Encoders are allowed to change the input format. Hence we need to check that...

Encoders are allowed to change the input format. Hence we need to check that our second attempt to spawn an encoder didn't do so.

modules/stream_out/transcode.c

@@ -1261,8 +1261,15 @@ static int transcode_audio_new( sout_stream_t *p_stream,
         id->p_encoder->p_cfg = p_stream->p_sys->p_audio_cfg;
         id->p_encoder->p_module =
             module_Need( id->p_encoder, "encoder", p_sys->psz_aenc, true );
-        if( !id->p_encoder->p_module )
+        if( !id->p_encoder->p_module ||
+            fmt_last.audio.i_channels != id->p_encoder->fmt_in.audio.i_channels  ||
+            fmt_last.i_codec != id->p_encoder->fmt_in.i_codec )
         {
+            if( id->p_encoder->p_module )
+            {
+                module_Unneed( id->p_encoder, id->p_encoder->p_module );
+                id->p_encoder->p_module = NULL;
+            }
             msg_Err( p_stream, "cannot find audio encoder (module:%s fourcc:%4.4s)",
                      p_sys->psz_aenc ? p_sys->psz_aenc : "any",
                      (char *)&p_sys->i_acodec );