private static void GenerateForVid(string videoFile, VideoThumbnailerConfig config, bool doRemoveFirst)
{
// First check if thumbs are there
var filePattern = ExtractFileNameForSave(Path.GetFileName(videoFile), "") + "*" + DEFAULT_THUMB_EXT;
var fld = new DirectoryInfo(Path.GetDirectoryName(videoFile));
// Do we need to clean first? (a.k.a. regenerate always?)
if (fld.GetFiles(filePattern).Length == 0 || doRemoveFirst)
{
FFmpegMediaInfo info = new FFmpegMediaInfo(videoFile, config.ffmpeg.ffprobe_path);
if (config.settings.info_json_generation)
WriteVideoInfoToFile(info, videoFile);
//Take video snapshots (config: thumbcount)
double length = info.Duration.TotalSeconds;
double step = length/config.settings.thumbcount;
double pos = config.settings.first_thumbnail_sec; // set first thumb
Dictionary<TimeSpan, Bitmap> snapshots = new Dictionary<TimeSpan, Bitmap>();
while (pos < length)
{
TimeSpan position = TimeSpan.FromSeconds(pos);
try
{
if (pos + step > length)
{
//it is the last
position = TimeSpan.FromSeconds(pos - config.settings.last_thumbnail_sec);
}
Bitmap bmp = info.GetSnapshot(position, config.ffmpeg.ffmpeg_path);
snapshots[position] = bmp;
}
catch (Exception ex)
{
string msg = ex.Message;
}
pos += step;
}
//Write snapshots to file
WriteSnapshotsToFile(snapshots, videoFile, config.settings.subdir, config.settings.thumbquality,
doRemoveFirst);
}
}
private static void WriteVideoInfoToFile(FFmpegMediaInfo info, string orignalVideoFileName)
{
string json = JsonConvert.SerializeObject(info, Formatting.Indented);
var jsonInfoFile = ExtractFileNameForSave(orignalVideoFileName, ".json");
System.IO.File.WriteAllText(jsonInfoFile, json);
}