diff options
| author | Shadowghost <Shadowghost@users.noreply.github.com> | 2023-03-14 18:21:01 -0400 |
|---|---|---|
| committer | crobibero <cody@robibe.ro> | 2023-03-14 18:21:01 -0400 |
| commit | 21dc3fa042ccdcc096c32506c6950f3fcb180ed6 (patch) | |
| tree | 4da0206c223eb467a628339bd009b9ea9b2fbab1 | |
| parent | 21dcf775bee6459707435cc64bc3864f9e0eb0fe (diff) | |
Backport pull request #9485 from jellyfin/release-10.8.z
Fix the bitrate scale factor for h264-to-hevc transcoding
Original-merge: 173a963dbf6072897b1086abf3f378ddfa7fda5a
Merged-by: Nyanmisaka <nst799610810@gmail.com>
Backported-by: crobibero <cody@robibe.ro>
| -rw-r--r-- | MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs b/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs index 3e338e871..5de57917e 100644 --- a/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs +++ b/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs @@ -2116,14 +2116,20 @@ namespace MediaBrowser.Controller.MediaEncoding private static double GetVideoBitrateScaleFactor(string codec) { + // hevc & vp9 - 40% more efficient than h.264 if (string.Equals(codec, "h265", StringComparison.OrdinalIgnoreCase) || string.Equals(codec, "hevc", StringComparison.OrdinalIgnoreCase) - || string.Equals(codec, "vp9", StringComparison.OrdinalIgnoreCase) - || string.Equals(codec, "av1", StringComparison.OrdinalIgnoreCase)) + || string.Equals(codec, "vp9", StringComparison.OrdinalIgnoreCase)) { return .6; } + // av1 - 50% more efficient than h.264 + if (string.Equals(codec, "av1", StringComparison.OrdinalIgnoreCase)) + { + return .5; + } + return 1; } @@ -2131,7 +2137,9 @@ namespace MediaBrowser.Controller.MediaEncoding { var inputScaleFactor = GetVideoBitrateScaleFactor(inputVideoCodec); var outputScaleFactor = GetVideoBitrateScaleFactor(outputVideoCodec); - var scaleFactor = outputScaleFactor / inputScaleFactor; + + // Don't scale the real bitrate lower than the requested bitrate + var scaleFactor = Math.Min(outputScaleFactor / inputScaleFactor, 1); if (bitrate <= 500000) { |