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path: root/MediaBrowser.MediaEncoding/Probing/ProbeResultNormalizer.cs
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Diffstat (limited to 'MediaBrowser.MediaEncoding/Probing/ProbeResultNormalizer.cs')
-rw-r--r--MediaBrowser.MediaEncoding/Probing/ProbeResultNormalizer.cs10
1 files changed, 10 insertions, 0 deletions
diff --git a/MediaBrowser.MediaEncoding/Probing/ProbeResultNormalizer.cs b/MediaBrowser.MediaEncoding/Probing/ProbeResultNormalizer.cs
index 22537a4d9..cdeefbbbd 100644
--- a/MediaBrowser.MediaEncoding/Probing/ProbeResultNormalizer.cs
+++ b/MediaBrowser.MediaEncoding/Probing/ProbeResultNormalizer.cs
@@ -666,6 +666,16 @@ namespace MediaBrowser.MediaEncoding.Probing
stream.AverageFrameRate = GetFrameRate(streamInfo.AverageFrameRate);
stream.RealFrameRate = GetFrameRate(streamInfo.RFrameRate);
+ // Interlaced video streams in Matroska containers return the field rate instead of the frame rate
+ // as both the average and real frame rate, so we half the returned frame rates to get the correct values
+ //
+ // https://gitlab.com/mbunkus/mkvtoolnix/-/wikis/Wrong-frame-rate-displayed
+ if (stream.IsInterlaced && formatInfo.FormatName.Contains("matroska", StringComparison.OrdinalIgnoreCase))
+ {
+ stream.AverageFrameRate /= 2;
+ stream.RealFrameRate /= 2;
+ }
+
if (isAudio || string.Equals(stream.Codec, "gif", StringComparison.OrdinalIgnoreCase) ||
string.Equals(stream.Codec, "png", StringComparison.OrdinalIgnoreCase))
{