double.TryParse(m.Groups[1].Value, out kb);
}
input.BitRate = kb;
//get the audio format
re = new Regex("[A|a]udio:.*");
m = re.Match(input.RawInfo);
if (m.Success)
{
input.AudioFormat = m.Value;
}
//get the video format
re = new Regex("[V|v]ideo:.*");
m = re.Match(input.RawInfo);
if (m.Success)
{
input.VideoFormat = m.Value;
}
//get the video format
re = new Regex("(\\d{2,3})x(\\d{2,3})");
m = re.Match(input.RawInfo);
if (m.Success)
{
int width; int height;
int.TryParse(m.Groups[1].Value, out width);
int.TryParse(m.Groups[2].Value, out height);
input.Width = width;
input.Height = height;
}
input.InfoGathered = true;
}
public OutputPackage ConvertToFLV(VideoFile input)
{
if (!input.InfoGathered)
{
GetVideoInfo(input);
}
var outputPackage = new OutputPackage();
//set up the parameters for getting a previewimage
string filename = Guid.NewGuid() + ".jpg";
//divide the duration in 3 to get a preview image in the middle of the clip
//instead of a black image from the beginning.
var secs = (int)Math.Round(TimeSpan.FromTicks(input.Duration.Ticks / 3).TotalSeconds, 0);
string finalpath = Path.Combine(WorkingPath, filename);
//These are the parameters for setting up a preview image that must be passed to ffmpeg.
//Note that we are asking for a jpeg image at our specified seconds.
string Params = String.Format("-i {0} {1} -vcodec mjpeg -ss {2} -vframes 1 -an -f rawvideo", input.Path, finalpath, secs);
string output = RunProcess(Params);
outputPackage.RawOutput = output;
//Ok, so hopefully we now have a preview file. If the file
//did not get created properly, try again at the first frame.
if (File.Exists(finalpath))
{
//load that file into our output package and attempt to delete the file
//since we no longer need it.
outputPackage.PreviewImage = LoadImageFromFile(finalpath);
try
{
File.Delete(finalpath);
}
catch (Exception e)
{
Logger.SetLog(e);
}
}
else
{
//try running again at frame 1 to get something
Params = String.Format("-i {0} {1} -vcodec mjpeg -ss {2} -vframes 1 -an -f rawvideo", input.Path, finalpath, 1);
output = RunProcess(Params);
outputPackage.RawOutput = output;
if (File.Exists(finalpath))
{
outputPackage.PreviewImage = LoadImageFromFile(finalpath);
try
{
File.Delete(finalpath);
}
catch (Exception e)
{
Logger.SetLog(e);
}
}
}
filename = Guid.NewGuid() + ".flv";
finalpath = Path.Combine(WorkingPath, filename);
//Now we are going to actually create the converted file. Note that we are asking for
//a video at 22khz 64bit. This can be changed by a couple quick alterations to this line,
//or by extending out this class to offer multiple different conversions.
Params = String.Format("-i {0} -y -ar 22050 -ab 64 -f flv {1}", input.Path, finalpath);
RunProcess(Params);
//Check to see if our conversion file exists and then load the converted
//file into our output package. If the file does exist and we are able to
//load it into our output package, we can delete the work file.
if (File.Exists(finalpath))
{
outputPackage.VideoStream = LoadMemoryStreamFromFile(finalpath);
try
{
File.Delete(finalpath);
}
catch (Exception e)
{
Logger.SetLog(e);
}
}
return outputPackage;
}
public VideoFile GetVideoInfo(string inputPath)
{
var vf = new VideoFile(inputPath);
GetVideoInfo(vf);
return vf;
}
public OutputPackage ConvertToFLV(string inputPath)
{
var vf = new VideoFile(inputPath);
OutputPackage oo = ConvertToFLV(vf);
return oo;
}
