Milestone SDK 2019 R1 => Server 2019 Video Playback issue

MIP
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1

Hi guys,

We have an issue when we connect from SDK 2019 to milestone server 2019 and play back a video, video stream doesn’t play continuously. It freeze at a one frame.

What basically do is,

_milestonePlaybackController = ClientControl.Instance.GetPlaybackController(playbackControllerFQID);
_milestonePlaybackController.SkipGaps = false;
 
_milestonePlaybackController.PlaybackTime = startTimeUtc; // I set the playback time here an at the same time I see the following exception in the debug console,
 
 
MIP: Error: AsyncSequencesGetAroundWithSpanHandler (CommandService):Exception source:   System.Drawing
Exception type:    System.InvalidOperationException
Exception message:   Object is currently in use elsewhere.
Exception target site: CheckErrorStatus
  at System.Drawing.Graphics.CheckErrorStatus(Int32 status)
  at System.Drawing.Graphics.FillRectangle(Brush brush, Int32 x, Int32 y, Int32 width, Int32 height)
  at VideoOS.Platform.Client.TimeLineUserControl.DisplayLine()
  at VideoOS.Platform.Client.TimeLineUserControl.SequenceRecordingsHandler(Object objects, Object syncState)
  at VideoOS.Platform.SDK.Export.SDKInternalCommandService.AsyncSequencesGetAroundWithSpanHandler(Object parm)

Any idea what causing this issue?

PS: It works fine when I talk from SDK2019 to Server 2018

2

Hi. We tried it with a sample “MediaPlaybackViewer2015”, and cannot reproduce it.

Could you please try this sample and say if it works for you or gives the same issue?

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Please find a following code;

_playbackController = ClientControl.Instance.GetPlaybackController(_playbackFQID);

And test it with adding your custom code with something like:

_milestonePlaybackController.SkipGaps = false;

_milestonePlaybackController.PlaybackTime = startTimeUtc;

3

Thanks for your reply Andriy,

To make the investigation easier, I’ll post the things that I have observed so far.

1 - This issue happens only when I talk to Milestone Server 2019 from SDK 2019. Other combinations work fine.

2 - Most of the time it only happens when I set the PlaybackTime to less than one hour back from the current time. It’s not fixed though; its varying from 1 hour to 15mins. but almost all the time when the playbackTime is less than 15mins.

_milestonePlaybackController.PlaybackTime = startTimeUtc; 
// most of the time when DateTime.UtcNow.Addhours(-1)  > startTimeUtc video feed get freezed

3 - I see the same issue in your sample application “MediaPlaybackViewer2015”. When I press backward play button, video freed is freezed until it pass more than ~15mins from the current time (again not 15mins always)

4 - I see the above exception in the debug console at the same time when I set the PlaybackTime;

MIP: Error: AsyncSequencesGetAroundWithSpanHandler (CommandService):Exception source:   System.Drawing
Exception type:    System.InvalidOperationException
Exception message:   Object is currently in use elsewhere.
Exception target site: CheckErrorStatus
  at System.Drawing.Graphics.CheckErrorStatus(Int32 status)
  at System.Drawing.Graphics.FillRectangle(Brush brush, Int32 x, Int32 y, Int32 width, Int32 height)
  at VideoOS.Platform.Client.TimeLineUserControl.DisplayLine()
  at VideoOS.Platform.Client.TimeLineUserControl.SequenceRecordingsHandler(Object objects, Object syncState)
  at VideoOS.Platform.SDK.Export.SDKInternalCommandService.AsyncSequencesGetAroundWithSpanHandler(Object parm)

Please let me know if you need further detail on this.

Thanks

4

Hi. Thank you for the detail. We haven’t seen the exception with this test but we were able to see a similar issue(our freezing time was almost 15 seconds). We are going to investigate this one.

5

Thanks for the response Rie. Would you please keep me updated about the status of your investigation?

PS: It’s quite important for us to have a solution for this issue as it holds us releasing an update for one of the major features in our product.

6

Hi. The issue will be fixed in the next version( 2019 R2). It will soon release in June 2019. Please keep eye on the latest news from Milestone.

7

Thanks Rie