From 84fd5a09532bd1e854ec3745609f845aa7098da2 Mon Sep 17 00:00:00 2001 From: Orry Verducci Date: Sun, 25 Oct 2020 16:35:03 +0000 Subject: [PATCH] Fix frame rate probing for interlaced MKV files --- .../Probing/ProbeResultNormalizer.cs | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/MediaBrowser.MediaEncoding/Probing/ProbeResultNormalizer.cs b/MediaBrowser.MediaEncoding/Probing/ProbeResultNormalizer.cs index 22537a4d95..cdeefbbbdf 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)) {