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Diffstat (limited to 'MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs')
| -rw-r--r-- | MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs b/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs index 0bc922cbb..f5a99a93c 100644 --- a/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs +++ b/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs @@ -1572,6 +1572,26 @@ namespace MediaBrowser.Controller.MediaEncoding return FormattableString.Invariant($" -maxrate {bitrate} -bufsize {bufsize}"); } + if (string.Equals(videoCodec, "h264_qsv", StringComparison.OrdinalIgnoreCase) + || string.Equals(videoCodec, "hevc_qsv", StringComparison.OrdinalIgnoreCase) + || string.Equals(videoCodec, "av1_qsv", StringComparison.OrdinalIgnoreCase)) + { + // TODO: probe QSV encoders' capabilities and enable more tuning options + // See also https://github.com/intel/media-delivery/blob/master/doc/quality.rst + + // Enable MacroBlock level bitrate control for better subjective visual quality + var mbbrcOpt = string.Empty; + if (string.Equals(videoCodec, "h264_qsv", StringComparison.OrdinalIgnoreCase) + || string.Equals(videoCodec, "hevc_qsv", StringComparison.OrdinalIgnoreCase)) + { + mbbrcOpt = " -mbbrc 1"; + } + + // Set (maxrate == bitrate + 1) to trigger VBR for better bitrate allocation + // Set (rc_init_occupancy == 2 * bitrate) and (bufsize == 4 * bitrate) to deal with drastic scene changes + return FormattableString.Invariant($"{mbbrcOpt} -b:v {bitrate} -maxrate {bitrate + 1} -rc_init_occupancy {bitrate * 2} -bufsize {bitrate * 4}"); + } + if (string.Equals(videoCodec, "h264_amf", StringComparison.OrdinalIgnoreCase) || string.Equals(videoCodec, "hevc_amf", StringComparison.OrdinalIgnoreCase) || string.Equals(videoCodec, "av1_amf", StringComparison.OrdinalIgnoreCase)) |