From de96b625f6d066ddb8b51786861673b92ce92024 Mon Sep 17 00:00:00 2001
From: brabebhin <9284164+brabebhin@users.noreply.github.com>
Date: Thu, 21 Nov 2024 12:54:20 +0200
Subject: [PATCH] fix stereo downmix on 32 bit PCM (#441)

Co-authored-by: Brabebhin
---
 Source/UncompressedAudioSampleProvider.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Source/UncompressedAudioSampleProvider.cpp b/Source/UncompressedAudioSampleProvider.cpp
index 74bb9ca0ff..2d48af7513 100644
--- a/Source/UncompressedAudioSampleProvider.cpp
+++ b/Source/UncompressedAudioSampleProvider.cpp
@@ -145,11 +145,12 @@ void UncompressedAudioSampleProvider::SetMediaEncodingProperties(AVSampleFormat
 
     // set encoding properties
     encodingProperties.Subtype(outSampleFormat == AV_SAMPLE_FMT_FLT ? MediaEncodingSubtypes::Float() : MediaEncodingSubtypes::Pcm());
+    encodingProperties.Properties().Insert(MF_MT_AUDIO_CHANNEL_MASK, winrt::box_value(reportedChannelLayout));
+
     encodingProperties.BitsPerSample(bitsPerSample);
     encodingProperties.SampleRate(outSampleRate);
     encodingProperties.ChannelCount(outChannelLayout.nb_channels);
     encodingProperties.Bitrate(bitsPerSample * outSampleRate * outChannelLayout.nb_channels);
-    encodingProperties.Properties().Insert(MF_MT_AUDIO_CHANNEL_MASK, winrt::box_value(reportedChannelLayout));
 }
 
 HRESULT UncompressedAudioSampleProvider::CheckFormatChanged(AVSampleFormat format, const AVChannelLayout& channelLayout, int sampleRate)