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| author | Nyanmisaka <nst799610810@gmail.com> | 2025-05-09 04:43:13 +0800 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2025-05-08 14:43:13 -0600 |
| commit | 07093c84c80474c610d955ad24f7e9b415458bb6 (patch) | |
| tree | 72f45df29501768e2d0ce8cbb436542dcc8c0bc3 | |
| parent | a7bb3ea21489a3a4c9a3e9f60c9521eaa84bad31 (diff) | |
Use VBR and MBBRC in QSV encoders for better quality (#14079)
| -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)) |