https://github.com/alexkay/spek/commit/ee8bc49ed4a93a14a933ecb0eebfe424111f8413

Index: spek-0.8.3/src/spek-audio.cc
===================================================================
--- spek-0.8.3.orig/src/spek-audio.cc
+++ spek-0.8.3/src/spek-audio.cc
@@ -202,7 +202,7 @@ AudioFileImpl::AudioFileImpl(
     this->packet.data = nullptr;
     this->packet.size = 0;
     this->offset = 0;
-    this->frame = avcodec_alloc_frame();
+    this->frame = av_frame_alloc();
     this->buffer_size = 0;
     this->buffer = nullptr;
     this->frames_per_interval = 0;
@@ -218,7 +218,7 @@ AudioFileImpl::~AudioFileImpl()
     if (this->frame) {
         // TODO: Remove this check after Debian switches to libav 9.
 #if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(54, 28, 0)
-        avcodec_free_frame(&this->frame);
+        av_frame_free(&this->frame);
 #else
         av_freep(&this->frame);
 #endif
@@ -258,7 +258,7 @@ int AudioFileImpl::read()
 
     for (;;) {
         while (this->packet.size > 0) {
-            avcodec_get_frame_defaults(this->frame);
+	    av_frame_unref(this->frame);
             auto codec_context = this->format_context->streams[this->audio_stream]->codec;
             int got_frame = 0;
             int len = avcodec_decode_audio4(codec_context, this->frame, &got_frame, &this->packet);