public MediaFile DiscoverFile(string filePath, bool takeScreenshot = true)
{
long duration = 0;
uint width, height, fps_n, fps_d, par_n, par_d, ret, fps = 0;
string container, audio_codec, video_codec;
bool has_audio, has_video;
float par = 0;
IntPtr container_ptr, audio_codec_ptr, video_codec_ptr;
IntPtr error = IntPtr.Zero;
LongoMatch.Core.Common.Image preview = null;
MultimediaFactory factory;
IFramesCapturer thumbnailer;
ret = lgm_discover_uri(filePath, out duration, out width, out height, out fps_n,
out fps_d, out par_n, out par_d, out container_ptr,
out video_codec_ptr, out audio_codec_ptr, out error);
if (error != IntPtr.Zero)
{
throw new GLib.GException(error);
}
if (ret != 0)
{
throw new Exception(Catalog.GetString("Could not parse file:") + filePath);
}
has_audio = audio_codec_ptr != IntPtr.Zero;
has_video = video_codec_ptr != IntPtr.Zero;
container = GLib.Marshaller.PtrToStringGFree(container_ptr);
audio_codec = GLib.Marshaller.PtrToStringGFree(audio_codec_ptr);
video_codec = GLib.Marshaller.PtrToStringGFree(video_codec_ptr);
/* From nanoseconds to milliseconds */
duration = duration / (1000 * 1000);
if (has_video)
{
fps = fps_n / fps_d;
par = (float)par_n / par_d;
if (takeScreenshot)
{
factory = new MultimediaFactory();
thumbnailer = factory.GetFramesCapturer();
thumbnailer.Open(filePath);
preview = thumbnailer.GetFrame(new Time {
TotalSeconds = 2
}, false,
THUMBNAIL_MAX_WIDTH, THUMBNAIL_MAX_HEIGHT);
thumbnailer.Dispose();
}
}
return(new LongoMatch.Core.Store.MediaFile(filePath, duration, (ushort)fps, has_audio, has_video,
container, video_codec, audio_codec, width, height,
par, preview, null));
}
public FramesSeriesCapturer(string videoFile, long start, long stop, uint interval, string outputDir)
{
MultimediaFactory mf = new MultimediaFactory();
this.capturer = mf.GetFramesCapturer();
this.capturer.Open(videoFile);
this.start = start;
this.stop = stop;
this.interval = interval;
this.outputDir = outputDir;
this.seriesName = System.IO.Path.GetFileName(outputDir);
this.totalFrames = (int)Math.Floor((double)((stop - start) / interval)) + 1;
}
