Cutlery/jellyfin
1
0
Fork 0
mirror of https://github.com/jellyfin/jellyfin.git synced 2025-07-09 03:04:24 -04:00
Code Issues Packages Projects Releases Wiki Activity

Fix the bitrate scale factor for h264-to-hevc transcoding (#9485)

Browse Source
This commit is contained in:
Nyanmisaka 2023-03-15 06:06:10 +08:00 committed by GitHub
parent 6821a2ab35
commit 173a963dbf
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 11 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs
View File

@ -2021,14 +2021,20 @@ namespace MediaBrowser.Controller.MediaEncoding
private static double GetVideoBitrateScaleFactor(string codec) private static double GetVideoBitrateScaleFactor(string codec)
{ {
// hevc & vp9 - 40% more efficient than h.264
if (string.Equals(codec, "h265", StringComparison.OrdinalIgnoreCase) if (string.Equals(codec, "h265", StringComparison.OrdinalIgnoreCase)
|| string.Equals(codec, "hevc", StringComparison.OrdinalIgnoreCase) || string.Equals(codec, "hevc", StringComparison.OrdinalIgnoreCase)
|| string.Equals(codec, "vp9", StringComparison.OrdinalIgnoreCase) || string.Equals(codec, "vp9", StringComparison.OrdinalIgnoreCase))
|| string.Equals(codec, "av1", StringComparison.OrdinalIgnoreCase))
{ {
return .6; return .6;
} }
// av1 - 50% more efficient than h.264
if (string.Equals(codec, "av1", StringComparison.OrdinalIgnoreCase))
{
return .5;
}
return 1; return 1;
} }
@ -2036,7 +2042,9 @@ namespace MediaBrowser.Controller.MediaEncoding
{ {
var inputScaleFactor = GetVideoBitrateScaleFactor(inputVideoCodec); var inputScaleFactor = GetVideoBitrateScaleFactor(inputVideoCodec);
var outputScaleFactor = GetVideoBitrateScaleFactor(outputVideoCodec); 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) if (bitrate <= 500000)
{ {