diff -up mediastreamer2-5.0.66/src/utils/ffmpeg-priv.c.omv~ mediastreamer2-5.0.66/src/utils/ffmpeg-priv.c
--- mediastreamer2-5.0.66/src/utils/ffmpeg-priv.c.omv~	2022-01-22 18:04:13.828766304 +0100
+++ mediastreamer2-5.0.66/src/utils/ffmpeg-priv.c	2022-01-22 18:10:35.546776805 +0100
@@ -21,7 +21,7 @@
 #include "ffmpeg-priv.h"
 
 
-#ifndef HAVE_FUN_avcodec_encode_video2
+#if 0 //ndef HAVE_FUN_avcodec_encode_video2
 int avcodec_encode_video2 (AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr) {
 	int error=avcodec_encode_video(avctx, avpkt->data, avpkt->size,frame);
 	if (error<0){
@@ -40,13 +40,17 @@ int avcodec_encode_video2 (AVCodecContex
 
 #ifndef HAVE_FUN_avcodec_get_context_defaults3 /**/
 int avcodec_get_context_defaults3 (AVCodecContext *s, AVCodec *codec) {
+#if LIBAVCODEC_VERSION_MAJOR < 59
 	avcodec_get_context_defaults(s);
+#endif
 	return 0;
 }
 
+#if LIBAVCODEC_VERSION_MAJOR < 59
 AVCodecContext *avcodec_alloc_context3(AVCodec *codec){
 	return avcodec_alloc_context();
 }
+#endif
 
 #endif
 
diff -up mediastreamer2-5.0.66/src/utils/ffmpeg-priv.h.omv~ mediastreamer2-5.0.66/src/utils/ffmpeg-priv.h
--- mediastreamer2-5.0.66/src/utils/ffmpeg-priv.h.omv~	2022-01-22 15:50:17.384618144 +0100
+++ mediastreamer2-5.0.66/src/utils/ffmpeg-priv.h	2022-01-22 15:52:41.082908875 +0100
@@ -121,8 +121,10 @@ int avcodec_encode_video2 (AVCodecContex
 
 #ifndef HAVE_FUN_avcodec_get_context_defaults3 /**/
 int avcodec_get_context_defaults3 (AVCodecContext *s, AVCodec *codec);
+#if LIBAVCODEC_VERSION_MAJOR < 59
 AVCodecContext *avcodec_alloc_context3(AVCodec *codec);
 #endif
+#endif
 
 #ifndef HAVE_FUN_avcodec_open2 /**/
 int avcodec_open2 (AVCodecContext *avctx, AVCodec *codec, AVDictionary **options);
@@ -173,5 +175,4 @@ void av_frame_unref (AVFrame *frame);
 #ifdef _MSC_VER
 #pragma warning(pop)
 #endif
-
 #endif /* FFMPEG_PRIV_H */
diff -up mediastreamer2-5.0.66/src/videofilters/h264dec.cpp.omv~ mediastreamer2-5.0.66/src/videofilters/h264dec.cpp
--- mediastreamer2-5.0.66/src/videofilters/h264dec.cpp.omv~	2022-01-22 15:51:09.157728192 +0100
+++ mediastreamer2-5.0.66/src/videofilters/h264dec.cpp	2022-01-22 17:47:44.517795632 +0100
@@ -66,13 +66,15 @@ typedef struct _DecData{
 static void ffmpeg_init(void){
 	static bool_t done=FALSE;
 	if (!done){
+#if LIBAVCODEC_VERSION_MAJOR < 59
 		avcodec_register_all();
+#endif
 		done=TRUE;
 	}
 }
 
 static void dec_open(DecData *d){
-	AVCodec *codec;
+	const AVCodec *codec;
 	int error;
 	codec=avcodec_find_decoder(CODEC_ID_H264);
 	if (codec==NULL) ms_fatal("Could not find H264 decoder in ffmpeg.");
@@ -164,7 +166,11 @@ static mblk_t *get_as_yuvmsg(MSFilter *f
 		ms_error("%s: error in sws_scale().",f->desc->name);
 	}
 #if LIBAVUTIL_VERSION_INT >= AV_VERSION_INT(50,43,0) // backward compatibility with Debian Squeeze (6.0)
+#if LIBAVUTIL_VERSION_MAJOR < 57
 	mblk_set_timestamp_info(yuv_msg, (uint32_t)orig->pkt_pts);
+#else
+	mblk_set_timestamp_info(yuv_msg, (uint32_t)orig->pts);
+#endif
 #endif
 	return yuv_msg;
 }
@@ -325,7 +331,17 @@ static void dec_process(MSFilter *f){
 #if LIBAVUTIL_VERSION_INT >= AV_VERSION_INT(50,43,0) // backward compatibility with Debian Squeeze (6.0)
 				pkt.pts = frame_ts;
 #endif
+#if LIBAVCODEC_VERSION_MAJOR < 59
 				len=avcodec_decode_video2(&d->av_context,d->orig,&got_picture,&pkt);
+#else
+				int ret = avcodec_receive_frame(&d->av_context, d->orig);
+				got_picture = (ret == 0);
+				ret = avcodec_send_packet(&d->av_context, &pkt);
+				if(ret < 0)
+					len = ret;
+				else
+					len = pkt.size;
+#endif
 				if (len<=0) {
 					ms_warning("ms_AVdecoder_process: error %i.",len);
 					ms_filter_notify_no_arg(f,MS_VIDEO_DECODER_DECODING_ERRORS);
diff -up mediastreamer2-5.0.66/src/videofilters/videodec.c.omv~ mediastreamer2-5.0.66/src/videofilters/videodec.c
--- mediastreamer2-5.0.66/src/videofilters/videodec.c.omv~	2022-01-22 18:01:04.246313380 +0100
+++ mediastreamer2-5.0.66/src/videofilters/videodec.c	2022-01-22 18:03:31.666661981 +0100
@@ -49,7 +49,7 @@ extern void ms_ffmpeg_check_init(void);
 
 typedef struct DecState{
 	AVCodecContext av_context;
-	AVCodec *av_codec;
+	const AVCodec *av_codec;
 	enum CodecID codec;
 	mblk_t *input;
 	YuvBuf outbuf;
@@ -661,7 +661,11 @@ static mblk_t *get_as_yuvmsg(MSFilter *f
 #endif
 		ms_error("%s: error in ms_sws_scale().",f->desc->name);
 	}
+#if LIBAVCODEC_VERSION_MAJOR < 59
 	mblk_set_timestamp_info(yuv_msg, (uint32_t)orig->pkt_pts);
+#else
+	mblk_set_timestamp_info(yuv_msg, (uint32_t)orig->pts);
+#endif
 	return yuv_msg;
 }
 /* Bitmasks to select bits of a byte from low side */
@@ -719,7 +723,17 @@ static void dec_process_frame(MSFilter *
 				pkt.data = frame->b_rptr;
 				pkt.size = remain;
 				pkt.pts = frame_ts;
+#if LIBAVCODEC_VERSION_MAJOR < 59
 				len=avcodec_decode_video2(&s->av_context, s->orig, &got_picture,&pkt);
+#else
+				int ret = avcodec_receive_frame(&s->av_context, s->orig);
+				got_picture = (ret == 0);
+				ret = avcodec_send_packet(&s->av_context, &pkt);
+				if (ret < 0)
+					len = ret;
+				else
+					len = pkt.size;
+#endif
 
 				if (len<=0) {
 					ms_warning("ms_AVdecoder_process: error %i.",len);
diff -up mediastreamer2-5.0.66/src/videofilters/videoenc.c.omv~ mediastreamer2-5.0.66/src/videofilters/videoenc.c
--- mediastreamer2-5.0.66/src/videofilters/videoenc.c.omv~	2022-01-22 17:47:56.230833130 +0100
+++ mediastreamer2-5.0.66/src/videofilters/videoenc.c	2022-01-22 18:13:41.544298347 +0100
@@ -34,6 +34,10 @@
 #include <netinet/in.h>			/* ntohl(3) */
 #endif
 
+#if LIBAVCODEC_VERSION_MAJOR >= 59
+#include <libavutil/imgutils.h>
+#endif
+
 #include "rfc2429.h"
 
 
@@ -128,7 +132,9 @@ void ms_ffmpeg_log_callback(void* ptr, i
 
 void ms_ffmpeg_check_init(){
 	if(!avcodec_initialized){
+#if LIBAVCODEC_VERSION_MAJOR < 59
 		avcodec_register_all();
+#endif
 		avcodec_initialized=TRUE;
 #ifdef ENABLE_LOG_FFMPEG
 		av_log_set_level(AV_LOG_WARNING);
@@ -139,7 +145,7 @@ void ms_ffmpeg_check_init(){
 
 typedef struct EncState{
 	AVCodecContext av_context;
-	AVCodec *av_codec;
+	const AVCodec *av_codec;
 	AVFrame* pict;
 	enum CodecID codec;
 	mblk_t *comp_buf;
@@ -325,14 +331,20 @@ static void prepare(EncState *s){
 
 }
 
+static AVDictionary **codecopts = NULL;
+
 static void prepare_h263(EncState *s){
+#if LIBAVCODEC_VERSION_MAJOR < 59
 	AVCodecContext *c=&s->av_context;
+	c->rtp_payload_size = s->mtu/2;
+#else
+	av_dict_set_int(codecopts, "ps", s->mtu/2, 0);
+#endif
 	/* we don't use the rtp_callback but use rtp_mode that forces ffmpeg to insert
 	Start Codes as much as possible in the bitstream */
 #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
         c->rtp_mode = 1;
 #endif
-	c->rtp_payload_size = s->mtu/2;
 	if (s->profile==0){
 		s->codec=CODEC_ID_H263;
 	}else{
@@ -382,7 +394,7 @@ static void enc_preprocess(MSFilter *f){
 		ms_error("could not find encoder for codec id %i",s->codec);
 		return;
 	}
-	error=avcodec_open2(&s->av_context, s->av_codec, NULL);
+	error=avcodec_open2(&s->av_context, s->av_codec, codecopts);
 	if (error!=0) {
 		ms_error("avcodec_open() failed: %i",error);
 		return;
@@ -815,7 +827,11 @@ static void process_frame(MSFilter *f, m
 	ms_yuv_buf_init_from_mblk(&yuv, inm);
 	/* convert image if necessary */
 	av_frame_unref(s->pict);
+#if LIBAVCODEC_VERSION_MAJOR < 59
 	avpicture_fill((AVPicture*)s->pict,yuv.planes[0],c->pix_fmt,c->width,c->height);
+#else
+	av_image_fill_arrays(s->pict->data, s->pict->linesize, yuv.planes[0], c->pix_fmt, c->width, c->height, 1);
+#endif
 
 	/* timestamp used by ffmpeg, unset here */
 	s->pict->pts=AV_NOPTS_VALUE;
@@ -840,7 +856,15 @@ static void process_frame(MSFilter *f, m
 #endif
 	packet.data=comp_buf->b_wptr;
 	packet.size=comp_buf_sz;
+#if LIBAVCODEC_VERSION_MAJOR < 59
 	error=avcodec_encode_video2(c, &packet, s->pict, &got_packet);
+#else
+	error=avcodec_send_frame(c, s->pict);
+	if(!error) {
+		got_packet = 1;
+		error=avcodec_receive_packet(c, &packet);
+	}
+#endif
 
 	if (error<0) ms_warning("ms_AVencoder_process: error %i.",error);
 	else if (got_packet){