在.net中使用FFmpeg？ [英] Using FFmpeg in .net?
问题描述
我已经环顾四周，并找到了几个包装器，如SharpFFmpeg（ http://sourceforge.net/projects/sharpffmpeg/ ）和ffmpeg-sharp（ http://code.google.com/p/ffmpeg-sharp/ ）。首先，我想使用ffmpeg-sharp作为其LGPL，而SharpFFmpeg是GPL。但是，它有相当多的编译错误。原来它是为单声道编译器编写的，我尝试用单声道编译，但无法弄清楚如何。然后，我自己手动修改编译器错误，但是遇到了一些可怕的错误，并且认为我最好不要这样做。所以我放弃了ffmpeg-sharp。
然后我看着SharpFFmpeg，它看起来像我想要的，所有的功能P /调用给我。但是它的GPL？ AVCodec.cs和AVFormat.cs文件看起来像avcodec.c和avformat.c的端口，我认为我可以自己端口？然后就不用担心许可了。
但是，我想在开始编码之前就这样做。我应该：
- 编写自己的C ++库与ffmpeg进行交互，然后让C＃程序与C ++库交谈，以播放/转换视频等。
或
- 端口avcodec.h和avformat.h（所有我需要？）到c＃通过使用大量的DllImports并将其完全写入C＃？
首先，我认为我不太在C ++，因为我很少使用它，但我知道足够绕开。我认为＃1的原因可能是更好的选择是，大多数FFmpeg教程是在C ++中，我还将比内存管理更多的控制，如果我要在c＃中执行。
你觉得怎么样？
你也会碰巧有使用FFmpeg的任何有用的链接（也许是教程）？
其他一些
$ b
编写自己的互操作包装器在.NET中可能是一个耗时且困难的过程。为互操作编写C ++库有一些优势 - 特别是它允许您大大简化C＃代码的接口。然而，如果你只需要一个图书馆的一个子集，那可能会使你的生活更容易在C＃中进行互操作。
So I know its a fairly big challenge but I want to write a basic movie player/converter in c# using the FFmpeg library. However, the first obstacle I need to overcome is wrapping the FFmpeg library in c#. I've downloaded ffmpeg but couldn't compile it on Windows, so I downloaded a precompiled version for me. Ok awesome. Then I started looking for C# wrappers.
I have looked around and have found a few wrappers such as SharpFFmpeg (http://sourceforge.net/projects/sharpffmpeg/) and ffmpeg-sharp (http://code.google.com/p/ffmpeg-sharp/). First of all, I wanted to use ffmpeg-sharp as its LGPL and SharpFFmpeg is GPL. However, it had quite a few compile errors. Turns out it was written for the mono compiler, I tried compiling it with mono but couldn't figure out how. I then started to manually fix the compiler errors myself, but came across a few scary ones and thought I'd better leave those alone. So I gave up on ffmpeg-sharp.
Then I looked at SharpFFmpeg and it looks like what I want, all the functions P/Invoked for me. However its GPL? Both the AVCodec.cs and AVFormat.cs files look like ports of avcodec.c and avformat.c which I reckon I could port myself? Then not have to worry about licencing.
But I want to get this right before I go ahead and start coding. Should I:
- Write my own C++ library for interacting with ffmpeg, then have my C# program talk to the C++ library in order to play/convert videos etc.
OR
- Port avcodec.h and avformat.h (is that all i need?) to c# by using a whole lot of DllImports and write it entirely in C#?
First of all consider that I'm not great at C++ as I rarely use it but I know enough to get around. The reason I'm thinking #1 might be the better option is that most FFmpeg tutorials are in C++ and I'd also have more control over memory management than if I was to do it in c#.
What do you think? Also would you happen to have any useful links (perhaps a tutorial) for using FFmpeg?
a few other managed wrappers for you to check out
Writing your own interop wrappers can be a time-consuming and difficult process in .NET. There are some advantages to writing a C++ library for the interop - particularly as it allows you to greatly simplify the interface that the C# code. However, if you are only needing a subset of the library, it might make your life easier to just do the interop in C#.
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