private static void DisplayHero(PreviewAttribute attribute)
{
Console.WriteLine("Clipster running with the following arguments:");
Console.WriteLine("");
Console.WriteLine($" Begin capture at: {attribute.BeginSeconds} second(s)");
Console.WriteLine($" Desired Snippets: {attribute.DesiredSnippets}");
Console.WriteLine($" Output File: {attribute.Output}");
Console.WriteLine($" Snippet Length: {attribute.SnippetLengthInSeconds} second(s)");
Console.WriteLine($" Source File: {attribute.Source}");
Console.WriteLine($" Verbose Logging: {attribute.Verbose}");
Console.WriteLine($" Video Height: {attribute.VideoHeightInPixels} pixel(s)");
Console.WriteLine($" Video Width: {attribute.VideoWidthInPixels} pixel(s)");
Console.WriteLine("");
Console.WriteLine("");
}
static void Main(string[] args)
{
var builder = new ConfigurationBuilder()
.SetBasePath(Directory.GetCurrentDirectory())
.AddJsonFile("appsettings.json", optional: true, reloadOnChange: true)
.AddEnvironmentVariables();
IConfigurationRoot configuration = builder.Build();
var argDefaults = configuration.GetSection("ArgumentDefaults");
var valDefaults = configuration.GetSection("ValidatorDefaults");
var idx = args.Length > 0 ? Array.FindIndex(args, s => s.Equals("-s") || s.Equals("--source")) + 1 : -1;
var app = new CommandLineApplication();
app.HelpOption();
var optionSource = app.Option("-s|--source <Source>", "Source video file",
CommandOptionType.SingleValue)
.IsRequired()
.Accepts(v => v.ExistingFile());
var optionOutput = app.Option("-o|--output <Output>", "Output of the generated preview file",
CommandOptionType.SingleValue)
.Accepts(v => v.LegalFilePath());
if (idx > -1)
{
optionOutput.Validators.Add(new OutputFileValidator(args[idx]));
}
var optionBeginSeconds = app.Option("-b|--begin-seconds <Seconds>", $"When to start the preview - default {argDefaults["BEGIN_SECONDS"]} seconds",
CommandOptionType.SingleValue);
optionBeginSeconds.Validators.Add(new RangeValidator(int.Parse(valDefaults["BEGIN_SECONDS_LOWER"]), int.Parse(valDefaults["BEGIN_SECONDS_UPPER"])));
var optionLengthSeconds = app.Option("-l|--length-seconds <Seconds>", $"Length of snippet - default {argDefaults["LENGTH_SECONDS"]} seconds",
CommandOptionType.SingleValue);
optionLengthSeconds.Validators.Add(new RangeValidator(int.Parse(valDefaults["LENGTH_SECONDS_LOWER"]), int.Parse(valDefaults["LENGTH_SECONDS_UPPER"])));
var optionDesiredSnippets = app.Option("-d|--desired-snippets <Snippets>", $"Number of desired snippet - default {argDefaults["DESIRED_SNIPPETS"]} snippets",
CommandOptionType.SingleValue);
optionDesiredSnippets.Validators.Add(new RangeValidator(int.Parse(valDefaults["DESIRED_SNIPPETS_LOWER"]), int.Parse(valDefaults["DESIRED_SNIPPETS_UPPER"])));
var optionVideoHeight = app.Option("-h|--video-height <Pixels>", $"Video height dimension - default {argDefaults["VIDEO_HEIGHT"]} pixels",
CommandOptionType.SingleValue);
optionVideoHeight.Validators.Add(new RangeValidator(int.Parse(valDefaults["VIDEO_HEIGHT_LOWER"]), int.Parse(valDefaults["VIDEO_HEIGHT_UPPER"])));
var optionVideoWidth = app.Option("-w|--video-width <Pixels>", $"Video height dimension - default {argDefaults["VIDEO_WIDTH"]} pixels",
CommandOptionType.SingleValue);
optionVideoWidth.Validators.Add(new RangeValidator(int.Parse(valDefaults["VIDEO_WIDTH_LOWER"]), int.Parse(valDefaults["VIDEO_WIDTH_UPPER"])));
var optionVerbose = app.Option("-v|--verbose", "Level of logging",
CommandOptionType.NoValue);
app.OnExecute(() =>
{
var verbose = optionVerbose.HasValue();
var beginSeconds = optionBeginSeconds.HasValue()
? int.Parse(optionBeginSeconds.Value())
: int.Parse(argDefaults["BEGIN_SECONDS"]);
var lengthSeconds = optionLengthSeconds.HasValue()
? int.Parse(optionLengthSeconds.Value())
: int.Parse(argDefaults["LENGTH_SECONDS"]);
var desiredSnippets = optionDesiredSnippets.HasValue()
? int.Parse(optionDesiredSnippets.Value())
: int.Parse(argDefaults["DESIRED_SNIPPETS"]);
var videoHeight = optionVideoHeight.HasValue()
? int.Parse(optionVideoHeight.Value())
: int.Parse(argDefaults["VIDEO_HEIGHT"]);
var videoWidth = optionVideoWidth.HasValue()
? int.Parse(optionVideoWidth.Value())
: int.Parse(argDefaults["VIDEO_WIDTH"]);
var attribute = new PreviewAttribute()
{
Source = optionSource.Value(),
Output = optionOutput.Value(),
BeginSeconds = beginSeconds,
DesiredSnippets = desiredSnippets,
SnippetLengthInSeconds = lengthSeconds,
VideoHeightInPixels = videoHeight,
VideoWidthInPixels = videoWidth,
Verbose = verbose
};
PreviewEngine.Run(attribute);
});
app.Execute(args);
}
public static void Run(PreviewAttribute attribute)
{
SetWorkingDir(attribute.Source, attribute.Output);
DisplayHero(attribute);
double totalSeconds;
AspectRatio ratio;
GetVideoData(attribute.Source, out totalSeconds, out ratio);
// Get video length in seconds
var length = (int)Math.Round(totalSeconds, 0);
// Ensure the video is long enough to even bother previewing
var minLength = attribute.SnippetLengthInSeconds * attribute.DesiredSnippets;
// Display and check video length
if (length < minLength)
{
Console.WriteLine("Video is too short. Skipping");
Environment.Exit(0);
}
// Video dimension
var dimensions = ratio == AspectRatio.FullScreen
? @"(iw*sar)*min(427/(iw*sar)\,240/ih):ih*min(427/(iw*sar)\,240/ih), pad=427:240:(427-iw*min(427/iw\,240/ih))/2:(240-ih*min(427/iw\,240/ih))/2"
: "426x240";
var interval = ((length - attribute.BeginSeconds) / attribute.DesiredSnippets);
string arguments;
for (var i = 1; i <= attribute.DesiredSnippets; i++)
{
var start = ((i * interval) + attribute.BeginSeconds);
// only create snippet if the start time is not at the end of the video
// or if the start time + snippet length does not exceed the length of the video
if (start < length && start + attribute.SnippetLengthInSeconds <= length)
{
var formattedStart = string.Format("{0}:{1}:{2}",
(start / 3600).ToString("D2"),
((start % 3600) / 60).ToString("D2"),
(start % 60).ToString("D2"));
Console.WriteLine($"Generating preview part {i}{_outputFileExt} at {formattedStart}");
// Generating the snippet at calculated time
arguments = $@"-i {_sourceFile} -vf ""scale={dimensions}"" -an -preset fast -qmin 1 -qmax 1 -ss {
formattedStart} -t {attribute.SnippetLengthInSeconds} {_snippetsDir}\\{i}{_outputFileExt}";
RunVideoTool(arguments, attribute.Verbose);
}
}
// Concat videos
Console.WriteLine("Generating final preview file");
CreateListFile();
// Generate a text file with one snippet video location per line
// (https://trac.ffmpeg.org/wiki/Concatenate)
arguments = $@"-y -f concat -safe 0 -i {_listFile} -c copy {_outputFile}";
RunVideoTool(arguments, attribute.Verbose);
File.Copy(_outputFile, attribute.Output, true);
Console.WriteLine($"Clip creation completed! File is located at {attribute.Output}");
}