diff --git a/libavformat/av1.c b/libavformat/av1.c
index 5ad9222900..4ff4bffddf 100644
--- a/libavformat/av1.c
+++ b/libavformat/av1.c
@@ -76,7 +76,7 @@ int ff_av1_filter_obus_buf(const uint8_t *buf, uint8_t **out, int *size)
     av_freep(out);
     *size = avio_close_dyn_buf(pb, out);
 
-    return ret;
+    return 0;
 }
 
 static inline void uvlc(GetBitContext *gb)
diff --git a/libavformat/av1.h b/libavformat/av1.h
index 9354889afe..0578435376 100644
--- a/libavformat/av1.h
+++ b/libavformat/av1.h
@@ -66,8 +66,8 @@ int ff_av1_filter_obus(AVIOContext *pb, const uint8_t *buf, int size);
  * @param size size of the input data buffer. The size of the resulting output
                data buffer will be written here
  *
- * @return the amount of bytes written in case of success, a negative AVERROR
- *         code in case of failure. On failure, out and size are unchanged
+ * @return 0 in case of success, a negative AVERROR code in case of failure.
+ *         On failure, out and size are unchanged
  */
 int ff_av1_filter_obus_buf(const uint8_t *buf, uint8_t **out, int *size);
 
diff --git a/libavformat/hevc.c b/libavformat/hevc.c
index db931d2017..f621cb2f19 100644
--- a/libavformat/hevc.c
+++ b/libavformat/hevc.c
@@ -1062,7 +1062,7 @@ int ff_hevc_annexb2mp4_buf(const uint8_t *buf_in, uint8_t **buf_out,
 
     *size = avio_close_dyn_buf(pb, buf_out);
 
-    return ret;
+    return 0;
 }
 
 int ff_isom_write_hvcc(AVIOContext *pb, const uint8_t *data,
diff --git a/libavformat/hevc.h b/libavformat/hevc.h
index 1e355cd34a..bb144397c0 100644
--- a/libavformat/hevc.h
+++ b/libavformat/hevc.h
@@ -71,8 +71,8 @@ int ff_hevc_annexb2mp4(AVIOContext *pb, const uint8_t *buf_in,
  *        or to discard them (non-zero)
  * @param ps_count address of the variable where the number of discarded
  *        parameter set NAL units shall be written, may be NULL
- * @return the amount (in bytes) of data written in case of success, a negative
- *         value corresponding to an AVERROR code in case of failure
+ * @return 0 in case of success, a negative value corresponding to an AVERROR
+ *         code in case of failure
  */
 int ff_hevc_annexb2mp4_buf(const uint8_t *buf_in, uint8_t **buf_out,
                            int *size, int filter_ps, int *ps_count);