Пример #1
0
        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;
        }
Пример #2
0
        /// <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;
        }