/// <summary>
/// The stream of the thumbnail file - computed once and cached in ThumbnailData
/// </summary>
public byte[] ThumbnailBytes()
{
if (m_ThumbBytes != null)
{
return(m_ThumbBytes);
}
using (Stream s = GetInputStream())
{
string szTempFile = null;
try
{
using (System.Drawing.Image image = MFBImageInfo.DrawingCompatibleImageFromStream(s, out szTempFile))
{
Info inf = MFBImageInfo.InfoFromImage(image);
using (Bitmap bmp = MFBImageInfo.BitmapFromImage(inf.Image, MFBImageInfo.ThumbnailHeight, MFBImageInfo.ThumbnailWidth))
{
using (MemoryStream sOut = new MemoryStream())
{
bmp.Save(sOut, ImageFormat.Jpeg);
m_ThumbBytes = sOut.ToArray();
}
}
}
}
finally
{
if (!String.IsNullOrEmpty(szTempFile) && File.Exists(szTempFile))
{
File.Delete(szTempFile);
}
}
}
return(m_ThumbBytes);
}
/// <summary>
/// Creates the thumbnail from a completed video process. Sets the width/height in the process.
/// </summary>
/// <param name="szBasePath">The base path for the video object</param>
/// <param name="szPhysicalPath">The filename to use for the resulting thumbnail image</param>
public void InitThumbnail(string szBasePath, string szPhysicalPath)
{
if (szBasePath == null)
{
throw new ArgumentNullException(nameof(szBasePath));
}
string szThumbFile = String.Format(CultureInfo.InvariantCulture, "{0}{1}00001{2}", MFBImageInfo.ThumbnailPrefixVideo, GUID, FileExtensions.JPG);
if (szBasePath.StartsWith("/", StringComparison.Ordinal))
{
szBasePath = szBasePath.Substring(1);
}
string srcFile = szBasePath + szThumbFile;
// Copy the thumbnail over
using (IAmazonS3 s3 = AWSConfiguration.S3Client())
{
try
{
using (GetObjectResponse gor = s3.GetObject(new GetObjectRequest()
{
BucketName = Bucket, Key = srcFile
}))
{
if (gor != null && gor.ResponseStream != null)
{
#pragma warning disable IDISP007 // Don't dispose injected
// Amazon documents EXPLICITLY say we should wrap in a using block. See https://docs.aws.amazon.com/sdkfornet1/latest/apidocs/html/P_Amazon_S3_Model_S3Response_ResponseStream.htm
using (gor.ResponseStream)
#pragma warning restore IDISP007 // Don't dispose injected.
{
using (System.Drawing.Image image = MFBImageInfo.DrawingCompatibleImageFromStream(gor.ResponseStream))
{
Info inf = MFBImageInfo.InfoFromImage(image);
// save the thumbnail locally.
inf.ImageDescription = Comment;
Bitmap bmp = MFBImageInfo.BitmapFromImage(inf.Image, MFBImageInfo.ThumbnailHeight, MFBImageInfo.ThumbnailWidth);
ThumbWidth = bmp.Width;
ThumbHeight = bmp.Height;
using (bmp)
{
// get all properties of the original image and copy them to the new image. This should include the annotation (above)
foreach (PropertyItem pi in inf.Image.PropertyItems)
{
bmp.SetPropertyItem(pi);
}
bmp.Save(szPhysicalPath, ImageFormat.Jpeg);
}
}
}
}
}
}
catch (AmazonS3Exception)
{
// Thumbnail was not found - audio file perhaps? Use the generic audio file.
System.IO.File.Copy(HostingEnvironment.MapPath("~/images/audio.png"), szPhysicalPath);
}
// clean up the folder on S3 - anything that has the GUID but not .mp4 in it or the thumbnail in it. (Save space!) i.e., delete excess thumbnails and the source video file.
List <S3Object> lstS3Objects = new List <S3Object>();
ListObjectsRequest loRequest = new ListObjectsRequest()
{
BucketName = Bucket, Prefix = szBasePath
};
// Get the list of S3 objects
do
{
ListObjectsResponse response = s3.ListObjects(loRequest);
foreach (S3Object o in response.S3Objects)
{
if (o.Key.Contains(GUID) && !o.Key.Contains(FileExtensions.MP4) && !o.Key.Contains(szThumbFile))
{
lstS3Objects.Add(o);
}
}
// If response is truncated, set the marker to get the next
// set of keys.
if (response.IsTruncated)
{
loRequest.Marker = response.NextMarker;
}
else
{
loRequest = null;
}
} while (loRequest != null);
lstS3Objects.ForEach((o) =>
{
s3.DeleteObject(new DeleteObjectRequest()
{
BucketName = Bucket, Key = o.Key
});
});
}
}
/// <summary>
/// Creates the thumbnail from a completed video process. Sets the width/height in the process.
/// </summary>
/// <param name="szBasePath">The base path for the video object</param>
/// <param name="szPhysicalPath">The filename to use for the resulting thumbnail image</param>
public void InitThumbnail(string szBasePath, string szPhysicalPath)
{
if (szBasePath == null)
{
throw new ArgumentNullException(nameof(szBasePath));
}
string szThumbFile = String.Format(CultureInfo.InvariantCulture, "{0}{1}00001{2}", MFBImageInfo.ThumbnailPrefixVideo, GUID, FileExtensions.JPG);
if (szBasePath.StartsWith("/", StringComparison.Ordinal))
{
szBasePath = szBasePath.Substring(1);
}
string srcFile = szBasePath + szThumbFile;
// Copy the thumbnail over
using (IAmazonS3 s3 = AWSConfiguration.S3Client())
{
GetObjectResponse gor = s3.GetObject(new GetObjectRequest()
{
BucketName = Bucket, Key = srcFile
});
if (gor != null && gor.ResponseStream != null)
{
using (gor.ResponseStream)
{
using (System.Drawing.Image image = MFBImageInfo.DrawingCompatibleImageFromStream(gor.ResponseStream))
{
Info inf = MFBImageInfo.InfoFromImage(image);
// save the thumbnail locally.
using (inf.Image)
{
inf.ImageDescription = Comment;
Bitmap bmp = MFBImageInfo.BitmapFromImage(inf.Image, MFBImageInfo.ThumbnailHeight, MFBImageInfo.ThumbnailWidth);
ThumbWidth = bmp.Width;
ThumbHeight = bmp.Height;
using (bmp)
{
// get all properties of the original image and copy them to the new image. This should include the annotation (above)
foreach (PropertyItem pi in inf.Image.PropertyItems)
{
bmp.SetPropertyItem(pi);
}
bmp.Save(szPhysicalPath, ImageFormat.Jpeg);
}
}
}
}
}
// clean up the folder on S3 - anything that has the GUID but not .mp4 in it or the thumbnail in it. (Save space!) i.e., delete excess thumbnails and the source video file.
List <S3Object> lstS3Objects = new List <S3Object>();
ListObjectsRequest loRequest = new ListObjectsRequest()
{
BucketName = Bucket, Prefix = szBasePath
};
// Get the list of S3 objects
do
{
ListObjectsResponse response = s3.ListObjects(loRequest);
foreach (S3Object o in response.S3Objects)
{
if (o.Key.Contains(GUID) && !o.Key.Contains(FileExtensions.MP4) && !o.Key.Contains(szThumbFile))
{
lstS3Objects.Add(o);
}
}
// If response is truncated, set the marker to get the next
// set of keys.
if (response.IsTruncated)
{
loRequest.Marker = response.NextMarker;
}
else
{
loRequest = null;
}
} while (loRequest != null);
lstS3Objects.ForEach((o) =>
{
s3.DeleteObject(new DeleteObjectRequest()
{
BucketName = Bucket, Key = o.Key
});
});
}
}
