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MainForm.cs
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MainForm.cs
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using System;
using System.Drawing;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Text.RegularExpressions;
using System.Windows.Forms;
namespace WebMConverter
{
public partial class MainForm : Form
{
private string _template;
private string _templateArguments;
private string _autoOutput;
private string _autoTitle;
private string _autoArguments;
private bool _argumentError;
public Size AssumedInputSize; //This will get set as soon as the crop form generates an input file. It's assumed because the user could've changed the video after cropping.
//Might want to get a definite, reliable way to get the size of the input video.
public RectangleF CroppingRectangle //This is in the [0-1] region, multiply it by the resolution to get the crop coordinates in pixels
{
get { return _croppingRectangle; }
set
{
_croppingRectangle = value;
if (_croppingRectangle == CropForm.FullCrop)
labelCrop.Text = "Don't crop";
else
labelCrop.Text = string.Format(CultureInfo.InvariantCulture, "X:{0:0%} Y:{1:0%} W:{2:0%} H:{3:0%}",
_croppingRectangle.X,
_croppingRectangle.Y,
_croppingRectangle.Width,
_croppingRectangle.Height);
}
}
private RectangleF _croppingRectangle; //Using a backing field so we can update the label as soon as something changed it!
//public RectangleF CroppingRectangle; //This is in the [0-1] region, multiply it by the resolution to get the crop coordinates in pixels
public MainForm()
{
InitializeComponent();
CroppingRectangle = new RectangleF(0, 0, 1, 1); //Crop nothing by default
AllowDrop = true;
DragEnter += HandleDragEnter;
DragDrop += HandleDragDrop;
_templateArguments = "{0} -c:v libvpx -crf 32 -b:v {1}K {2} {3} -threads {4} {5} {6} {7}";
//{0} is '-an' if no audio, otherwise blank
//{1} is bitrate in kb/s
//{2} is '-vf scale=WIDTH:HEIGHT' if set otherwise blank
//{3} is '-filter:v "crop=out_w:out_h:x:y"' if set otherwise blank
//{4} is amount of threads to use
//{5} is '-fs XM' if X MB limit enabled otherwise blank
//{6} is '-metadata title="TITLE"' when specifying a title, otherwise blank
//{7} is '-quality best -lag-in-frames 16' when using HQ mode, otherwise blank
//TODO: add an option for subtitles. It's either '-vf "ass=subtitle.ass"' or '-vf subtitles=subtitle.srt'
_template = "{2} -i \"{0}\" {3} {4} {5} {6} -f webm -y \"{1}\"";
//{0} is input file
//{1} is output file
//{2} is TIME if seek enabled otherwise blank
//{3} is TIME if to enabled otherwise blank
//{4} is extra arguments
//{5} is '-pass X' if 2-pass enabled, otherwise blank
//{6} is '-auto-alt-ref 1' is 2-pass enabled AND HQ mode enabled, otherwise blank
}
private void MainForm_Load(object sender, EventArgs e)
{
//Keeping this disabled for now because threads are crashy
//int threads = Environment.ProcessorCount; //Set thread slider to default of 4
//trackThreads.Value = Math.Min(trackThreads.Maximum, Math.Max(trackThreads.Minimum, threads));
trackThreads_Scroll(sender, e); //Update label
}
private void buttonBrowseIn_Click(object sender, EventArgs e)
{
using (OpenFileDialog dialog = new OpenFileDialog())
{
dialog.CheckFileExists = true;
dialog.CheckPathExists = true;
dialog.ValidateNames = true;
if (dialog.ShowDialog() == DialogResult.OK && !string.IsNullOrWhiteSpace(dialog.FileName))
SetFile(dialog.FileName);
}
}
private void SetFile(string path)
{
textBoxIn.Text = path;
string fullPath = Path.GetDirectoryName(path);
string name = Path.GetFileNameWithoutExtension(path);
if (boxMetadataTitle.Text == _autoTitle || boxMetadataTitle.Text == "")
boxMetadataTitle.Text = _autoTitle = name;
if (textBoxOut.Text == _autoOutput || textBoxOut.Text == "")
textBoxOut.Text = _autoOutput = Path.Combine(fullPath, name + ".webm");
}
private void HandleDragEnter(object sender, DragEventArgs e)
{
// show copy cursor for files
bool dataPresent = e.Data.GetDataPresent(DataFormats.FileDrop);
e.Effect = dataPresent ? DragDropEffects.Copy : DragDropEffects.None;
}
private void HandleDragDrop(object sender, DragEventArgs e)
{
string[] files = (string[])e.Data.GetData(DataFormats.FileDrop);
foreach (string file in files) SetFile(file);
}
private void buttonBrowseOut_Click(object sender, EventArgs e)
{
using (SaveFileDialog dialog = new SaveFileDialog())
{
dialog.OverwritePrompt = true;
dialog.ValidateNames = true;
dialog.Filter = "WebM files|*.webm";
if (dialog.ShowDialog() == DialogResult.OK && !string.IsNullOrWhiteSpace(dialog.FileName))
textBoxOut.Text = dialog.FileName;
}
}
private void buttonGo_Click(object sender, EventArgs e)
{
string result = Convert();
if (!string.IsNullOrWhiteSpace(result))
MessageBox.Show(result, "ERROR", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
char[] invalidChars = Path.GetInvalidPathChars();
private string Convert()
{
string input = textBoxIn.Text;
string output = textBoxOut.Text;
if (string.IsNullOrWhiteSpace(input))
return "No input file!";
if (string.IsNullOrWhiteSpace(output))
return "No output file!";
if (invalidChars.Any(input.Contains))
return "Input path contains invalid characters!\nInvalid characters: " + string.Join(" ", invalidChars);
if (invalidChars.Any(output.Contains))
return "Output path contains invalid characters!\nInvalid characters: " + string.Join(" ", invalidChars);
if (!File.Exists(input))
return "Input file doesn't exist!";
if (input == output)
return "Input and output files are the same!";
float startSeconds, endSeconds;
try
{
startSeconds = ParseTime(boxCropFrom.Text);
}
catch (ArgumentException)
{
return "Invalid start crop time!";
}
try
{
endSeconds = ParseTime(boxCropTo.Text);
}
catch (ArgumentException)
{
return "Invalid end crop time!";
}
string options = textBoxArguments.Text;
try
{
if (options.Trim() == "" || _argumentError)
options = GenerateArguments();
}
catch (ArgumentException e)
{
return e.Message;
}
string start = "";
string end = "";
if (startSeconds != 0.0)
{
start = "-ss " + startSeconds.ToString(CultureInfo.InvariantCulture); //Convert comma to dot
}
float duration = 0;
if (endSeconds != 0.0)
{
duration = endSeconds - startSeconds;
if (duration <= 0)
return "Video is 0 or less seconds long!";
end = "-to " + duration.ToString(CultureInfo.InvariantCulture); //Convert comma to dot
}
string[] arguments;
if (!checkBox2Pass.Checked)
arguments = new[] { string.Format(_template, input, output, start, end, options, "", "") };
else
{
int passes = 2; //Can you even use more than 2 passes?
string HQ = "";
if (boxHQ.Checked)
HQ = "-auto-alt-ref 1"; //This should improve quality, only in 2-pass mode
arguments = new string[passes];
for (int i = 0; i < passes; i++)
arguments[i] = string.Format(_template, input, output, start, end, options, "-pass " + (i + 1), HQ);
}
var form = new ConverterForm(this, arguments);
form.ShowDialog();
return null;
}
public static float ParseTime(string text)
{
//Try fo figure out if begin/end are correct
//1. if it contains a :, it's probably a time, try to convert using DateTime.Parse
//2. if not, try int.tryparse
if (!string.IsNullOrWhiteSpace(text))
{
if (text.Contains(":"))
{
TimeSpan time;
if (!TimeSpan.TryParse(MakeParseFriendly(text), CultureInfo.InvariantCulture, out time))
throw new ArgumentException("Invalid time!");
return (float)time.TotalSeconds;
}
else
{
float time;
if (!float.TryParse(text, NumberStyles.Float, CultureInfo.InvariantCulture, out time))
throw new ArgumentException("Invalid time!");
return time;
}
}
return 0.0f;
}
private void UpdateArguments(object sender, EventArgs e)
{
try
{
string arguments = GenerateArguments();
if (arguments != _autoArguments || _argumentError)
{
textBoxArguments.Text = _autoArguments = arguments;
_argumentError = false;
}
}
catch (ArgumentException argExc)
{
textBoxArguments.Text = "ERROR: " + argExc.Message;
_argumentError = true;
}
}
private string GenerateArguments()
{
string args = "";
int width = 0;
int height = 0;
if (!string.IsNullOrWhiteSpace(boxResW.Text) || !string.IsNullOrWhiteSpace(boxResH.Text))
{
if (!int.TryParse(boxResW.Text, out width))
throw new ArgumentException("Invalid width!");
if (!int.TryParse(boxResH.Text, out height))
throw new ArgumentException("Invalid height!");
}
if ((!string.IsNullOrWhiteSpace(boxResW.Text) && string.IsNullOrWhiteSpace(boxResH.Text)) ||
(string.IsNullOrWhiteSpace(boxResW.Text) && !string.IsNullOrWhiteSpace(boxResH.Text)))
throw new ArgumentException("One of the width/height fields isn't filled in! Either fill none of them, or both of them!");
string sizeCrop = "";
if (_croppingRectangle != CropForm.FullCrop)
{
//Okay so here's the plan
//1. Get the width of the video. If this is -1, you need to get the aspect ratio of the video somehow and then calculate the width from the height
//2. Get the height of the video. If this is -1, you need to get the aspect ratio of the video somehowand then calculate the height from the width
//If you can't get them, disallow the use of -1 if you're cropping the video at all!
//3. If they are both filled in, you're in luck. Now you can calculate the pixel values for all 4 parameters for the crop.
int assumedWidth = width;
int assumedHeight = height;
if (width == -1 || height == -1) //TODO: allow this
throw new ArgumentException("Sorry, but you can't crop while using -1 in one of the resolution fields.");
if (width == 0 || height == 0)
{
//The AssumedInputSize is the size of the last preview image generated while using the cropping tool.
//It's a good assumption, unless the user changes the input video after cropping.
assumedWidth = AssumedInputSize.Width;
assumedHeight = AssumedInputSize.Height;
if (assumedWidth == 0 || assumedHeight == 0)
throw new ArgumentException("For some reason you've cropped without generating a preview image.");
}
int cropX = (int)(assumedWidth * _croppingRectangle.X);
int cropY = (int)(assumedHeight * _croppingRectangle.Y);
int cropW = (int)(assumedWidth * _croppingRectangle.Width);
int cropH = (int)(assumedHeight * _croppingRectangle.Height);
sizeCrop = string.Format("-filter:v crop=\"{0}:{1}:{2}:{3}\"", cropW, cropH, cropX, cropY);
}
float startSeconds = ParseTime(boxCropFrom.Text);
float duration = 0;
float endSeconds = ParseTime(boxCropTo.Text);
if (endSeconds != 0.0)
{
duration = endSeconds - startSeconds;
if (duration <= 0)
throw new ArgumentException("Video is 0 or less seconds long!");
}
float limit = 0;
string limitTo = "";
if (!string.IsNullOrWhiteSpace(boxLimit.Text))
{
if (!float.TryParse(boxLimit.Text, out limit))
throw new ArgumentException("Invalid size limit!");
limitTo = string.Format("-fs {0}M", limit.ToString(CultureInfo.InvariantCulture)); //Should turn comma into dot
}
string size = "";
if (width != 0 && height != 0)
size = string.Format("-vf scale={0}:{1}", width, height);
//Calculate bitrate yourself!
//1 megabyte = 8192 kilobits
//3 megabytes = 24576 kilobits -> this is the limit
//So if you have 60 seconds, the bitrate should be...
//24576/60 = 409.6 kilobits/sec
int bitrate = 900;
if (duration != 0 && limit != 0)
{
bitrate = (int)(8192 * limit / duration);
}
if (!string.IsNullOrWhiteSpace(boxBitrate.Text))
if (!int.TryParse(boxBitrate.Text, out bitrate))
throw new ArgumentException("Invalid bitrate!");
int threads = trackThreads.Value;
string metadataTitle = "";
if (!string.IsNullOrWhiteSpace(boxMetadataTitle.Text))
metadataTitle = string.Format("-metadata title=\"{0}\"", boxMetadataTitle.Text.Replace("\"", "\\\""));
string HQ = "";
if (boxHQ.Checked)
HQ = "-quality best -lag-in-frames 16";
string audioEnabled = boxAudio.Checked ? "" : "-an"; //-an if no audio
return string.Format(_templateArguments, audioEnabled, bitrate, size, sizeCrop, threads, limitTo, metadataTitle, HQ);
}
private static string MakeParseFriendly(string text)
{
//This method adds "00:" in front of text, if the text format is in either 00:00 or 00:00.00 format.
//This pattern should work.
string pattern = @"^[0-5][0-9]:[0-5][0-9](\.[0-9]+)?$";
Regex regex = new Regex(pattern, RegexOptions.Singleline);
if (regex.IsMatch(text))
return "00:" + text;
return text;
}
private void trackThreads_Scroll(object sender, EventArgs e)
{
labelThreads.Text = trackThreads.Value.ToString();
UpdateArguments(sender, e);
}
private void buttonOpenCrop_Click(object sender, EventArgs e)
{
new CropForm(this).ShowDialog();
UpdateArguments(sender, e);
}
}
}