/// <summary>
/// Execute the FFmpeg utility with the given <paramref name="mediaSettings"/> and return the text output generated by it.
/// See http://www.ffmpeg.org for documentation.
/// </summary>
/// <param name="mediaSettings">The media settings.</param>
/// <returns>
/// Returns the text output from the execution of the FFmpeg utility. This data can be parsed to learn more about the media file.
/// </returns>
private static string ExecuteFFmpeg(MediaConversionSettings mediaSettings)
{
FFmpeg ffmpeg = new FFmpeg(mediaSettings);
ffmpeg.Execute();
mediaSettings.FFmpegOutput = ffmpeg.Output;
return(mediaSettings.FFmpegOutput);
}
private static string ReplaceTokens(string encoderArguments, MediaConversionSettings mediaSettings)
{
encoderArguments = encoderArguments.Replace("{SourceFilePath}", mediaSettings.FilePathSource);
encoderArguments = encoderArguments.Replace("{Width}", mediaSettings.TargetWidth.ToString(CultureInfo.InvariantCulture));
encoderArguments = encoderArguments.Replace("{Height}", mediaSettings.TargetHeight.ToString(CultureInfo.InvariantCulture));
encoderArguments = encoderArguments.Replace(AutoRotateFilterName, GetAutoRotationFilter(MediaConversionQueue.Instance.Get(mediaSettings.MediaQueueId).RotateFlipAmount, encoderArguments));
encoderArguments = encoderArguments.Replace("{AspectRatio}", Math.Round(mediaSettings.TargetWidth / (double)mediaSettings.TargetHeight, 2).ToString(CultureInfo.InvariantCulture));
encoderArguments = encoderArguments.Replace("{DestinationFilePath}", mediaSettings.FilePathDestination);
encoderArguments = encoderArguments.Replace("{BinPath}", Path.Combine(AppSetting.Instance.PhysicalApplicationPath, "bin"));
encoderArguments = encoderArguments.Replace("{GalleryResourcesPath}", Path.Combine(AppSetting.Instance.PhysicalApplicationPath, AppSetting.Instance.GalleryResourcesPath));
// If the above changes result in an empty filter setting, remove it altogether.
encoderArguments = encoderArguments.Replace(@"-vf """"", String.Empty);
return(encoderArguments);
}
/// <summary>
/// Execute the FFmpeg utility with the given <paramref name="arguments"/> and return the text output generated by it.
/// A default timeout value of 3 seconds is used, which can be overridden with the <paramref name="timeoutMs" /> parameter.
/// See http://www.ffmpeg.org for documentation.
/// </summary>
/// <param name="arguments">The argument values to pass to the FFmpeg utility.
/// Example: -ss 00:00:03 -i "D:\media\video\myvideo.flv" -an -vframes 1 -y "D:\media\video\zThumb_myvideo.jpg"</param>
/// <param name="galleryId">The gallery ID.</param>
/// <param name="timeoutMs">Gets or sets the timeout to apply to FFmpeg, in milliseconds. Defaults to 3 seconds if not
/// specified.</param>
/// <returns>Returns the text output from the execution of the FFmpeg utility. This data can be parsed to learn more about the media file.</returns>
private static string ExecuteFFmpeg(string arguments, int galleryId, int timeoutMs = 3000)
{
var mediaSettings = new MediaConversionSettings
{
FilePathSource = String.Empty,
FilePathDestination = String.Empty,
EncoderSetting = null,
GalleryId = galleryId,
MediaQueueId = int.MinValue,
TimeoutMs = timeoutMs,
MediaObjectId = int.MinValue,
FFmpegArgs = arguments,
FFmpegOutput = String.Empty
};
return(ExecuteFFmpeg(mediaSettings));
}
/// <summary>
/// Creates a media file based on an existing one using the values in the
/// <paramref name="mediaSettings" /> parameter. The output from FFmpeg is returned. The
/// arguments passed to FFmpeg are stored on the
/// <see cref="MediaConversionSettings.FFmpegArgs" /> property.
/// </summary>
/// <param name="mediaSettings">The settings which dicate the media file creation process.</param>
/// <returns>Returns the text output from FFmpeg.</returns>
public static string CreateMedia(MediaConversionSettings mediaSettings)
{
if (!IsAvailable)
{
return(String.Empty);
}
if (mediaSettings == null)
{
throw new ArgumentNullException("mediaSettings");
}
if (mediaSettings.EncoderSetting == null)
{
throw new ArgumentNullException("mediaSettings", "The EncoderSetting property on the mediaSettings parameter was null.");
}
mediaSettings.FFmpegArgs = ReplaceTokens(mediaSettings.EncoderSetting.EncoderArguments, mediaSettings);
return(ExecuteFFmpeg(mediaSettings));
}
private FFmpeg(MediaConversionSettings mediaSettings)
{
MediaSettings = mediaSettings;
_output = new StringBuilder();
}
