I want to Rotate a video with some angle.

Question

hi all,

i m making a windows application in C#. i am capturing a video in a panel, and  i want to rotate this video by Some degree at the time of caputring through C# code...........
,plz  any one can help me...
 
thanks in advance.

Answer 1

Generally, you need a transformation filter to rotate the video data. In most cases it is implemented in C++, or perhaps you would prefer to find a third party filter that does the task. For C# related questions you should rather ask there: DirectShow .NET Forums

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http://alax.info/blog/tag/directshow

Answer 2

hi,
 i m beginer in directshow where i could found rotation filter. can you provide me any test application for that....
 thanks....

Answer 3

IIRC, LeadTools has (a commercial) one.  See my Links page.

There is no sample one that I am aware of.  You can adapt the resize filter on my site, as I pointed out to another poster a few days ago.

Filters are generally in C++ though, not in .NET.

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Answer 4

It depends how or what level you want to do. If you can use DirectShow Filter, you can get IMediaSample buffer, before rendering. Refer In-Place transform example, which manipulates Sample image. You can do the similar rotation you want.
david.tac

Answer 5

It depends how or what level you want to do. If you can use DirectShow Filter, you can get IMediaSample buffer, before rendering. Refer In-Place transform example, which manipulates Sample image. You can do the similar rotation you want.
david.tac

You can't use an in-place transform filter to do a rotation because, except in the rare case of square video (width == height), the media type on the output pin is different than that on the input pin.

Also, there is a more recent thread where I have given some sample code and Ralf has pointed to his SF project which has a sample implementation of rotation.

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Answer 6

No. What I meant was to use that as a reference how to get ImageSample buffer. For the Geometry, even it is squre-shaped, (w=h), you still can not do rotate, because some pixels are rotated outside the rectangle buffer. Rotating Image is just a similar manipulation as image transform. So IN-Place example, is a good reference for the question that was asked.
david.tac

Answer 7

You can do a rotate for a square image in an inplace transform filter.  Look at the code I provided through the link in my last response.  I'm not sure why you think an inplace sample would be better than a regular transform filter like ezrgb24 or the resize filter on my Downloads page which shows how to have a different dimension media sample on the input and output pins.

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