How to instantiate an object for jpegvideosource.get please? Image attached.
Tom
You must use the constructor and must call the Init() method. I would like to recommend that you take a look at the CameraStreamResolution sample source code, the GetRes() method must be what you need..
I see the solution with getres() for live. Regarding get() to return list of jpeg, I see how to reference a specific indice of ‘new1.get()[0], as shown in screenshot’. Not having luck with writing list< jpegdata > = new1.get() as list however. Is there an example of generating a reference to a jpeg list sequence please?
Aim is 'what is fastest means to process a series of images, for example 20 frames in specific start end time 2 min window. Would serializing, building with get()[0] indice in loop be similar performance as one call to return list of increments between start and end time through get() please? A goal is to not write to disk until 20 images are image processed in batch and then write once one file. I think defining time of frame in memorystream to return jpeg may be an alternative if reason of significant faster performance exists.
Tom
This code (modified within the CameraStreamResolution sample) works for me.
static void GetRes()
{
var jpegSource = new JPEGVideoSource(_camera);
jpegSource.Init();
jpegSource.Height = 0;
jpegSource.Width = 0;
Console.WriteLine("Asking for recorded images from camera {0} ",
_camera.Name);
DateTime startTime = DateTime.UtcNow + TimeSpan.FromSeconds(-2);
int i = 0;
List<object> js = jpegSource.Get(startTime, TimeSpan.FromSeconds(2), 4);
foreach(var j in js)
{
i++;
SaveImage(j as JPEGData, i.ToString());
}
}
static void SaveImage(JPEGData JpData, string num)
{
int len = JpData.Bytes.GetLength(0);
Byte[] jpeg = new Byte[len];
Array.Copy(JpData.Bytes, 0, jpeg, 0, len);
string fname = $@"C:\TEST\test{num}.jpg";
System.IO.File.WriteAllBytes(fname, jpeg);
Console.WriteLine("Written to disk. " + fname);
}
Solution works great as described, however upon editing to 20 jpegs over two minutes there is a Timeout waiting for move operation response.
Tom
Update, error is resolved. All is well.