static void Main()
{
string[] outFile = new string[4];
string[] inFile =
{
"test_iOS_24b.jpg",
"test_iOS_24b_half.png",
"test_iOS_32b.png",
"test_iOS_32b_half.png"
};
string inDir = @"imgPre\";
string outDir = @"imgPostScale\";
string cropDir = @"imgPostCrop\";
image newImg = new image(0, 0);
image oldImg = new image(0, 0);
for (int i = 0; i < inFile.Length; i++)
{
outFile[i] = newSuffix(inFile[i]);
WriteLine(inDir + inFile[i]);
oldImg = getDimensions(inDir + inFile[i]);
WriteLine("old - w: {0:D4} :: h: {1:D4}", oldImg.width, oldImg.height);
newImg = calcNewSize(oldImg);
WriteLine("new - w: {0:D4} :: h: {1:D4}", newImg.width, newImg.height);
scaleNewFile(inDir + inFile[i], outDir + outFile[i], newImg);
cropNewFile(inDir + inFile[i], cropDir + outFile[i], newImg);
}
}
static void cropNewFile(string inFile, string outFile, image img)
{
var process = new Process();
string height = img.height.ToString();
string exe = "cmd.exe";
string cmd = $"/C ffmpeg -i {inFile} -vf \"scale=(iw*sar)*max({height}/(iw*sar)\\,{height}/ih):ih*max({height}/(iw*sar)\\,{height}/ih), crop=256:256\" {outFile}";
process.StartInfo.FileName = exe;
process.StartInfo.Arguments = cmd;
process.StartInfo.UseShellExecute = false;
process.StartInfo.RedirectStandardOutput = true;
process.StartInfo.RedirectStandardError = true;
process.StartInfo.CreateNoWindow = true;
process.Start();
process.WaitForExit((int)TimeSpan.FromSeconds(60).TotalMilliseconds);
WriteLine("Scale and Crop Success!");
// save to blob after this
}
static image calcNewSize(image input)
{
image output = new image(0, 0);
output.height = 256;
float scaleValue = (float)output.height / (float)input.height;
float width = (float)input.width * scaleValue;
output.width = (int)width;
if (output.width % 2 != 0)
{
output.width++;
}
while (output.width % 16 != 0)
{
output.width += 2;
}
return(output);
}
static image getDimensions(string inFile)
{
image imgOut = new image(0, 0);
var process = new Process();
string exe = "cmd.exe";
string cmd = $"/C ffprobe -v error -show_entries stream=width,height -of default=noprint_wrappers=1 {inFile}";
process.StartInfo.FileName = exe;
process.StartInfo.Arguments = cmd;
process.StartInfo.UseShellExecute = false;
process.StartInfo.RedirectStandardOutput = true;
process.Start();
StreamReader reader = process.StandardOutput;
string output = string.Empty;
string width = string.Empty;
string height = string.Empty;
int index = 0;
while ((output = reader.ReadLine()) != null)
{
if (output.Contains("width="))
{
index = output.LastIndexOf('=');
width = output.Substring(index + 1);
int.TryParse(width, out imgOut.width);
}
if (output.Contains("height="))
{
index = output.LastIndexOf('=');
height = output.Substring(index + 1);
int.TryParse(height, out imgOut.height);
}
}
process.WaitForExit((int)TimeSpan.FromSeconds(60).TotalMilliseconds);
return(imgOut);
}