QMap - 视频播放与转换

视频播放与转换不但提供了常规视频文件的播放，还提供了将视频分解为图像。分解范围和间隔帧采集并用，给视频图像分析带来了很大的方便。同时，还提供了将一组图像转换为视频的方法，实现了简单的图片打包功能。 

现按软件功能界面介绍如下：

1. 视频播放
    点击“载入”按钮，选择视频文件并打开。通过滑动杆可以快速定位，点击“全屏切换（F1）”按钮或按F1键进行全屏显示和恢复。

2. 视频分解成图片

    载入视频后，得到视频的总帧数。头尾帧号分别显示在编辑框内，修改“视频帧开始”与“到”中的值，确定要分割的范围。“间隔帧数”中的值确定采样的步长。“图像名后缀”中的值可选择性输入。得到的图片名如，“....\视频文件名_可选后缀名_间隔帧值.jpg”。

3. 视频分解

    点击“视频分解”按钮，选择图片输出的文件夹，然后开始分解。分解过程中，可按Esc键中断操作。结束后报告得到图片的总数。

4. 图片合成视频

    选择“视频编码”、“视频大小”、“每秒帧数”后，可将一批图像合成视频。其中视频的大小为“自动”时，会根据所选图像的大小自动决定。选择其它尺寸，可自定义视频帧的宽与高。

5. 合成视频

    点击“合成视频”按钮，选择视频输出的文件夹。运行中可按Esc键中断操作。




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