From a8018961fcad5af9dde6b2ed78445983fd13509a Mon Sep 17 00:00:00 2001
From: Asd-g <65298684+Asd-g@users.noreply.github.com>
Date: Sun, 7 Apr 2024 03:31:06 +0300
Subject: [PATCH] LWLibavAudioSource: set default output channel layout (#64)

Regression from 2df8afd77f3518ba57dc38bef31dfa463407acde.
---
 AviSynth/audio_output.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/AviSynth/audio_output.cpp b/AviSynth/audio_output.cpp
index 13b86620..e77be3d1 100644
--- a/AviSynth/audio_output.cpp
+++ b/AviSynth/audio_output.cpp
@@ -66,7 +66,11 @@ void as_setup_audio_rendering
     if ( channel_layout != 0 )
         av_channel_layout_from_string(&aohp->output_channel_layout, channel_layout );
     else
-        av_channel_layout_copy(&aohp->output_channel_layout, &ctx->ch_layout );
+    {
+        av_channel_layout_copy(&aohp->output_channel_layout, &ctx->ch_layout);
+        if (aohp->output_channel_layout.order == AV_CHANNEL_ORDER_UNSPEC)
+            av_channel_layout_default(&aohp->output_channel_layout, aohp->output_channel_layout.nb_channels);
+    }
     /* Sample rate. */
     if( sample_rate > 0 )
         aohp->output_sample_rate = sample_rate;