diff --git a/libavcodec/metasound.c b/libavcodec/metasound.c
index 9cda336904..5c65f038d5 100644
--- a/libavcodec/metasound.c
+++ b/libavcodec/metasound.c
@@ -226,7 +226,7 @@ static int metasound_read_bitstream(AVCodecContext *avctx, TwinVQContext *tctx,
         }
     }
 
-    return 0;
+    return (get_bits_count(&gb) + 7) / 8;
 }
 
 typedef struct MetasoundProps {
diff --git a/libavcodec/twinvqdec.c b/libavcodec/twinvqdec.c
index 067df56d73..5e565dbb9f 100644
--- a/libavcodec/twinvqdec.c
+++ b/libavcodec/twinvqdec.c
@@ -312,7 +312,7 @@ static int twinvq_read_bitstream(AVCodecContext *avctx, TwinVQContext *tctx,
         }
     }
 
-    return 0;
+    return (get_bits_count(&gb) + 7) / 8;
 }
 
 static av_cold int twinvq_decode_init(AVCodecContext *avctx)