diff --git a/libavcodec/mpeg4video_parser.c b/libavcodec/mpeg4video_parser.c
index 5d0f47ec13..a882f06003 100644
--- a/libavcodec/mpeg4video_parser.c
+++ b/libavcodec/mpeg4video_parser.c
@@ -99,6 +99,7 @@ static av_cold int mpeg4video_parse_init(AVCodecParserContext *s)
     if (!pc->enc)
         return -1;
     pc->first_picture = 1;
+    pc->enc->quant_precision=5;
     return 0;
 }