Re: Text & Image overlay in AxltmmPlayCtrl, how to?

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This topic and its replies were posted before the current version of LEADTOOLS was released and may no longer be applicable.

#1 Posted : Tuesday, October 28, 2008 4:01:43 AM(UTC)

Mario Cruz

Groups: Registered
Posts: 19

Hi,

I'm trying to use your toolkit in a
c# project vs2005, but I'm begginer in DirectShow and I'm sure that I don't know to use it correctly.

I expose you my needs;

my project receives 4 to 16 simultaneous UDP MPEG2TS streams,
it
has to add overlay image, text and timestamp and shows and captures
each stream in localmachine and sends by UDP the new streams with overlay.

I read Multimedia help files and I saw the examples projects,

I
tried with several activex AxltmmPlayCtrl, and i assigned UDP source to each one, but i didn't know where have to assign the Overlay text, image and if it's be able to assign TimeStamp?

forgive me for my poor english and thanks in advance,
Mario Cruz.


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#2 Posted : Tuesday, October 28, 2008 5:25:38 AM(UTC)

Maen Hasan

Groups: Registered, Tech Support
Posts: 1,326

Was thanked: 1 time(s) in 1 post(s)

Mario,

If you want to add text to the video stream (print it on the video pixel data), you can use our LEAD Video Text Overlay DirectShow filter.

The filter can be added to any of our controls (ltmmPlay, ltmmConvert or ltmmCapture). If you have multiple controls and you want to overlay text on all of them, you need to insert a different instance of the filter into each control.

For more details, please see the following 2 help topics in our MM toolkit help file:
- Programmatically Inserting a Processor Filter (Visual Basic)
- Access the Interface of Filters (Visual Basic)

Also, see the help topic for the Text Overlay filter in our Multimedia Filters help file.

Thanks,
Maen Badwan
LEADTOOLS Technical Support

#3 Posted : Tuesday, October 28, 2008 8:08:10 PM(UTC)

Mario Cruz

Groups: Registered
Posts: 19

Maen,

thank you for your help.

I read help files and don't find anything about overlay timestamp, is there any property to insert timestamp or we have to create any method to modify overlay text (date/time) each second?.

Thanks again.
Mario

#4 Posted : Wednesday, October 29, 2008 6:10:51 AM(UTC)

Maen Hasan

Groups: Registered, Tech Support
Posts: 1,326

Was thanked: 1 time(s) in 1 post(s)

Mario,

The filter does not automatically get the date or time, so you will have to obtain them some other way, and modify the text string every second or every frame.
You can do that either in a timer event, or use our LEAD Video Callback filter, which triggers a function you provide and does it for every video frame.

Thanks,
Maen Badwan
LEADTOOLS Technical Support

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