diff --git a/libavcodec/mpeg12dec.c b/libavcodec/mpeg12dec.c
index 34dbebf68e..36c993a3c1 100644
--- a/libavcodec/mpeg12dec.c
+++ b/libavcodec/mpeg12dec.c
@@ -2123,7 +2123,7 @@ static int mpeg1_decode_sequence(AVCodecContext *avctx,
     s->frame_rate_index = get_bits(&s->gb, 4);
     if (s->frame_rate_index == 0 || s->frame_rate_index > 13) {
         av_log(avctx, AV_LOG_WARNING, "frame_rate_index %d is invalid\n", s->frame_rate_index);
-        return -1;
+        s->frame_rate_index = 1;
     }
     s->bit_rate = get_bits(&s->gb, 18) * 400;
     if (get_bits1(&s->gb) == 0) { /* marker */