/// <summary>
/// Creates a new <see cref="DecodeContext"/> instance.
/// </summary>
/// <param name="url">The URL of the video source. If a file system path is provided, make sure it is an absolute path.</param>
/// <param name="decodingOptions">Decoding options.</param>
internal DecodeContext([NotNull] string url, [NotNull] DecodingOptions decodingOptions)
{
_decodingOptions = decodingOptions;
// 1. Open a format context.
var formatContext = ffmpeg.avformat_alloc_context();
FFmpegHelper.Verify(ffmpeg.avformat_open_input(&formatContext, url, null, null), Dispose);
_formatContext = formatContext;
// 2. Try to read stream information (codec, duration, etc.).
FFmpegHelper.Verify(ffmpeg.avformat_find_stream_info(formatContext, null), Dispose);
// The rest are initialized lazily. See LazyInitialize().
}
/// <summary>
/// Loads a video from a URL using specified decoding options.
/// </summary>
/// <param name="url">The URL of the video source.</param>
/// <param name="decodingOptions">The decoding options to use.</param>
/// <returns>Loaded video.</returns>
public static Video LoadFromUrl([NotNull] string url, [NotNull] DecodingOptions decodingOptions)
{
return(new Video(url, decodingOptions));
}
/// <summary>
/// Loads a video from file system using specified decoding options.
/// </summary>
/// <param name="path">The path of the video file.</param>
/// <param name="decodingOptions">The decoding options to use.</param>
/// <returns>Loaded video.</returns>
public static Video LoadFromFile([NotNull] string path, [NotNull] DecodingOptions decodingOptions)
{
var fullPath = Path.GetFullPath(path);
return(LoadFromUrl(fullPath, decodingOptions));
}