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#1 Posted : Friday, October 20, 2017 2:08:12 PM(UTC)

Walter  
Walter

Groups: Tech Support
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This Visual Studio 2017 project leverages the LEADTOOLS Imaging SDK with the LEADTOOLS Multimedia SDK to playback a render a media file and write a string into the video data. This is accomplished using LEADTOOLS Video Callback filter with the LEADTOOLS PlayCtrl to access the raw frame data.

Adding text to video can also be done easily using the LEADTOOLS Video Text Overlay filter, and the LEADTOOLS controls can use multiple text overlays at the same time. If you need more than a couple text overlays or if you want more control over how the text is rendered, using the callback may be a better solution since it provides complete control. It would allow for writing text in multiple different locations at the same time as well.

This demo uses the Leadtools.RasterImage class to wrap the raw data provided by the video callback filter. This can also be accomplished using the .NET Bitmap, but you will need to copy the data back into the pData parameter for the changes to show in the LEADTOOLS control. Using the RasterImage class, this copying is not necessary.

To run this demo, please extract it into the following directory:
C:\LEADTOOLS 19\Examples\posts\t12331\

If you have the LEADTOOLS Still Imaging and Multimedia SDKs installed separately, you will need to update the references.
File Attachment(s):
CS_LMVCallback_RasterImageDrawString_v19.zip (13kb) downloaded 532 time(s).
Walter Bates
Senior Support Engineer
LEAD Technologies, Inc.
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