diff --git a/transcode.c b/transcode-old.c
index 27b6277..b142982 100644
--- a/transcode.c
+++ b/transcode-old.c
@@ -155,7 +155,7 @@ static void convert_frame(struct SwrContext *swr, AVCodecContext *codec,
 
 static bool is_audio_stream(const AVStream *stream)
 {
-	if (stream->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)
+	if (stream->codec->codec_type == AVMEDIA_TYPE_AUDIO)
 		return true;
 
 	return false;
@@ -175,6 +175,8 @@ static int decode_audio(struct audio_buffer *audio_buf, s16 **data, int *size)
 	int stream_index = -1;
 	int err;
 
+	av_register_all();
+
 	fmt_ctx = avformat_alloc_context();
 	avio_ctx_buffer = av_malloc(AVIO_CTX_BUF_SZ);
 	avio_ctx = avio_alloc_context(avio_ctx_buffer, AVIO_CTX_BUF_SZ, 0,
@@ -208,9 +210,7 @@ static int decode_audio(struct audio_buffer *audio_buf, s16 **data, int *size)
 	}
 
 	stream = fmt_ctx->streams[stream_index];
-	codec = avcodec_alloc_context3(
-			avcodec_find_decoder(stream->codecpar->codec_id));
-	avcodec_parameters_to_context(codec, stream->codecpar);
+	codec = stream->codec;
 	err = avcodec_open2(codec, avcodec_find_decoder(codec->codec_id),
 							NULL);
 	if (err) {
@@ -250,10 +250,10 @@ static int decode_audio(struct audio_buffer *audio_buf, s16 **data, int *size)
 	*data = NULL;
 	*size = 0;
 	while (av_read_frame(fmt_ctx, &packet) >= 0) {
-		avcodec_send_packet(codec, &packet);
+		int got_frame;
 
-		err = avcodec_receive_frame(codec, frame);
-		if (err == AVERROR(EAGAIN))
+		avcodec_decode_audio4(codec, frame, &got_frame, &packet);
+		if (!got_frame)
 			continue;
 
 		convert_frame(swr, codec, frame, data, size, false);