avfilter/palettegen: raise cache size from 64k to 512k

(or 32k to 256k in 32-bit)

This is similar to a00bab347518d4824d51ec7078f1d84ca097c53b

diff --git a/libavfilter/vf_palettegen.c b/libavfilter/vf_palettegen.c
index 1f1e90f..323fa53 100644 (file)
--- a/libavfilter/vf_palettegen.c
+++ b/libavfilter/vf_palettegen.c
@@ -52,7 +52,7 @@ enum {
     NB_STATS_MODE
 };
 
-#define NBITS 4
+#define NBITS 5
 #define HIST_SIZE (1<<(3*NBITS))
 
 typedef struct {