diff options
Diffstat (limited to 'MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs')
| -rw-r--r-- | MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs | 58 |
1 files changed, 43 insertions, 15 deletions
diff --git a/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs b/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs index f4370f0a5..87874001a 100644 --- a/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs +++ b/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs @@ -613,7 +613,9 @@ namespace MediaBrowser.Controller.MediaEncoding } // TODO: Perhaps also use original_size=1920x800 ?? - return string.Format("subtitles=filename='{0}'{1}{2}{3}", + return string.Format( + CultureInfo.InvariantCulture, + "subtitles=filename='{0}'{1}{2}", _mediaEncoder.EscapeSubtitleFilterPath(subtitlePath), charsetParam, // fallbackFontParam, @@ -622,7 +624,9 @@ namespace MediaBrowser.Controller.MediaEncoding var mediaPath = state.MediaPath ?? string.Empty; - return string.Format("subtitles='{0}:si={1}'{2}", + return string.Format( + CultureInfo.InvariantCulture, + "subtitles='{0}:si={1}'{2}", _mediaEncoder.EscapeSubtitleFilterPath(mediaPath), state.InternalSubtitleStreamOffset.ToString(_usCulture), // fallbackFontParam, @@ -1135,27 +1139,51 @@ namespace MediaBrowser.Controller.MediaEncoding { var bitrate = request.VideoBitRate; - // If specific values were requested, then force the caller to supply a bitrate as well - if (request.Height.HasValue && request.Width.HasValue) - { - return bitrate; - } - if (videoStream != null) { - if (bitrate.HasValue) - { - var inputVideoCodec = videoStream.Codec; - bitrate = ScaleBitrate(bitrate.Value, inputVideoCodec, outputVideoCodec); + var isUpscaling = request.Height.HasValue && videoStream.Height.HasValue && + request.Height.Value > videoStream.Height.Value && request.Width.HasValue && videoStream.Width.HasValue && + request.Width.Value > videoStream.Width.Value; - // If a max bitrate was requested, don't let the scaled bitrate exceed it - if (request.VideoBitRate.HasValue) + // Don't allow bitrate increases unless upscaling + if (!isUpscaling) + { + if (bitrate.HasValue && videoStream.BitRate.HasValue) { - bitrate = Math.Min(bitrate.Value, request.VideoBitRate.Value); + bitrate = GetMinBitrate(videoStream.BitRate.Value, bitrate.Value); } } } + if (bitrate.HasValue) + { + var inputVideoCodec = videoStream.Codec; + bitrate = ScaleBitrate(bitrate.Value, inputVideoCodec, outputVideoCodec); + + // If a max bitrate was requested, don't let the scaled bitrate exceed it + if (request.VideoBitRate.HasValue) + { + bitrate = Math.Min(bitrate.Value, request.VideoBitRate.Value); + } + } + + return bitrate; + } + + private int GetMinBitrate(int sourceBitrate, int requestedBitrate) + { + // these values were chosen from testing to improve low bitrate streams + if (sourceBitrate <= 2000000) + { + sourceBitrate = Convert.ToInt32(sourceBitrate * 2.5); + } + else if (sourceBitrate <= 3000000) + { + sourceBitrate = Convert.ToInt32(sourceBitrate * 2); + } + + var bitrate = Math.Min(sourceBitrate, requestedBitrate); + return bitrate; } |