diff --git a/daemon/audio_player.c b/daemon/audio_player.c
index ba7ca9daa..99d3bad48 100644
--- a/daemon/audio_player.c
+++ b/daemon/audio_player.c
@@ -51,7 +51,7 @@ static bool audio_player_run(struct media_player *mp) {
 
 // call locked in W
 bool audio_player_setup(struct call_media *m, const rtp_payload_type *dst_pt,
-		unsigned int size_ms, unsigned int delay_ms)
+		unsigned int size_ms, unsigned int delay_ms, str_case_value_ht codec_set)
 {
 	if (!dst_pt)
 		return false;
@@ -123,7 +123,7 @@ bool audio_player_setup(struct call_media *m, const rtp_payload_type *dst_pt,
 	ap->ptime_us = ptime_us;
 	ap->ptime = ptime_smp;
 
-	if (media_player_setup(mp, &src_pt, dst_pt))
+	if (media_player_setup(mp, &src_pt, dst_pt, codec_set))
 		goto error;
 
 	bufsize_ms = MAX(bufsize_ms, ptime_ms * 2); // make sure the buf size is at least 2 frames
diff --git a/daemon/call.c b/daemon/call.c
index 2969baa26..4c33a2805 100644
--- a/daemon/call.c
+++ b/daemon/call.c
@@ -2600,7 +2600,7 @@ static void __update_init_subscribers(struct call_media *media, struct stream_pa
 	ice_update(media->ice_agent, sp, opmode == OP_OFFER); /* sp == NULL: update in case rtcp-mux changed */
 
 	recording_setup_media(media);
-	t38_gateway_start(media->t38_gateway);
+	t38_gateway_start(media->t38_gateway, flags ? flags->codec_set : str_case_value_ht_null());
 	audio_player_start(media);
 
 	if (mqtt_publish_scope() == MPS_MEDIA)
@@ -2710,6 +2710,7 @@ static void __call_monologue_init_from_flags(struct call_monologue *ml, struct c
 				.repeat = flags->repeat_times,
 				.start_pos = flags->start_pos,
 				.block_egress = !!flags->block_egress,
+				.codec_set = flags->codec_set,
 			);
 		if (flags->file.len)
 			ret = media_player_init_file(ml->rec_player, &flags->file, opts);
diff --git a/daemon/call_interfaces.c b/daemon/call_interfaces.c
index d9f4c8ca0..9caa23588 100644
--- a/daemon/call_interfaces.c
+++ b/daemon/call_interfaces.c
@@ -1313,7 +1313,9 @@ void call_ng_codec_flags(ng_parser_ctx_t *ctx, str *key, parser_arg value, helpe
 			return;
 	}
 #ifdef WITH_TRANSCODING
-	if (out->opmode == OP_OFFER || out->opmode == OP_REQUEST || out->opmode == OP_PUBLISH) {
+	if (out->opmode == OP_OFFER || out->opmode == OP_REQUEST || out->opmode == OP_PUBLISH
+			|| out->opmode == OP_PLAY_MEDIA)
+	{
 		switch (__csh_lookup(key)) {
 			case CSH_LOOKUP("accept"):
 				call_ng_flags_str_list(ctx, value, call_ng_flags_esc_str_list, &out->codec_accept);
@@ -3486,6 +3488,7 @@ const char *call_play_media_ng(ng_parser_ctx_t *ctx) {
 				.repeat = flags.repeat_times,
 				.start_pos = flags.start_pos,
 				.block_egress = !!flags.block_egress,
+				.codec_set = flags.codec_set,
 			);
 
 		if (flags.file.len) {
diff --git a/daemon/codec.c b/daemon/codec.c
index b8334c0d8..e1c548283 100644
--- a/daemon/codec.c
+++ b/daemon/codec.c
@@ -58,6 +58,7 @@ static rtp_payload_type *codec_store_find_compatible(struct codec_store *cs,
 		const rtp_payload_type *pt);
 static void __rtp_payload_type_add_name(codec_names_ht, rtp_payload_type *pt);
 static void codec_calc_lost(struct ssrc_ctx *ssrc, uint16_t seq);
+static void __codec_options_set(call_t *call, rtp_payload_type *pt, str_case_value_ht codec_set);
 
 
 static struct codec_handler codec_handler_stub = {
@@ -560,10 +561,11 @@ static void __make_audio_player_decoder(struct codec_handler *handler, rtp_paylo
 // used for generic playback (audio_player, t38_gateway)
 struct codec_handler *codec_handler_make_playback(const rtp_payload_type *src_pt,
 		const rtp_payload_type *dst_pt, unsigned long last_ts, struct call_media *media,
-		uint32_t ssrc)
+		uint32_t ssrc, str_case_value_ht codec_set)
 {
 	struct codec_handler *handler = __handler_new(src_pt, media, NULL);
 	rtp_payload_type_copy(&handler->dest_pt, dst_pt);
+	__codec_options_set(media ? media->call : NULL, &handler->dest_pt, codec_set);
 	handler->handler_func = handler_func_playback;
 	handler->ssrc_handler = (void *) __ssrc_handler_transcode_new(handler);
 	if (!handler->ssrc_handler) {
@@ -588,9 +590,9 @@ struct codec_handler *codec_handler_make_playback(const rtp_payload_type *src_pt
 // used for "play media" player
 struct codec_handler *codec_handler_make_media_player(const rtp_payload_type *src_pt,
 		const rtp_payload_type *dst_pt, unsigned long last_ts, struct call_media *media,
-		uint32_t ssrc)
+		uint32_t ssrc, str_case_value_ht codec_set)
 {
-	struct codec_handler *h = codec_handler_make_playback(src_pt, dst_pt, last_ts, media, ssrc);
+	struct codec_handler *h = codec_handler_make_playback(src_pt, dst_pt, last_ts, media, ssrc, codec_set);
 	if (!h)
 		return NULL;
 	if (audio_player_is_active(media)) {
@@ -603,10 +605,12 @@ struct codec_handler *codec_handler_make_media_player(const rtp_payload_type *sr
 	}
 	return h;
 }
-struct codec_handler *codec_handler_make_dummy(const rtp_payload_type *dst_pt, struct call_media *media)
+struct codec_handler *codec_handler_make_dummy(const rtp_payload_type *dst_pt, struct call_media *media,
+		str_case_value_ht codec_set)
 {
 	struct codec_handler *handler = __handler_new(NULL, media, NULL);
 	rtp_payload_type_copy(&handler->dest_pt, dst_pt);
+	__codec_options_set(media->call, &handler->dest_pt, codec_set);
 	return handler;
 }
 
@@ -1523,7 +1527,8 @@ next:
 			}
 
 			audio_player_setup(sink, pref_dest_codec, rtpe_config.audio_buffer_length,
-					rtpe_config.audio_buffer_delay);
+					rtpe_config.audio_buffer_delay,
+					a.flags ? a.flags->codec_set : str_case_value_ht_null());
 			if (a.flags && (a.flags->early_media || a.flags->opmode == OP_ANSWER))
 				audio_player_activate(sink);
 		}
diff --git a/daemon/media_player.c b/daemon/media_player.c
index 6d437eda1..346fad074 100644
--- a/daemon/media_player.c
+++ b/daemon/media_player.c
@@ -572,7 +572,7 @@ static void media_player_kernel_player_start(struct media_player *mp) {
 	media_player_kernel_player_start_now(mp);
 }
 
-static void media_player_cached_reader_start(struct media_player *mp) {
+static void media_player_cached_reader_start(struct media_player *mp, str_case_value_ht codec_set) {
 	struct media_player_cache_entry *entry = mp->cache_entry;
 	const rtp_payload_type *dst_pt = &entry->coder.handler->dest_pt;
 
@@ -583,7 +583,7 @@ static void media_player_cached_reader_start(struct media_player *mp) {
 
 	// create dummy codec handler and start timer
 
-	mp->coder.handler = codec_handler_make_dummy(&entry->coder.handler->dest_pt, mp->media);
+	mp->coder.handler = codec_handler_make_dummy(&entry->coder.handler->dest_pt, mp->media, codec_set);
 
 	mp->run_func = media_player_read_decoded_packet;
 	mp->next_run = rtpe_now;
@@ -611,7 +611,7 @@ static void cache_packet_free(struct media_player_cache_packet *p) {
 // returns: true = entry exists, decoding handled separately, use entry for playback
 //          false = no entry exists, OR entry is a new one, proceed to open decoder, then call _play_start
 static bool media_player_cache_get_entry(struct media_player *mp,
-		const rtp_payload_type *dst_pt)
+		const rtp_payload_type *dst_pt, str_case_value_ht codec_set)
 {
 	if (!rtpe_config.player_cache)
 		return false;
@@ -630,7 +630,7 @@ static bool media_player_cache_get_entry(struct media_player *mp,
 
 	bool ret = true; // entry exists, use cached data
 	if (entry) {
-		media_player_cached_reader_start(mp);
+		media_player_cached_reader_start(mp, codec_set);
 		goto out;
 	}
 
@@ -789,7 +789,9 @@ static int media_player_packet_cache(encoder_t *enc, void *u1, void *u2) {
 // do have a cache entry, initialise it, set up the thread, take over decoding, and then proceed as a
 // media player consuming the data from the decoder thread.
 // returns: false = continue normally decode in-thread, true = take data from other thread
-static bool media_player_cache_entry_init(struct media_player *mp, const rtp_payload_type *dst_pt) {
+static bool media_player_cache_entry_init(struct media_player *mp, const rtp_payload_type *dst_pt,
+		str_case_value_ht codec_set)
+{
 	struct media_player_cache_entry *entry = mp->cache_entry;
 	if (!entry)
 		return false;
@@ -804,7 +806,7 @@ static bool media_player_cache_entry_init(struct media_player *mp, const rtp_pay
 	// use low priority (10 nice)
 	thread_create_detach_prio(media_player_cache_entry_decoder_thread, entry, NULL, 10, "mp decoder");
 
-	media_player_cached_reader_start(mp);
+	media_player_cached_reader_start(mp, codec_set);
 
 	return true;
 }
@@ -870,7 +872,7 @@ static int media_player_setup_common(struct media_player *mp, const rtp_payload_
 
 // used for generic playback (audio_player, t38_gateway)
 int media_player_setup(struct media_player *mp, const rtp_payload_type *src_pt,
-		const rtp_payload_type *dst_pt)
+		const rtp_payload_type *dst_pt, str_case_value_ht codec_set)
 {
 	int ret = media_player_setup_common(mp, src_pt, &dst_pt);
 	if (ret)
@@ -878,7 +880,7 @@ int media_player_setup(struct media_player *mp, const rtp_payload_type *src_pt,
 
 	if (!mp->coder.handler)
 		mp->coder.handler = codec_handler_make_playback(src_pt, dst_pt, mp->sync_ts, mp->media,
-				mp->ssrc_out->parent->h.ssrc);
+				mp->ssrc_out->parent->h.ssrc, codec_set);
 	if (!mp->coder.handler)
 		return -1;
 
@@ -886,7 +888,7 @@ int media_player_setup(struct media_player *mp, const rtp_payload_type *src_pt,
 }
 // used for "play media" player
 static int __media_player_setup_internal(struct media_player *mp, const rtp_payload_type *src_pt,
-		const rtp_payload_type *dst_pt)
+		const rtp_payload_type *dst_pt, str_case_value_ht codec_set)
 {
 	int ret = media_player_setup_common(mp, src_pt, &dst_pt);
 	if (ret)
@@ -894,14 +896,16 @@ static int __media_player_setup_internal(struct media_player *mp, const rtp_payl
 
 	if (!mp->coder.handler)
 		mp->coder.handler = codec_handler_make_media_player(src_pt, dst_pt, mp->sync_ts, mp->media,
-				mp->ssrc_out->parent->h.ssrc);
+				mp->ssrc_out->parent->h.ssrc, codec_set);
 	if (!mp->coder.handler)
 		return -1;
 
 	return 0;
 }
 
-static int __ensure_codec_handler(struct media_player *mp, const rtp_payload_type *dst_pt) {
+static int __ensure_codec_handler(struct media_player *mp, const rtp_payload_type *dst_pt,
+		str_case_value_ht codec_set)
+{
 	if (mp->coder.handler)
 		return 0;
 
@@ -917,7 +921,7 @@ static int __ensure_codec_handler(struct media_player *mp, const rtp_payload_typ
 	src_pt.clock_rate = mp->coder.avstream->CODECPAR->sample_rate;
 	codec_init_payload_type(&src_pt, MT_AUDIO);
 
-	if (__media_player_setup_internal(mp, &src_pt, dst_pt))
+	if (__media_player_setup_internal(mp, &src_pt, dst_pt, codec_set))
 		return -1;
 
 	mp->coder.duration = mp->coder.avstream->duration * 1000 * mp->coder.avstream->time_base.num
@@ -1064,7 +1068,9 @@ static const rtp_payload_type *media_player_play_init(struct media_player *mp) {
 
 
 // call->master_lock held in W
-static bool media_player_play_start(struct media_player *mp, const rtp_payload_type *dst_pt) {
+static bool media_player_play_start(struct media_player *mp, const rtp_payload_type *dst_pt,
+		str_case_value_ht codec_set)
+{
 	// needed to have usable duration for some formats. ignore errors.
 	if (!mp->coder.fmtctx->streams || !mp->coder.fmtctx->streams[0])
 		avformat_find_stream_info(mp->coder.fmtctx, NULL);
@@ -1075,13 +1081,13 @@ static bool media_player_play_start(struct media_player *mp, const rtp_payload_t
 		return false;
 	}
 
-	if (__ensure_codec_handler(mp, dst_pt))
+	if (__ensure_codec_handler(mp, dst_pt, codec_set))
 		return false;
 
 	if (mp->opts.block_egress)
 		MEDIA_SET(mp->media, BLOCK_EGRESS);
 
-	if (media_player_cache_entry_init(mp, dst_pt))
+	if (media_player_cache_entry_init(mp, dst_pt, codec_set))
 		return true;
 
 	mp->next_run = rtpe_now;
@@ -1114,7 +1120,7 @@ static mp_cached_code __media_player_init_file(struct media_player *mp, const st
 
 	mp->opts = opts;
 
-	if (media_player_cache_get_entry(mp, dst_pt))
+	if (media_player_cache_get_entry(mp, dst_pt, opts.codec_set))
 		return MPC_CACHED;
 
 	char file_s[PATH_MAX];
@@ -1145,7 +1151,7 @@ bool media_player_play_file(struct media_player *mp, const str *file, media_play
 	if (ret == MPC_ERR)
 		return false;
 
-	return media_player_play_start(mp, dst_pt);
+	return media_player_play_start(mp, dst_pt, opts.codec_set);
 #else
 	return false;
 #endif
@@ -1219,14 +1225,14 @@ static mp_cached_code __media_player_init_blob_id(struct media_player *mp, const
 		mp->cache_index.type = MP_DB;
 		mp->cache_index.db_id = db_id;
 
-		if (media_player_cache_get_entry(mp, dst_pt))
+		if (media_player_cache_get_entry(mp, dst_pt, opts.codec_set))
 			return MPC_CACHED;
 	}
 	else {
 		mp->cache_index.type = MP_BLOB;
 		mp->cache_index.file = str_dup_str(blob);
 
-		if (media_player_cache_get_entry(mp, dst_pt))
+		if (media_player_cache_get_entry(mp, dst_pt, opts.codec_set))
 			return MPC_CACHED;
 	}
 
@@ -1282,7 +1288,7 @@ bool media_player_play_blob(struct media_player *mp, const str *blob, media_play
 	if (ret == MPC_ERR)
 		return false;
 
-	return media_player_play_start(mp, dst_pt);
+	return media_player_play_start(mp, dst_pt, opts.codec_set);
 }
 
 // call->master_lock held in W
@@ -1389,7 +1395,7 @@ bool media_player_play_db(struct media_player *mp, long long id, media_player_op
 	if (ret == MPC_ERR)
 		return false;
 
-	return media_player_play_start(mp, dst_pt);
+	return media_player_play_start(mp, dst_pt, opts.codec_set);
 }
 
 // call->master_lock held in W
@@ -1513,7 +1519,7 @@ bool media_player_start(struct media_player *mp) {
 	if (!dst_pt)
 		return false;
 
-	return media_player_play_start(mp, dst_pt);
+	return media_player_play_start(mp, dst_pt, str_case_value_ht_null());
 #else
 	return false;
 #endif
diff --git a/daemon/t38.c b/daemon/t38.c
index 8e285655d..d0d397886 100644
--- a/daemon/t38.c
+++ b/daemon/t38.c
@@ -457,13 +457,13 @@ err:
 
 
 // call is locked in W
-void t38_gateway_start(struct t38_gateway *tg) {
+void t38_gateway_start(struct t38_gateway *tg, str_case_value_ht codec_set) {
 	if (!tg)
 		return;
 
 	// set up our player first
 	media_player_set_media(tg->pcm_player, tg->pcm_media);
-	if (media_player_setup(tg->pcm_player, &tg->pcm_pt, NULL))
+	if (media_player_setup(tg->pcm_player, &tg->pcm_pt, NULL, codec_set))
 		return;
 
 	// now start our player if we can or should
diff --git a/docs/ng_control_protocol.md b/docs/ng_control_protocol.md
index 9ec9ee68a..8a3e439cd 100644
--- a/docs/ng_control_protocol.md
+++ b/docs/ng_control_protocol.md
@@ -1974,6 +1974,8 @@ Starts playback of a provided media file to the selected call participant. The f
 can be anything that is supported by *ffmpeg*, for example a `.wav` or `.mp3` file. It will automatically
 be resampled and transcoded to the appropriate sampling rate and codec. The selected participant's first
 listed (preferred) codec that is supported will be chosen for this purpose.
+Encoder parameters such as bit rate can be set via the `codec-set` list
+described above.
 
 Media files can be provided through one of these keys:
 
diff --git a/include/audio_player.h b/include/audio_player.h
index 582f15571..eecde3b28 100644
--- a/include/audio_player.h
+++ b/include/audio_player.h
@@ -21,7 +21,7 @@ struct audio_player;
 struct call_media;
 
 bool audio_player_setup(struct call_media *, const rtp_payload_type *,
-		unsigned int size_ms, unsigned int delay_ms);
+		unsigned int size_ms, unsigned int delay_ms, str_case_value_ht codec_set);
 void audio_player_activate(struct call_media *);
 void audio_player_free(struct call_media *);
 
diff --git a/include/codec.h b/include/codec.h
index b5db0f779..3208f4294 100644
--- a/include/codec.h
+++ b/include/codec.h
@@ -105,10 +105,13 @@ struct codec_handler *codec_handler_get(struct call_media *, int payload_type, s
 		struct sink_handler *);
 void codec_handlers_free(struct call_media *);
 struct codec_handler *codec_handler_make_playback(const rtp_payload_type *src_pt,
-		const rtp_payload_type *dst_pt, unsigned long ts, struct call_media *, uint32_t ssrc);
+		const rtp_payload_type *dst_pt, unsigned long ts, struct call_media *, uint32_t ssrc,
+		str_case_value_ht codec_set);
 struct codec_handler *codec_handler_make_media_player(const rtp_payload_type *src_pt,
-		const rtp_payload_type *dst_pt, unsigned long ts, struct call_media *, uint32_t ssrc);
-struct codec_handler *codec_handler_make_dummy(const rtp_payload_type *dst_pt, struct call_media *media);
+		const rtp_payload_type *dst_pt, unsigned long ts, struct call_media *, uint32_t ssrc,
+		str_case_value_ht codec_set);
+struct codec_handler *codec_handler_make_dummy(const rtp_payload_type *dst_pt, struct call_media *media,
+		str_case_value_ht codec_set);
 void codec_calc_jitter(struct ssrc_ctx *, unsigned long ts, unsigned int clockrate, const struct timeval *);
 void codec_update_all_handlers(struct call_monologue *ml);
 void codec_update_all_source_handlers(struct call_monologue *ml, const sdp_ng_flags *flags);
diff --git a/include/media_player.h b/include/media_player.h
index 88f971864..c72548ec4 100644
--- a/include/media_player.h
+++ b/include/media_player.h
@@ -20,6 +20,7 @@ struct media_player;
 typedef struct {
 	long long start_pos;
 	int repeat;
+	str_case_value_ht codec_set;
 	unsigned int block_egress:1;
 } media_player_opts_t;
 
@@ -126,7 +127,7 @@ long long media_player_stop(struct media_player *);
 bool media_player_is_active(struct call_monologue *);
 
 int media_player_setup(struct media_player *mp, const rtp_payload_type *src_pt,
-		const rtp_payload_type *dst_pt);
+		const rtp_payload_type *dst_pt, str_case_value_ht codec_set);
 void media_player_set_media(struct media_player *mp, struct call_media *media);
 bool media_player_pt_match(const struct media_player *mp, const rtp_payload_type *src_pt,
 		const rtp_payload_type *dst_pt);
diff --git a/include/t38.h b/include/t38.h
index cc7a3d4bd..f12d26261 100644
--- a/include/t38.h
+++ b/include/t38.h
@@ -69,7 +69,7 @@ struct t38_gateway {
 void t38_init(void);
 
 int t38_gateway_pair(struct call_media *t38_media, struct call_media *pcm_media, const struct t38_options *);
-void t38_gateway_start(struct t38_gateway *);
+void t38_gateway_start(struct t38_gateway *, str_case_value_ht codec_set);
 int t38_gateway_input_samples(struct t38_gateway *, int16_t amp[], int len);
 int t38_gateway_input_udptl(struct t38_gateway *, const str *);
 void t38_gateway_stop(struct t38_gateway *);
@@ -88,7 +88,7 @@ INLINE void t38_gateway_put(struct t38_gateway **tp) {
 
 // stubs
 INLINE void t38_init(void) { }
-INLINE void t38_gateway_start(struct t38_gateway *tg) { }
+INLINE void t38_gateway_start(struct t38_gateway *tg, str_case_value_ht codec_set) { }
 INLINE void t38_gateway_stop(struct t38_gateway *tg) { }
 INLINE void t38_gateway_put(struct t38_gateway **tp) { }