如何从 C# 中的图像目录创建视频？
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How can I create a video from a directory of images in C#?
提问by JP Richardson
I have a directory of bitmaps that are all of the same dimension. I would like to convert these bitmaps into a video file. I don't care if the video file (codec) is wmv or avi. My only requirement is that I specify the frame rate. This does not need to be cross platform, Windows (Vista and XP) only. I have read a few things about using the Windows Media SDK or DirectShow, but none of them are that explicit about providing code samples.
我有一个所有尺寸相同的位图目录。我想将这些位图转换为视频文件。我不在乎视频文件（编解码器）是 wmv 还是 avi。我唯一的要求是指定帧速率。这不需要是跨平台的，仅适用于 Windows（Vista 和 XP）。我已经阅读了一些关于使用 Windows Media SDK 或 DirectShow 的内容，但它们都没有明确提供代码示例。
Could anyone provide some insight, or some valuable resources that might help me to do this in C#?
任何人都可以提供一些见解或一些有价值的资源来帮助我在 C# 中做到这一点吗？
采纳答案by crftr
At the risk of being voted down, I'll offer a possible alternative option-- a buffered Bitmap animation.
冒着被否决的风险，我将提供一个可能的替代选项——缓冲位图动画。
double framesPerSecond;
Bitmap[] imagesToDisplay; // add the desired bitmaps to this array
Timer playbackTimer;
int currentImageIndex;
PictureBox displayArea;
(...)
currentImageIndex = 0;
playbackTimer.Interval = 1000 / framesPerSecond;
playbackTimer.AutoReset = true;
playbackTimer.Elapsed += new ElapsedEventHandler(playbackNextFrame);
playbackTimer.Start();
(...)
void playbackNextFrame(object sender, ElapsedEventArgs e)
{
if (currentImageIndex + 1 >= imagesToDisplay.Length)
{
playbackTimer.Stop();
return;
}
displayArea.Image = imagesToDisplay[currentImageIndex++];
}
An approach such as this works well if the viewing user has access to the images, enough resources to keep the images in memory, doesn't want to wait for a video to encode, and there may exist a need for different playback speeds.
如果查看用户可以访问图像，有足够的资源将图像保存在内存中，不想等待视频编码，并且可能需要不同的播放速度，则这种方法很有效。
...just throwing it out there.
……只是把它扔在那里。
回答by Aleris
You can use the AVI* from avifil32 library, there is an example here (not tried):
http://www.adp-gmbh.ch/csharp/mandelbrot/index.html
您可以使用 avifil32 库中的 AVI*，这里有一个示例（未尝试）：http:
//www.adp-gmbh.ch/csharp/mandelbrot/index.html
This might be of interest for you:
http://bytescout.com/swfslideshowscout_example_c_sharp.html
(make flash slideshow from JPG images using C#)
这可能对您感兴趣：
http: //bytescout.com/swfslideshowscout_example_c_sharp.html
（使用 C# 从 JPG 图像制作 Flash 幻灯片）
回答by GvS
I have not tried it, but Windows Movie Makerhas an API, and XML file format you can use.
我还没有尝试过，但Windows Movie Maker有一个 API 和您可以使用的 XML 文件格式。
回答by Osama Al-Maadeed
回答by Stu Mackellar
An ideal technology to achieve what you want is DirectShow Editing Services. However, if this is a one-off project then I wouldn't bother - the learning curve can be quite steep.
实现您想要的理想技术是DirectShow 编辑服务。但是，如果这是一个一次性项目，那么我不会打扰 - 学习曲线可能非常陡峭。
There's not much in the way of DES sample code available, although there's plenty of general DirectShow samples both within and outside MSDN. For your purposes I'd recommend starting herefor a basic explanation of using still images as a video source.
尽管在 MSDN 内部和外部都有大量的通用 DirectShow 示例，但可用的 DES 示例代码的方式并不多。出于您的目的，我建议您从这里开始，了解使用静止图像作为视频源的基本解释。
回答by loraderon
You can use Splicerto do this.
您可以使用Splicer来执行此操作。
Please see example 3 at http://www.codeplex.com/splicer/Wiki/View.aspx?title=News%20Feeds&referringTitle=Home
请参阅http://www.codeplex.com/splicer/Wiki/View.aspx?title=News%20Feeds&referringTitle=Home 上的示例 3
Edit:
编辑：
using (ITimeline timeline = new DefaultTimeline(25))
{
IGroup group = timeline.AddVideoGroup(32, 160, 100);
ITrack videoTrack = group.AddTrack();
IClip clip1 = videoTrack.AddImage("image1.jpg", 0, 2);
IClip clip2 = videoTrack.AddImage("image2.jpg", 0, 2);
IClip clip3 = videoTrack.AddImage("image3.jpg", 0, 2);
IClip clip4 = videoTrack.AddImage("image4.jpg", 0, 2);
double halfDuration = 0.5;
group.AddTransition(clip2.Offset - halfDuration, halfDuration, StandardTransitions.CreateFade(), true);
group.AddTransition(clip2.Offset, halfDuration, StandardTransitions.CreateFade(), false);
group.AddTransition(clip3.Offset - halfDuration, halfDuration, StandardTransitions.CreateFade(), true);
group.AddTransition(clip3.Offset, halfDuration, StandardTransitions.CreateFade(), false);
group.AddTransition(clip4.Offset - halfDuration, halfDuration, StandardTransitions.CreateFade(), true);
group.AddTransition(clip4.Offset, halfDuration, StandardTransitions.CreateFade(), false);
ITrack audioTrack = timeline.AddAudioGroup().AddTrack();
IClip audio =
audioTrack.AddAudio("soundtrack.wav", 0, videoTrack.Duration);
audioTrack.AddEffect(0, audio.Duration,
StandardEffects.CreateAudioEnvelope(1.0, 1.0, 1.0, audio.Duration));
using (
WindowsMediaRenderer renderer =
new WindowsMediaRenderer(timeline, "output.wmv", WindowsMediaProfiles.HighQualityVideo))
{
renderer.Render();
}
}
