/// <summary>
/// 生成视频封面
/// </summary>
/// <param name="path">视频的绝对路径：/Upload/File/zzzzz.mp4</param>
/// <param name="uploadifyResult"></param>
public void GenerateVideoCoverImg(string path, UploadifyResult uploadifyResult)
{
#region 生成图片
string videoFullPath = WebHelper.GetMapPath(path);
FFmpegHelper ff = new FFmpegHelper(videoFullPath);
VideoInfo videoInfo = ff.GetVideoInfo();
string saveImgPath = string.Empty;
if (videoInfo.Width < 1)
{
videoInfo.Width = 500;
videoInfo.Height = 330;
}
if (videoInfo.Width > 0)
{
uploadifyResult.videoInfo = JsonConvert.SerializeObject(videoInfo);
int[] whInt = GetDpi(_videoCoverDpi);
string dir = Path.GetDirectoryName(videoFullPath);
string videoFileName = Path.GetFileNameWithoutExtension(videoFullPath);
int index = videoFileName.LastIndexOf(']');
videoFileName = videoFileName.Substring(index + 1);//去掉括号
int duration = 3;
if (uploadifyResult.fileSize < 10485760)
{
duration = 2;
}
saveImgPath = string.Concat(dir, "\\", videoFileName, ".jpg");
ff.GetVideoFirstImage(saveImgPath, videoInfo.Width, videoInfo.Height, duration);
//生成的缩略图的路径格式是：原图路径 + “-”+ dpi + 后缀
if (System.IO.File.Exists(saveImgPath))
{
string desPath = string.Concat(dir, "\\", videoFileName, "-" + _videoCoverDpi, ".jpg");// videoFullPath.Insert(videoFullPath.LastIndexOf('.'), "-" + _videoCoverDpi);
ThumbnailHelper.GenerateImage2(saveImgPath, desPath, whInt[0], whInt[1]);
}
}
#endregion
}