Inserting an watermarked frame into a video

Question

Imran 2018-7-28

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https://ww2.mathworks.cn/matlabcentral/answers/412524-inserting-an-watermarked-frame-into-a-video

回答： Walter Roberson 2018-7-28

I have extracted one frame from a video and then performed some operation on that frame. Now I want to insert this frame into the video. But when I insert the frame, it's values are changed. But I want to insert the frame into the video without changing its values.How can this be done? I have use avi video format.

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Answer 1

Image Analyst 2018-7-28

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https://ww2.mathworks.cn/matlabcentral/answers/412524-inserting-an-watermarked-frame-into-a-video#answer_330754

Well, you're doing it incorrectly. What else can I say, given what you've provided us?

http://www.mathworks.com/matlabcentral/answers/6200-tutorial-how-to-ask-a-question-on-answers-and-get-a-fast-answer

Make sure you're putting back a frame of the same data type (RGB uint8).

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Answer 2

Walter Roberson 2018-7-28

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https://ww2.mathworks.cn/matlabcentral/answers/412524-inserting-an-watermarked-frame-into-a-video#answer_330767

When you create the VideoWriter object, you need to specify the profile as one of 'Uncompressed AVI', 'Indexed AVI', or 'Grayscale AVI'

https://www.mathworks.com/help/matlab/ref/videowriter.html

Note: when I tested using Uncompressed AVI, no codec information was stored; likewise when I let it use the default Motion JPEG (which is a lossy compression.)