diff --git a/src/include/switch_loadable_module.h b/src/include/switch_loadable_module.h
index 946bd97f86..d1c578b931 100644
--- a/src/include/switch_loadable_module.h
+++ b/src/include/switch_loadable_module.h
@@ -456,7 +456,7 @@ static inline void switch_core_codec_add_implementation(switch_memory_pool_t *po
 
 static inline switch_bool_t switch_core_codec_ready(switch_codec_t *codec)
 {
-	return (codec && codec->implementation && (codec->flags & SWITCH_CODEC_FLAG_READY)) ? SWITCH_TRUE : SWITCH_FALSE;
+	return (codec && (codec->flags & SWITCH_CODEC_FLAG_READY) && codec->mutex && codec->codec_interface && codec->implementation) ? SWITCH_TRUE : SWITCH_FALSE;
 }
 
 
diff --git a/src/switch_core_codec.c b/src/switch_core_codec.c
index d8fdeeca43..ba84b0301c 100644
--- a/src/switch_core_codec.c
+++ b/src/switch_core_codec.c
@@ -47,17 +47,14 @@ SWITCH_DECLARE(void) switch_core_session_unset_read_codec(switch_core_session_t
 	switch_mutex_t *mutex = NULL;
 
 	switch_mutex_lock(session->codec_read_mutex);
-	if (session->read_codec)
-		mutex = session->read_codec->mutex;
-	if (mutex)
-		switch_mutex_lock(mutex);
+	if (session->read_codec) mutex = session->read_codec->mutex;
+	if (mutex) switch_mutex_lock(mutex);
 	session->real_read_codec = session->read_codec = NULL;
 	session->raw_read_frame.codec = session->read_codec;
 	session->raw_write_frame.codec = session->read_codec;
 	session->enc_read_frame.codec = session->read_codec;
 	session->enc_write_frame.codec = session->read_codec;
-	if (mutex)
-		switch_mutex_unlock(mutex);
+	if (mutex) switch_mutex_unlock(mutex);
 	switch_mutex_unlock(session->codec_read_mutex);
 }
 
@@ -86,13 +83,10 @@ SWITCH_DECLARE(void) switch_core_session_unset_write_codec(switch_core_session_t
 	switch_mutex_t *mutex = NULL;
 
 	switch_mutex_lock(session->codec_write_mutex);
-	if (session->write_codec)
-		mutex = session->write_codec->mutex;
-	if (mutex)
-		switch_mutex_lock(mutex);
+	if (session->write_codec) mutex = session->write_codec->mutex;
+	if (mutex) switch_mutex_lock(mutex);
 	session->real_write_codec = session->write_codec = NULL;
-	if (mutex)
-		switch_mutex_unlock(mutex);
+	if (mutex) switch_mutex_unlock(mutex);
 	switch_mutex_unlock(session->codec_write_mutex);
 }
 
@@ -495,6 +489,8 @@ SWITCH_DECLARE(switch_status_t) switch_core_codec_copy(switch_codec_t *codec, sw
 
 	new_codec->implementation->init(new_codec, new_codec->flags, NULL);
 
+	switch_mutex_init(&new_codec->mutex, SWITCH_MUTEX_NESTED, new_codec->memory_pool);
+
 	return SWITCH_STATUS_SUCCESS;
 }
 
@@ -598,12 +594,10 @@ SWITCH_DECLARE(switch_status_t) switch_core_codec_encode(switch_codec_t *codec,
 		return SWITCH_STATUS_NOT_INITALIZED;
 	}
 
-	if (codec->mutex)
-		switch_mutex_lock(codec->mutex);
+	if (codec->mutex) switch_mutex_lock(codec->mutex);
 	status = codec->implementation->encode(codec, other_codec, decoded_data, decoded_data_len,
 										   decoded_rate, encoded_data, encoded_data_len, encoded_rate, flag);
-	if (codec->mutex)
-		switch_mutex_unlock(codec->mutex);
+	if (codec->mutex) switch_mutex_unlock(codec->mutex);
 
 	return status;
 
@@ -624,6 +618,7 @@ SWITCH_DECLARE(switch_status_t) switch_core_codec_decode(switch_codec_t *codec,
 
 	if (!codec->implementation || !switch_core_codec_ready(codec)) {
 		switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Codec is not initialized!\n");
+		abort();
 		return SWITCH_STATUS_NOT_INITALIZED;
 	}
 
@@ -641,12 +636,10 @@ SWITCH_DECLARE(switch_status_t) switch_core_codec_decode(switch_codec_t *codec,
 		}
 	}
 	
-	if (codec->mutex)
-		switch_mutex_lock(codec->mutex);
+	if (codec->mutex) switch_mutex_lock(codec->mutex);
 	status = codec->implementation->decode(codec, other_codec, encoded_data, encoded_data_len, encoded_rate,
 										   decoded_data, decoded_data_len, decoded_rate, flag);
-	if (codec->mutex)
-		switch_mutex_unlock(codec->mutex);
+	if (codec->mutex) switch_mutex_unlock(codec->mutex);
 
 	return status;
 }
@@ -659,7 +652,7 @@ SWITCH_DECLARE(switch_status_t) switch_core_codec_destroy(switch_codec_t *codec)
 
 	switch_assert(codec != NULL);
 
-	if (!codec->implementation || !switch_core_codec_ready(codec)) {
+	if (!switch_core_codec_ready(codec)) {
 		switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING, "Codec is not initialized!\n");
 		return SWITCH_STATUS_NOT_INITALIZED;
 	}
@@ -671,21 +664,27 @@ SWITCH_DECLARE(switch_status_t) switch_core_codec_destroy(switch_codec_t *codec)
 	pool = codec->memory_pool;
 	mutex = codec->mutex;
 
-	if (mutex)
+	if (mutex) {
 		switch_mutex_lock(mutex);
+		switch_clear_flag(codec, SWITCH_CODEC_FLAG_READY);
+		switch_mutex_unlock(mutex);
+		switch_mutex_lock(mutex);
+	}
 
 	codec->implementation->destroy(codec);
-	switch_clear_flag(codec, SWITCH_CODEC_FLAG_READY);
-
+	
 	UNPROTECT_INTERFACE(codec->codec_interface);
 
-	if (mutex)
+	if (mutex) {
 		switch_mutex_unlock(mutex);
-
+	}
+	
 	if (free_pool) {
 		switch_core_destroy_memory_pool(&pool);
 	}
 
+	memset(codec, 0, sizeof(*codec));
+	
 	return SWITCH_STATUS_SUCCESS;
 }
 
diff --git a/src/switch_core_io.c b/src/switch_core_io.c
index 7d75835ac8..1eb224bda1 100644
--- a/src/switch_core_io.c
+++ b/src/switch_core_io.c
@@ -127,7 +127,7 @@ SWITCH_DECLARE(switch_status_t) switch_core_session_read_frame(switch_core_sessi
 
   top:
 
-	if (switch_channel_down(session->channel)) {
+	if (switch_channel_down(session->channel) || !switch_core_codec_ready(session->read_codec)) {
 		*frame = NULL;
 		status = SWITCH_STATUS_FALSE;
 		goto even_more_done;
@@ -170,13 +170,19 @@ SWITCH_DECLARE(switch_status_t) switch_core_session_read_frame(switch_core_sessi
 			}
 		}
 
-		if (!SWITCH_READ_ACCEPTABLE(status) || !session->read_codec || !session->read_codec->mutex) {
+		if (!SWITCH_READ_ACCEPTABLE(status) || !session->read_codec || !switch_core_codec_ready(session->read_codec)) {
 			*frame = NULL;
 			return SWITCH_STATUS_FALSE;
 		}
 
 		switch_mutex_lock(session->codec_read_mutex);
 		switch_mutex_lock(session->read_codec->mutex);
+		if (!switch_core_codec_ready(session->read_codec)) {
+			*frame = NULL;
+			status = SWITCH_STATUS_FALSE;
+			goto even_more_done;			
+		}
+
 	}
 
 	if (status != SWITCH_STATUS_SUCCESS) {
@@ -273,10 +279,12 @@ SWITCH_DECLARE(switch_status_t) switch_core_session_read_frame(switch_core_sessi
 			} else {
 				switch_codec_t *use_codec = read_frame->codec;
 				if (do_bugs) {
+					switch_thread_rwlock_wrlock(session->bug_rwlock);
 					if (!switch_core_codec_ready(&session->bug_codec)) {
 						switch_core_codec_copy(read_frame->codec, &session->bug_codec, NULL);
 					}
 					use_codec = &session->bug_codec;
+					switch_thread_rwlock_unlock(session->bug_rwlock);
 				}
 
 				status = switch_core_codec_decode(use_codec,
@@ -630,7 +638,7 @@ SWITCH_DECLARE(switch_status_t) switch_core_session_write_frame(switch_core_sess
 
 	switch_mutex_lock(session->codec_write_mutex);
 
-	if (!(session->write_codec && session->write_codec->mutex && frame->codec) ||
+	if (!(switch_core_codec_ready(session->write_codec) && frame->codec) ||
 		!switch_channel_ready(session->channel) || !switch_channel_media_ready(session->channel)) {
 		switch_mutex_unlock(session->codec_write_mutex);
 		return SWITCH_STATUS_FALSE;
@@ -639,7 +647,7 @@ SWITCH_DECLARE(switch_status_t) switch_core_session_write_frame(switch_core_sess
 	switch_mutex_lock(session->write_codec->mutex);
 	switch_mutex_lock(frame->codec->mutex);
 
-	if (!frame->codec->implementation || !session->write_codec->implementation) goto error;
+	if (!(switch_core_codec_ready(session->write_codec) && switch_core_codec_ready(frame->codec))) goto error;
 	
 	if ((session->write_codec && frame->codec && session->write_codec->implementation != frame->codec->implementation)) {
 		if (session->write_impl.codec_id == frame->codec->implementation->codec_id ||
diff --git a/src/switch_core_media_bug.c b/src/switch_core_media_bug.c
index b2bf1d0e59..7170969be2 100644
--- a/src/switch_core_media_bug.c
+++ b/src/switch_core_media_bug.c
@@ -47,11 +47,6 @@ static void switch_core_media_bug_destroy(switch_media_bug_t *bug)
 		switch_buffer_destroy(&bug->raw_write_buffer);
 	}
 
-	if (switch_core_codec_ready(&bug->session->bug_codec)) {
-		switch_core_codec_destroy(&bug->session->bug_codec);
-		memset(&bug->session->bug_codec, 0, sizeof(bug->session->bug_codec));
-	}
-
 	if (switch_event_create(&event, SWITCH_EVENT_MEDIA_BUG_STOP) == SWITCH_STATUS_SUCCESS) {
 		switch_event_add_header(event, SWITCH_STACK_BOTTOM, "Media-Bug-Function", "%s", bug->function);
 		switch_event_add_header(event, SWITCH_STACK_BOTTOM, "Media-Bug-Target", "%s", bug->target);
@@ -424,7 +419,6 @@ SWITCH_DECLARE(switch_status_t) switch_core_media_bug_remove_all(switch_core_ses
 
 	if (switch_core_codec_ready(&session->bug_codec)) {
 		switch_core_codec_destroy(&session->bug_codec);
-		memset(&session->bug_codec, 0, sizeof(session->bug_codec));
 	}
 
 	return status;
@@ -458,8 +452,8 @@ SWITCH_DECLARE(switch_status_t) switch_core_media_bug_remove(switch_core_session
 	switch_media_bug_t *bp = NULL, *last = NULL;
 	switch_status_t status = SWITCH_STATUS_FALSE;
 
+	switch_thread_rwlock_wrlock(session->bug_rwlock);
 	if (session->bugs) {
-		switch_thread_rwlock_wrlock(session->bug_rwlock);
 		for (bp = session->bugs; bp; bp = bp->next) {
 			if ((!bp->thread_id || bp->thread_id == switch_thread_self()) && bp->ready && bp == *bug) {
 				if (last) {
@@ -472,17 +466,18 @@ SWITCH_DECLARE(switch_status_t) switch_core_media_bug_remove(switch_core_session
 
 			last = bp;
 		}
-		switch_thread_rwlock_unlock(session->bug_rwlock);
-		if (bp) {
-			status = switch_core_media_bug_close(&bp);
-		}
 	}
 
 	if (!session->bugs && switch_core_codec_ready(&session->bug_codec)) {
 		switch_core_codec_destroy(&session->bug_codec);
-		memset(&session->bug_codec, 0, sizeof(session->bug_codec));
 	}
 
+	switch_thread_rwlock_unlock(session->bug_rwlock);
+
+	if (bp) {
+		status = switch_core_media_bug_close(&bp);
+	}
+	
 	return status;
 }
 
@@ -496,8 +491,8 @@ SWITCH_DECLARE(uint32_t) switch_core_media_bug_prune(switch_core_session_t *sess
 
   top:
 
+	switch_thread_rwlock_wrlock(session->bug_rwlock);
 	if (session->bugs) {
-		switch_thread_rwlock_wrlock(session->bug_rwlock);
 		for (bp = session->bugs; bp; bp = bp->next) {
 			if (switch_core_media_bug_test_flag(bp, SMBF_PRUNE)) {
 				if (last) {
@@ -510,19 +505,20 @@ SWITCH_DECLARE(uint32_t) switch_core_media_bug_prune(switch_core_session_t *sess
 
 			last = bp;
 		}
-		switch_thread_rwlock_unlock(session->bug_rwlock);
-		if (bp) {
-			status = switch_core_media_bug_close(&bp);
-			ttl++;
-			goto top;
-		}
 	}
 
 	if (!session->bugs && switch_core_codec_ready(&session->bug_codec)) {
 		switch_core_codec_destroy(&session->bug_codec);
-		memset(&session->bug_codec, 0, sizeof(session->bug_codec));
 	}
 
+	switch_thread_rwlock_unlock(session->bug_rwlock);
+
+	if (bp) {
+		status = switch_core_media_bug_close(&bp);
+		ttl++;
+		goto top;
+	}
+	
 	return ttl;
 }
 
@@ -532,9 +528,8 @@ SWITCH_DECLARE(switch_status_t) switch_core_media_bug_remove_callback(switch_cor
 	switch_media_bug_t *cur = NULL, *bp = NULL, *last = NULL;
 	int total = 0;
 
+	switch_thread_rwlock_wrlock(session->bug_rwlock);
 	if (session->bugs) {
-		switch_thread_rwlock_wrlock(session->bug_rwlock);
-
 		bp = session->bugs;
 		while (bp) {
 			cur = bp;
@@ -553,14 +548,15 @@ SWITCH_DECLARE(switch_status_t) switch_core_media_bug_remove_callback(switch_cor
 				last = cur;
 			}
 		}
-		switch_thread_rwlock_unlock(session->bug_rwlock);
 	}
 
 	if (!session->bugs && switch_core_codec_ready(&session->bug_codec)) {
 		switch_core_codec_destroy(&session->bug_codec);
-		memset(&session->bug_codec, 0, sizeof(session->bug_codec));
 	}
 
+	switch_thread_rwlock_unlock(session->bug_rwlock);
+
+
 	return total ? SWITCH_STATUS_SUCCESS : SWITCH_STATUS_FALSE;
 }