public void CreateThumbnail(
ThumbnailSheetCreateRequest request,
Response response,
TimeSpan currentPointInVideo,
string outputFilepath)
{
var arguments = $"-i \"{request.VideoPath}\" -ss {currentPointInVideo} -vframes 1 {outputFilepath}";
var app = new CommandLineApplication();
var result = app.Run(_config.FfmpegPath, arguments);
var errorInfo = result.ErrorData.Trim();
// Success means that the thumbnail is created.
if (File.Exists(outputFilepath))
{
return;
}
// lock is requried because we are accessing the response properties on more than one thread
lock (Lock)
{
response.FfmpegArguments = arguments;
response.FfmpegErrorOutput = errorInfo;
throw new HqvException($"No thumbnail created using ffmpeg for {outputFilepath}");
}
}
private void AddTimeStamps(ThumbnailSheetCreateRequest request, List <ThumbnailInfo> thumbnailsSettings)
{
Parallel.ForEach(thumbnailsSettings, thumbnailsSetting =>
{
_timeStamper.Stamp(request, thumbnailsSetting.OutputFilepath, thumbnailsSetting.PointInVideo);
});
}
public void CreateThumbnails(ThumbnailSheetCreateRequest request, Response response)
{
_request = request;
_response = response;
var secondPerThumbnail = request.VideoDurationInSeconds / request.NumberOfThumbnails;
var timespanToAdd = TimeSpan.FromSeconds(secondPerThumbnail);
// start at the halfway point from beginning and timespan to add. Should give us good thumbnails
var currentPointInVideo = TimeSpan.FromSeconds(secondPerThumbnail / 2);
var thumbnailsSettings = new List <ThumbnailInfo>();
for (var currentThumbnailNumber = 1; currentThumbnailNumber <= request.NumberOfThumbnails; ++currentThumbnailNumber)
{
var outputFilepath = $"{_config.TempThumbnailPath}\\thumbnail-{currentThumbnailNumber:D3}.png";
thumbnailsSettings.Add(new ThumbnailInfo(outputFilepath, currentPointInVideo));
currentPointInVideo = currentPointInVideo.Add(timespanToAdd);
}
Parallel.ForEach(thumbnailsSettings, thumbnailsSetting =>
{
var tc = new FfmpegThumbnailCreatorExactLocation(_config);
tc.CreateThumbnail(_request, _response, thumbnailsSetting.PointInVideo, thumbnailsSetting.OutputFilepath);
});
if (request.ShouldAddTimestamps)
{
AddTimeStamps(request, thumbnailsSettings);
}
}
public void CreateSheet(ThumbnailSheetCreateRequest request, Response response)
{
using (var images = new MagickImageCollection())
{
CreateSheet(request, response, images);
}
}
private void CreateTry(ThumbnailSheetCreateRequest request)
{
ValidateRequest(request);
CleanupTempFolder();
_thumbnailCreator.CreateThumbnails(request, _response);
_sheetCreator.CreateSheet(request, _response);
CleanupTempFolder();
}
private void GivenAValidRequest()
{
_request = new ThumbnailSheetCreateRequest(
videoPath: @"C:\Workspace\media-tools-space\test-files\JLT.mp4",
sheetName: "JLT",
numberOfThumbnails: 16,
videoDurationInSeconds: 152,
sheetQuality: 80,
sheetTitleFontSize: 12,
thumbnailWidth: 320);
}
private static void ValidateRequest(ThumbnailSheetCreateRequest request)
{
var validator = new ThumbnailSheetCreateRequestValidator();
var validationResult = validator.Validate(request);
if (validationResult.IsValid)
{
return;
}
var exception = new HqvException("Validation on request failed");
exception.Data["errors"] = validationResult.Errors;
throw exception;
}
/// <inheritdoc />
/// <summary>
/// Create a thumbnail sheet
/// </summary>
/// <param name="request">Request</param>
/// <returns>Response</returns>
public ThumbnailSheetCreateResponse Create(ThumbnailSheetCreateRequest request)
{
_response = new Response(request);
try
{
CreateTry(request);
}
catch (HqvException ex)
{
_response.AddError(ex);
}
catch (Exception ex)
{
const string message = "Unhandled exception in ThumbnailSheetCreationService";
_response.AddError(new Exception(message, ex));
}
return(_response);
}
private ThumbnailSheetCreateResponse CreateThumbnailSheet(CreateThumbnailSheetOptions options, VideoFileInformationModel videoFileInformation)
{
var request = new ThumbnailSheetCreateRequest(
videoPath: options.VideoFilePath,
sheetName: Path.GetFileNameWithoutExtension(options.VideoFilePath),
numberOfThumbnails: options.NumberOfThumbnails,
videoDurationInSeconds: videoFileInformation.DurationInSecs,
correlationId: _correlationId);
var response = _thumbnailSheetCreationService.Create(request);
if (response.IsValid)
{
_auditor.AuditSuccess("VideoFile", options.VideoFilePath, "ThumbnailSheetCreated", response);
}
else
{
_auditor.AuditFailure("VideoFile", options.VideoFilePath, "ThumbnailSheetCreationFailed", response);
}
return(response);
}
public void Stamp(ThumbnailSheetCreateRequest request, string filePath, TimeSpan time)
{
var stampText = time.ToString(request.VideoDurationInSeconds >= 3600 ? @"hh\:mm\:ss" : @"mm\:ss");
var tempFilePath = filePath + ".tmp.png";
using (var imgText = new MagickImage(filePath))
{
var drawable = new DrawableText(5, 5, stampText);
var gravity = new DrawableGravity(Gravity.Southeast);
var font = new DrawableFont("Tahoma");
var antialias = new DrawableTextAntialias(true);
var size = new DrawableFontPointSize(48);
var color = new DrawableFillColor(MagickColors.Black);
var strokecolor = new DrawableStrokeColor(MagickColors.AliceBlue);
imgText.Draw(drawable, gravity, font, antialias, size, color, strokecolor);
imgText.Write(tempFilePath);
}
File.Delete(filePath);
File.Move(tempFilePath, filePath);
}
private void CreateSheet(ThumbnailSheetCreateRequest request, Response response, IMagickImageCollection images)
{
int tempWidth = 0, tempHeight = 0;
var files = Directory.GetFiles(_config.TempThumbnailPath, "thumbnail*.png").OrderBy(x => x).ToList();
foreach (var file in files)
{
var image = new MagickImage(file);
tempWidth = image.Width;
tempHeight = image.Height;
images.Add(image);
}
var conversionNumber = tempWidth / request.ThumbnailWidth;
tempHeight = tempHeight / conversionNumber;
var montageSetting = new MontageSettings
{
Geometry = new MagickGeometry(request.ThumbnailWidth, tempHeight),
TileGeometry = new MagickGeometry(GetTileGeometry(files.Count)),
BackgroundColor = MagickColors.Black,
BorderColor = MagickColors.DarkGray,
BorderWidth = 1,
Font = "Arial",
FontPointsize = request.SheetTitleFontSize,
FillColor = MagickColors.LightGray,
StrokeColor = MagickColors.WhiteSmoke,
Title = request.SheetName
};
using (var montage = images.Montage(montageSetting))
{
var path = Path.Combine(_config.ThumbnailSheetPath, request.SheetName + "-sheet.jpg");
montage.Format = MagickFormat.Jpeg;
montage.Quality = request.SheetQuality;
montage.Write(path);
response.SheetFilePath = path;
}
}
public Response(ThumbnailSheetCreateRequest request) : base(request)
{
}
