如何在C#中的图像目录中创建视频？

Question

我有一个位图目录,它们都是相同的维度.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.我唯一的要求是我指定帧率.这不需要跨平台,仅限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.

任何人都可以提供一些见解,或者一些有价值的资源可以帮助我在C#中做到这一点吗？

Answer 1

如果被拒绝,我将提供一个可能的替代选项 - 缓冲的位图动画.

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++];
}

如果观看用户可以访问图像,足够的资源将图像保存在存储器中,不想等待视频编码,并且可能存在对不同回放速度的需要,则诸如此类的方法工作良好.

......把它扔出去

Answer 2

您可以使用Splicer执行此操作.

请参阅http://www.codeplex.com/splicer/Wiki/View.aspx?title=News%20Feeds&referringTitle=Home上的示例3

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();
    }
}