private (EntryFlags err, List <byte[]>?) GetVideoThumbnailAsBitmaps(VideoFileEntry videoFile, List <float> positions)
{
var ffMpeg = new FFmpegWrapper.FFmpegWrapper();
var images = new List <byte[]>();
try {
for (var i = 0; i < positions.Count; i++)
{
var b = ffMpeg.GetVideoThumbnail(videoFile.Path, Convert.ToSingle(videoFile.mediaInfo?.Duration.TotalSeconds * positionList[i]), true);
if (b == null || b.Length == 0)
{
return(EntryFlags.ThumbnailError, null);
}
var d = ExtensionMethods.VerifyGrayScaleValues(b);
if (d == null)
{
return(EntryFlags.TooDark, null);
}
images.Add(d);
}
}
catch (FFmpegWrapper.FFMpegException ex) {
Logger.Instance.Info($"FFMpegException, file: {videoFile.Path}, reason: {ex.Message}");
return(EntryFlags.ThumbnailError, null);
}
return(0, images);
}
private List <Image>?GetVideoThumbnail(DuplicateItem videoFile, List <float> positions)
{
var ffMpeg = new FFmpegWrapper.FFmpegWrapper();
var images = new List <Image>();
try {
for (var i = 0; i < positions.Count; i++)
{
var b = ffMpeg.GetVideoThumbnail(videoFile.Path, Convert.ToSingle(videoFile.Duration.TotalSeconds * positionList[i]), false);
if (b == null || b.Length == 0)
{
return(null);
}
using var byteStream = new MemoryStream(b);
var bitmapImage = Image.FromStream(byteStream);
images.Add(bitmapImage);
}
}
catch (FFmpegWrapper.FFMpegException ex) {
Logger.Instance.Info($"FFMpegException, file: {videoFile.Path}, reason: {ex.Message}");
return(null);
}
catch (Exception ex) {
Logger.Instance.Info($"Exception, file: {videoFile.Path}, reason: {ex.Message}, stacktrace {ex.StackTrace}");
return(null);
}
return(images);
}