private static string GetAspectRatio(MediaStreamInfo info)
{
var original = info.display_aspect_ratio;
int height;
int width;
var parts = (original ?? string.Empty).Split(':');
if (!(parts.Length == 2 &&
int.TryParse(parts[0], NumberStyles.Any, UsCulture, out width) &&
int.TryParse(parts[1], NumberStyles.Any, UsCulture, out height) &&
width > 0 &&
height > 0))
{
width = info.width;
height = info.height;
}
if (width > 0 && height > 0)
{
double ratio = width;
ratio /= height;
if (IsClose(ratio, 1.777777778, .03))
{
return "16:9";
}
if (IsClose(ratio, 1.3333333333, .05))
{
return "4:3";
}
if (IsClose(ratio, 1.41))
{
return "1.41:1";
}
if (IsClose(ratio, 1.5))
{
return "1.5:1";
}
if (IsClose(ratio, 1.6))
{
return "1.6:1";
}
if (IsClose(ratio, 1.66666666667))
{
return "5:3";
}
if (IsClose(ratio, 1.85, .02))
{
return "1.85:1";
}
if (IsClose(ratio, 2.35, .025))
{
return "2.35:1";
}
if (IsClose(ratio, 2.4, .025))
{
return "2.40:1";
}
}
return original;
}
/// <summary>
/// Converts ffprobe stream info to our MediaStream class
/// </summary>
/// <param name="streamInfo">The stream info.</param>
/// <param name="formatInfo">The format info.</param>
/// <returns>MediaStream.</returns>
private static MediaStream GetMediaStream(MediaStreamInfo streamInfo, MediaFormatInfo formatInfo)
{
var stream = new MediaStream
{
Codec = streamInfo.codec_name,
Profile = streamInfo.profile,
Level = streamInfo.level,
Index = streamInfo.index
};
if (streamInfo.tags != null)
{
stream.Language = GetDictionaryValue(streamInfo.tags, "language");
}
if (string.Equals(streamInfo.codec_type, "audio", StringComparison.OrdinalIgnoreCase))
{
stream.Type = MediaStreamType.Audio;
stream.Channels = streamInfo.channels;
if (!string.IsNullOrEmpty(streamInfo.sample_rate))
{
stream.SampleRate = int.Parse(streamInfo.sample_rate, UsCulture);
}
stream.ChannelLayout = ParseChannelLayout(streamInfo.channel_layout);
}
else if (string.Equals(streamInfo.codec_type, "subtitle", StringComparison.OrdinalIgnoreCase))
{
stream.Type = MediaStreamType.Subtitle;
}
else if (string.Equals(streamInfo.codec_type, "video", StringComparison.OrdinalIgnoreCase))
{
stream.Type = MediaStreamType.Video;
stream.Width = streamInfo.width;
stream.Height = streamInfo.height;
stream.AspectRatio = GetAspectRatio(streamInfo);
stream.AverageFrameRate = GetFrameRate(streamInfo.avg_frame_rate);
stream.RealFrameRate = GetFrameRate(streamInfo.r_frame_rate);
}
else
{
return null;
}
// Get stream bitrate
if (stream.Type != MediaStreamType.Subtitle)
{
var bitrate = 0;
if (!string.IsNullOrEmpty(streamInfo.bit_rate))
{
bitrate = int.Parse(streamInfo.bit_rate, UsCulture);
}
else if (formatInfo != null && !string.IsNullOrEmpty(formatInfo.bit_rate))
{
// If the stream info doesn't have a bitrate get the value from the media format info
bitrate = int.Parse(formatInfo.bit_rate, UsCulture);
}
if (bitrate > 0)
{
stream.BitRate = bitrate;
}
}
if (streamInfo.disposition != null)
{
var isDefault = GetDictionaryValue(streamInfo.disposition, "default");
var isForced = GetDictionaryValue(streamInfo.disposition, "forced");
stream.IsDefault = string.Equals(isDefault, "1", StringComparison.OrdinalIgnoreCase);
stream.IsForced = string.Equals(isForced, "1", StringComparison.OrdinalIgnoreCase);
}
return stream;
}