--- pjproject-2.10/pjmedia/src/pjmedia-codec/opus.c	2021-03-19 04:55:21.491267756 +0100
+++ pjsip/pjmedia/src/pjmedia-codec/opus.c	2021-03-19 05:48:19.457507442 +0100
@@ -542,7 +542,7 @@ static pj_status_t factory_enum_codecs( pjmedia_codec_factory *factory,
          */	
 	codecs[0].encoding_name = pj_str("opus");
 	codecs[0].clock_rate    = 48000;
-	codecs[0].channel_cnt   = 2;
+	codecs[0].channel_cnt   = 1;
 	*count = 1;
     }

diff -ruN pjproject-2.10/pjmedia/src/pjmedia-codec/ffmpeg_vid_codecs.c pjsip/pjmedia/src/pjmedia-codec/ffmpeg_vid_codecs.c
--- pjproject-2.10/pjmedia/src/pjmedia-codec/ffmpeg_vid_codecs.c	2020-02-14 10:48:27.000000000 +0100
+++ pjsip/pjmedia/src/pjmedia-codec/ffmpeg_vid_codecs.c	2021-02-06 22:51:16.641714862 +0100
@@ -62,16 +62,7 @@
 #endif
 
 #if LIBAVCODEC_VER_AT_LEAST(53,61)
-#  if LIBAVCODEC_VER_AT_LEAST(54,59)
-   /* Not sure when AVCodec::encode is obsoleted/removed. */
-#      define AVCODEC_HAS_ENCODE(c)	(c->encode2)
-#  else
-   /* Not sure when AVCodec::encode2 is introduced. It appears in 
-    * libavcodec 53.61 where some codecs actually still use AVCodec::encode
-    * (e.g: H263, H264).
-    */
-#      define AVCODEC_HAS_ENCODE(c)	(c->encode || c->encode2)
-#  endif
+#  define AVCODEC_HAS_ENCODE(c)	(c->encode2)
 #  define AV_OPT_SET(obj,name,val,opt)	(av_opt_set(obj,name,val,opt)==0)
 #  define AV_OPT_SET_INT(obj,name,val)	(av_opt_set_int(obj,name,val,0)==0)
 #else
@@ -266,6 +257,7 @@
 /* H264 constants */
 #define PROFILE_H264_BASELINE		66
 #define PROFILE_H264_MAIN		77
+#define PROFILE_H264_HIGH		100
 
 /* Codec specific functions */
 #if PJMEDIA_HAS_FFMPEG_CODEC_H264
@@ -404,6 +396,9 @@
 	case PROFILE_H264_MAIN:
 	    profile = "main";
 	    break;
+	case PROFILE_H264_HIGH:
+	    profile = "high";
+	    break;
 	default:
 	    break;
 	}
@@ -440,11 +435,11 @@
 	/* Misc x264 settings (performance, quality, latency, etc).
 	 * Let's just use the x264 predefined preset & tune.
 	 */
-	if (!AV_OPT_SET(ctx->priv_data, "preset", "veryfast", 0)) {
+	if (!AV_OPT_SET(ctx->priv_data, "preset", "ultrafast", 0)) {
 	    PJ_LOG(3, (THIS_FILE, "Failed to set x264 preset 'veryfast'"));
 	}
-	if (!AV_OPT_SET(ctx->priv_data, "tune", "animation+zerolatency", 0)) {
-	    PJ_LOG(3, (THIS_FILE, "Failed to set x264 tune 'zerolatency'"));
+	if (!AV_OPT_SET(ctx->priv_data, "tune", "fastdecode+zerolatency", 0)) {
+	    PJ_LOG(3, (THIS_FILE, "Failed to set x264 tune 'fastdecode+zerolatency'"));
 	}
     }
 
@@ -1430,12 +1425,12 @@
     /* Check if encoder has been opened */
     PJ_ASSERT_RETURN(ff->enc_ctx, PJ_EINVALIDOP);
 
-#ifdef PJMEDIA_USE_OLD_FFMPEG
-    avcodec_get_frame_defaults(&avframe);
-#else
+//#ifdef PJMEDIA_USE_OLD_FFMPEG
+//    avcodec_get_frame_defaults(&avframe);
+//#else
     pj_bzero(&avframe, sizeof(avframe));
     av_frame_unref(&avframe);
-#endif
+//#endif
 
     // Let ffmpeg manage the timestamps
     /*
@@ -1692,12 +1687,12 @@
      * whole decoding session, and seems to be freed when the codec context
      * closed).
      */
-#ifdef PJMEDIA_USE_OLD_FFMPEG
-    avcodec_get_frame_defaults(&avframe);
-#else
+//#ifdef PJMEDIA_USE_OLD_FFMPEG
+//    avcodec_get_frame_defaults(&avframe);
+//#else
     pj_bzero(&avframe, sizeof(avframe));
     av_frame_unref(&avframe);
-#endif
+//#endif
 
     /* Init packet, the container of the encoded data */
     av_init_packet(&avpacket);