asp.net a method of capturing a frame from a video file and generating an image file

A few days ago to attend the Tech-ed Congress, in fact, more is to know some like-minded friends, MS Curriculum is often a superficial, so listen to the lesson to also have no meaning. However, it is gratifying to know some friends in the garden. Technicians are really very easy to contact, we can quickly cut into the topic, and then to explore. This is perhaps the simple side of the technical staff. These two days, and changed the new units, feeling for a change, it is really no meaning. I remember when I first began to work, the boss told me not to change, then I and others said this, I did not think I was reduced to this step. Always wanted to find a good team, a good club, but has not been the wish. I don't know what's going to happen now, but at present it seems not optimistic, I hope the team is a mutual aid, unity, passion, flexibility, mutual respect, complementary team, may be very abstract, but all my vision from the Agile software Development, I do not want to see the team rigid, traditional, weighty. Also do not like the individualistic team, "software development is the game of man and Man", yes, I want is such a people-oriented team, the requirements are not high, but difficult to achieve. At least now in the confusion ...

No nonsense, we often generate thumbnails for the picture, in Windows video in the view of the thumbnail also show the picture, if a video system, then users upload video, how to generate thumbnails for it? To operate the video file, the usual method is DirectX inside the driectshow, use it can achieve grab screen, grab map, capture the function of video, think of this, but also surprised at Ms Demo Vista app that gorgeous 3d effect.

The first thing you do when you want to use DirectShow in. NET is to need an assembly that can help you with the call to DirectShow, and you don't need to use COM to dispense with the registration process, which is the assembly name: Interop. DexterLib.dll, it's like any other DLL, just add a reference.

Using this DLL, you encapsulate a class that allows you to easily generate a video thumbnail, and applies to WinForm, asp.net, cool! The effect is as follows:

WinForm

asp.net:

Source code in this, with interest, down the past to see it

This article supporting source code