Microsoft ENcoder SDK memory leak

Question

I am using EE4 and every time I call _deviceSource.PreviewWindow = new PreviewWindow(new HandleRef(picBox, picBox.Handle)); the memory use increases by around 60 MB. The problem is that when I close the form and dispose all the resources on _job and _devicesource the system does not release the memory...even if I call CG.collect(); the system still uses those 60MB doing something. The problem is even worse if I try to call the form several times. At some point I get the Out of memory error because the memory utilization increases continuously. Any suggestion? I check on the SDK samples and in all cases the problem persist. So my question is: is this a bug?

Answer 1

My mistake...! I was not Disposing correctly all the resources:

_deviceSource.PreviewWindow = null;
_job.RemoveDeviceSource(_deviceSource);
_deviceSource.Dispose();

releases all the memory resources used on the video.

Answer 2

I ran into the same issue today. I found that specifically you have to call source.PreviewWindow.Dispose() before calling job.RemoveDeviceSource(source):

// The order in which we remove, dispose, and set null is very important. 
// Anything less creates a huge memory leak.
// 1st Stop Encoding
job.StopEncoding();

// 2nd, Must Dispose the Preview Window 
// Before Calling Job.RemoveDeviceSource << Absolutely
source.PreviewWindow.Dispose();
source.PreviewWindow = null;

// 3rd, Remove the Source
job.RemoveDeviceSource(source);

// 4th, Dispose the Source
source.Dispose();
source = null;

// 5th, Dispose the Job
job.Dispose();
job = null;