diff --git a/libavcodec/internal.h b/libavcodec/internal.h
index 5096ffa1d9..5f964148fd 100644
--- a/libavcodec/internal.h
+++ b/libavcodec/internal.h
@@ -83,7 +83,7 @@
 #define FF_QSCALE_TYPE_H264  2
 #define FF_QSCALE_TYPE_VP56  3
 
-#define FF_SANE_NB_CHANNELS 256U
+#define FF_SANE_NB_CHANNELS 512U
 
 #define FF_SIGNBIT(x) ((x) >> CHAR_BIT * sizeof(x) - 1)