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Backport pull request #9485 from jellyfin/release-10.8.z

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Fix the bitrate scale factor for h264-to-hevc transcoding

Original-merge: 173a963dbf

Merged-by: Nyanmisaka <nst799610810@gmail.com>

Backported-by: crobibero <cody@robibe.ro>
This commit is contained in:
Shadowghost 2023-03-14 18:21:01 -04:00 committed by crobibero
parent 21dcf775be
commit 21dc3fa042
1 changed files with 11 additions and 3 deletions
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14
MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs
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@ -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)
{