demux/mux: avformat: use ch_layout from ffmpeg 5.1

modules/demux/avformat/demux.c

@@ -470,7 +470,11 @@ int avformat_OpenDemux( vlc_object_t *p_this )
             es_format_Init( &es_fmt, AUDIO_ES, fcc );
             es_fmt.i_original_fourcc = CodecTagToFourcc( cp->codec_tag );
             es_fmt.i_bitrate = cp->bit_rate;
+#if LIBAVFORMAT_VERSION_CHECK( 60, 03, 100 )
+            es_fmt.audio.i_channels = cp->ch_layout.nb_channels;
+#else
             es_fmt.audio.i_channels = cp->channels;
+#endif
             es_fmt.audio.i_rate = cp->sample_rate;
             es_fmt.audio.i_bitspersample = cp->bits_per_coded_sample;
             es_fmt.audio.i_blockalign = cp->block_align;

modules/demux/avformat/mux.c

@@ -271,7 +271,11 @@ static int AddStream( sout_mux_t *p_mux, sout_input_t *p_input )
     {
     case AUDIO_ES:
         codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
+#if LIBAVFORMAT_VERSION_CHECK( 60, 03, 100 )
+        av_channel_layout_default( &codecpar->ch_layout, fmt->audio.i_channels );
+#else
         codecpar->channels = fmt->audio.i_channels;
+#endif
         codecpar->sample_rate = fmt->audio.i_rate;
         stream->time_base = (AVRational){1, codecpar->sample_rate};
         if (fmt->i_bitrate == 0) {